Fake CISO Profiles on LinkedIn Target Fortune 500s

September 29, 2022

Someone has recently created a large number of fake LinkedIn profiles for Chief Information Security Officer (CISO) roles at some of the world’s largest corporations. It’s not clear who’s behind this network of fake CISOs or what their intentions may be. But the fabricated LinkedIn identities are confusing search engine results for CISO roles at major companies, and they are being indexed as gospel by various downstream data-scraping sources.

If one searches LinkedIn for the CISO of the energy giant Chevron, one might find the profile for a Victor Sites, who says he’s from Westerville, Ohio and is a graduate of Texas A&M University.

The LinkedIn profile for Victor Sites, who is most certainly NOT the CISO of Chevron.

Of course, Sites is not the real CISO of Chevron. That role is currently occupied by Christopher Lukas of Danville, Calif. If you were confused at this point, you might ask Google who it thinks is the current Chief Information Security Officer of Chevron. When KrebsOnSecurity did that earlier this morning, the fake CISO profile was the very first search result returned (followed by the LinkedIn profile for the real Chevron CISO).

Helpfully, LinkedIn seems to be able to detect something in common about all these fake CISO profiles, because it suggested I view a number of them in the “People Also Viewed” column seen in the image above. There are two fake CISO profiles suggested there, including one for a Maryann Robles, who claims to be the CISO of another energy giant — ExxonMobil.

Maryann’s profile says she’s from Tupelo, Miss., and includes this detail about how she became a self-described “old-school geek.”

“Since playing Tradewars on my Tandy 1000 with a 300 baud modem in the early ’90s, I’ve had a lifelong passion for technology, which I’ve carried with me as Deputy CISO of the world’s largest health plan,” her profile reads.

However, this description appears to have been lifted from the profile for the real CISO at the Centers for Medicare & Medicaid Services in Baltimore, Md. Continue reading

Accused Russian RSOCKS Botmaster Arrested, Requests Extradition to U.S.

September 23, 2022

A 36-year-old Russian man recently identified by KrebsOnSecurity as the likely proprietor of the massive RSOCKS botnet has been arrested in Bulgaria at the request of U.S. authorities. At a court hearing in Bulgaria this month, the accused hacker requested and was granted extradition to the United States, reportedly telling the judge, “America is looking for me because I have enormous information and they need it.”

A copy of the passport for Denis Kloster, as posted to his Vkontakte page in 2019.

On June 22, KrebsOnSecurity published Meet the Administrators of the RSOCKS Proxy Botnet, which identified Denis Kloster, a.k.a. Denis Emelyantsev, as the apparent owner of RSOCKS, a collection of millions of hacked devices that were sold as “proxies” to cybercriminals looking for ways to route their malicious traffic through someone else’s computer.

A native of Omsk, Russia, Kloster came into focus after KrebsOnSecurity followed clues from the RSOCKS botnet master’s identity on the cybercrime forums to Kloster’s personal blog, which featured musings on the challenges of running a company that sells “security and anonymity services to customers around the world.” Kloster’s blog even included a group photo of RSOCKS employees.

“Thanks to you, we are now developing in the field of information security and anonymity!,” Kloster’s blog enthused. “We make products that are used by thousands of people around the world, and this is very cool! And this is just the beginning!!! We don’t just work together and we’re not just friends, we’re Family.”

The Bulgarian news outlet 24Chasa.bg reports that Kloster was arrested in June at a co-working space in the southwestern ski resort town of Bansko, and that the accused asked to be handed over to the American authorities.

“I have hired a lawyer there and I want you to send me as quickly as possible to clear these baseless charges,” Kloster reportedly told the Bulgarian court this week. “I am not a criminal and I will prove it in an American court.”

Launched in 2013, RSOCKS was shut down in June 2022 as part of an international investigation into the cybercrime service. According to the Justice Department, the RSOCKS botnet initially targeted Internet of Things (IoT) devices, including industrial control systems, time clocks, routers, audio/video streaming devices, and smart garage door openers; later in its existence, the RSOCKS botnet expanded into compromising additional types of devices, including Android devices and conventional computers, the DOJ said.

The Justice Department’s June 2022 statement about that takedown cited a search warrant from the U.S. Attorney’s Office for the Southern District of California, which also was named by Bulgarian news outlets this month as the source of Kloster’s arrest warrant.

When asked about the existence of an arrest warrant or criminal charges against Kloster, a spokesperson for the Southern District said, “no comment.”

Update, Sept. 24, 9:00 a.m. ET: Kloster was named in a 2019 indictment (PDF) unsealed Sept. 23 by the Southern District court.

The employees who kept things running for RSOCKS, circa 2016. Notice that nobody seems to be wearing shoes.

24Chasa said the defendant’s surname is Emelyantsev and that he only recently adopted the last name Kloster, which is his mother’s maiden name.

As KrebsOnSecurity reported in June, Kloster also appears to be a major player in the Russian email spam industry. In several private exchanges on cybercrime forums, the RSOCKS administrator claimed ownership of the RUSdot spam forum. RUSdot is the successor forum to Spamdot, a far more secretive and restricted forum where most of the world’s top spammers, virus writers and cybercriminals collaborated for years before the community’s implosion in 2010. Continue reading

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SIM Swapper Abducted, Beaten, Held for $200k Ransom

September 21, 2022

A Florida teenager who served as a lackey for a cybercriminal group that specializes in cryptocurrency thefts was beaten and kidnapped last week by a rival cybercrime gang. The teen’s captives held guns to his head while forcing him to record a video message pleading with his crew to fork over a $200,000 ransom in exchange for his life. The youth is now reportedly cooperating with U.S. federal investigators, who are responding to an alarming number of reports of physical violence tied to certain online crime communities.

The grisly kidnapping video has been circulating on a number of Telegram chat channels dedicated to SIM-swapping — the practice of tricking or bribing mobile phone store employees into diverting a target’s phone number, text messages and calls to a device the attackers control.

The teen, known to the SIM-swapping community by the handle “Foreshadow,” appears to have served as a “holder” — a term used to describe a low-level member of any SIM-swapping group who agrees to carry out the riskiest and least rewarding role of the crime: Physically keeping and managing the various mobile devices and SIM cards that are used in SIM-swapping scams.

“Yo, Dan, please bro send the 200k,” Foreshadow said in the video, which was shot on Sept. 15 in the backseat of a moving car. Bleeding from a swollen mouth with two handguns pointed at his head, Foreshadow pleaded for his life. A still shot from that video is available here [Warning: the image is quite graphic].

“They’re going to kill me if you don’t,” Foreshadow continued, offering to get a job as a complicit mobile store employee or “plug” to help with future SIM-swaps. “I’ll pay you back. Just let me know what you need. I got you, for real. Any work for free. Whatever. However long you need me, too. I’ll apply to any store you need me to apply to. I can be a plug. I don’t care if I get caught by the cops or anything. I’ll get that money back for you. I used to do that work.”

It’s not clear where in the world the hostage video was recorded. But at one point in the video, the vehicle’s radio can be heard in the background mentioning WMIB, which is a hip-hop station in South Florida that serves both Ft. Lauderdale and Miami.

As Foreshadow’s hostage video began making the rounds on SIM-swapping Telegram channels, a rumor surfaced that Foreshadow had died after being shot in the leg. It soon emerged that Foreshadow had not died, and that he was cooperating with the Federal Bureau of Investigation (FBI). Members of the SIM-swapping community were then warned to delete any messages to or from Foreshadow. One of those messages read:

JUST IN: FORESHADOW IS NOT DEAD!!!!

HES CURRENTLY CO-OPERATING WITH THE FBI DUE TO HIM BEING KIDNAPPED AND AN ATTEMPT TO EXTORT HIM FOR 200K

IF YOU HAVE CHATS WITH HIM CLEAR THEM

Foreshadow appears to be a teenager from Florida whose first name is Justin. Foreshadow’s main Telegram account was converted from a user profile into a channel on Sept. 15 — the same day he was assaulted and kidnapped — and it is not currently responding to messages.

Foreshadow’s erstwhile boss Jarik told KrebsOnSecurity that the youth was indeed shot by his captors, and blamed the kidnapping on a rival SIM-swapper from Australia who was angry over getting shortchanged of the profits from a previous SIM-swapping escapade.

The FBI did not immediately respond to requests for comment.

Reached via Telegram, the alleged mastermind of the kidnapping — a SIM-swapper who uses the handle “Gus” — confirmed that he ordered the attack on Foreshadow because the holder had held back some of his stolen funds. In the same breath, Gus said Jarik was “gonna get done in next” for sharing Gus’ real name and address with KrebsOnSecurity.

“No1 cared about that nigga anyway, he snaked targs [targets] and flaunted it everywhere,” Gus said of Foreshadow. “I’ve been fucked over so many times I’ve lost millions. I am just a guy trying to make more money.”

Foreshadow’s experience is the latest example of a rapidly escalating cycle of physical violence that is taking hold of criminal SIM-swapping communities online. Earlier this month, KrebsOnSecurity detailed how multiple SIM-swapping Telegram channels are now replete with “violence-as-a-service” offerings, wherein denizens of the underground hire themselves out to perform various forms of physical violence — from slashing tires and throwing a brick through someone’s window, to conducting drive-by shootings, firebombings and home invasions. Continue reading

Botched Crypto Mugging Lands Three U.K. Men in Jail

September 16, 2022

Three men in the United Kingdom were arrested this month for attempting to assault a local man and steal his virtual currencies. The incident is the latest example of how certain cybercriminal communities are increasingly turning to physical violence to settle scores and disputes.

Shortly after 11 p.m. on September 6, a resident in the Spalding Common area in the district of Lincolnshire, U.K. phoned police to say three men were acting suspiciously, and had jumped a nearby fence.

“The three men made off in a VW Golf and were shortly stopped nearby,” reads a statement by the Lincolnshire Police. “The car was searched by officers who found an imitation firearm, taser, a baseball bat and police uniform in the boot.”

Thomas Green, 23, Rayhan Miah, 23, and Leonardo Sapiano, 24 were all charged with possession of the weapons, and “with intent to cause loss to another to make an unwarranted demand of Crypto Currency from a person.”

KrebsOnSecurity has learned that the defendants were in Spalding Common to pay a surprise visit to a 19-year-old hacker known by the handles “Discoli,” “Disco Dog,” and “Chinese.” In December 2020, Discoli took credit for hacking and leaking the user database for OGUsers, a forum overrun with people looking to buy, sell and trade access to compromised social media accounts.

Reached via Telegram, Discoli confirmed that police believe the trio was trying to force their way into his home in Spalding Common, and that one of them was wearing a police uniform when they approached his residence.

“They were obvious about being fake police, so much so that one of our neighbours called,” Discoli said in an instant message chat. “That call led to the arrests. Their intent was for robbery/blackmail of crypto, I just happened to not be home at the time.”

The Lincolnshire Police declined to comment for this story, citing an ongoing investigation.

Discoli said he didn’t know any of the men charged, but believes they were hired by one of his enemies. And he said his would-be assailants didn’t just target him specifically.

“They had a list of people they wanted to hit consecutively as far as I know,” he said.

The foiled robbery is the latest drama tied to members of certain criminal hacking communities who are targeting one another with physical violence, by making a standing offer to pay thousands of dollars to anyone in the target’s region who agrees to carry out the assaults.

Last month, a 21-year-old New Jersey man was arrested and charged with stalking in connection with a federal investigation into groups of cybercriminals who are settling scores by hiring people to carry out physical attacks on their rivals.

Prosecutors say Patrick McGovern-Allen recently participated in several of these schemes — including firing a handgun into a Pennsylvania home and torching a residence in another part of the state with a Molotov Cocktail. Continue reading

Say Hello to Crazy Thin ‘Deep Insert’ ATM Skimmers

September 14, 2022

A number of financial institutions in and around New York City are dealing with a rash of super-thin “deep insert” skimming devices designed to fit inside the mouth of an ATM’s card acceptance slot. The card skimmers are paired with tiny pinhole cameras that are cleverly disguised as part of the cash machine. Here’s a look at some of the more sophisticated deep insert skimmer technology that fraud investigators have recently found in the wild.

This ultra thin and flexible “deep insert” skimmer recently recovered from an NCR cash machine in New York is about half the height of a U.S. dime. The large yellow rectangle is a battery. Image: KrebsOnSecurity.com.

The insert skimmer pictured above is approximately .68 millimeters tall. This leaves more than enough space to accommodate most payment cards (~.54 mm) without interrupting the machine’s ability to grab and return the customer’s card. For comparison, this flexible skimmer is about half the height of a U.S. dime (1.35 mm).

These skimmers do not attempt to siphon chip-card data or transactions, but rather are after the cardholder data still stored in plain text on the magnetic stripe on the back of most payment cards issued to Americans.

Here’s what the other side of that insert skimmer looks like:

The other side of the deep insert skimmer. Image: KrebsOnSecurity.com.

The thieves who designed this skimmer were after the magnetic stripe data and the customer’s 4-digit personal identification number (PIN). With those two pieces of data, the crooks can then clone payment cards and use them to siphon money from victim accounts at other ATMs.

To steal PINs, the fraudsters in this case embedded pinhole cameras in a false panel made to fit snugly over the cash machine enclosure on one side of the PIN pad.

Pinhole cameras were hidden in these false side panels glued to one side of the ATM, and angled toward the PIN pad. Image: KrebsOnSecurity.com.

Continue reading

Wormable Flaw, 0days Lead Sept. 2022 Patch Tuesday

September 13, 2022

This month’s Patch Tuesday offers a little something for everyone, including security updates for a zero-day flaw in Microsoft Windows that is under active attack, and another Windows weakness experts say could be used to power a fast-spreading computer worm. Also, Apple has also quashed a pair of zero-day bugs affecting certain macOS and iOS users, and released iOS 16, which offers a new privacy and security feature called “Lockdown Mode.” And Adobe axed 63 vulnerabilities in a range of products.

Microsoft today released software patches to plug at least 64 security holes in Windows and related products. Worst in terms of outright scariness is CVE-2022-37969, which is a “privilege escalation” weakness in the Windows Common Log File System Driver that allows attackers to gain SYSTEM-level privileges on a vulnerable host. Microsoft says this flaw is already being exploited in the wild.

Kevin Breen, director of cyber threat research at Immersive Labs, said any vulnerability that is actively targeted by attackers in the wild must be put to the top of any patching list.

“Not to be fooled by its relatively low CVSS score of 7.8, privilege escalation vulnerabilities are often highly sought after by cyber attackers,” Breen said. “Once an attacker has managed to gain a foothold on a victim’s system, one of their first actions will be to gain a higher level of permissions, allowing the attacker to disable security applications and any device monitoring. There is no known workaround to date, so patching is the only effective mitigation.”

Satnam Narang at Tenable said CVE-2022-24521 — a similar vulnerability in the same Windows log file component — was patched earlier this year as part of Microsoft’s April Patch Tuesday release and was also exploited in the wild.

“CVE-2022-37969 was disclosed by several groups, though it’s unclear if CVE-2022-37969 is a patch-bypass for CVE-2022-24521 at this point,” Narang said.

Another vulnerability Microsoft patched this month — CVE-2022-35803 — also seems to be related to the same Windows log file component. While there are no indications CVE-2022-35803 is being actively exploited, Microsoft suggests that exploitation of this flaw is more likely than not.

Trend Micro’s Dustin Childs called attention to CVE-2022-34718, a remote code execution flaw in the Windows TCP/IP service that could allow an unauthenticated attacker to execute code with elevated privileges on affected systems without user interaction.

“That officially puts it into the ‘wormable’ category and earns it a CVSS rating of 9.8,” Childs said. “However, only systems with IPv6 enabled and IPSec configured are vulnerable. While good news for some, if you’re using IPv6 (as many are), you’re probably running IPSec as well. Definitely test and deploy this update quickly.”

Cisco Talos warns about four critical vulnerabilities fixed this month — CVE-2022-34721 and CVE-2022-34722 — which have severity scores of 9.8, though they are “less likely” to be exploited, according to Microsoft.

“These are remote code execution vulnerabilities in the Windows Internet Key Exchange protocol that could be triggered if an attacker sends a specially crafted IP packet,” wrote Jon Munshaw and Asheer Malhotra. “Two other critical vulnerabilities, CVE-2022-35805 and CVE-2022-34700 exist in on-premises instances of Microsoft Dynamics 365. An authenticated attacker could exploit these vulnerabilities to run a specially crafted trusted solution package and execute arbitrary SQL commands. The attacker could escalate their privileges further and execute commands as the database owner.” Continue reading

Transacting in Person with Strangers from the Internet

September 9, 2022

Communities like Craigslist, OfferUp, Facebook Marketplace and others are great for finding low- or no-cost stuff that one can pick up directly from a nearby seller, and for getting rid of useful things that don’t deserve to end up in a landfill. But when dealing with strangers from the Internet, there is always a risk that the person you’ve agreed to meet has other intentions.

Nearly all U.S. states now have designated safe trading stations — mostly at local police departments — which ensure that all transactions are handled in plain view of both the authorities and security cameras.

These safe trading places exist because sometimes in-person transactions from the Internet don’t end well for one or more parties involved. The website Craigslistkillers has catalogued news links for at least 132 murders linked to Craigslist transactions since 2015. Many of these killings involved high-priced items like automobiles and consumer electronics, where the prospective buyer apparently intended all along to kill the owner and steal the item offered for sale. Others were motivated simply by a desire to hurt people.

This is not to say that using Craigslist is uniquely risky or dangerous; I’m sure the vast majority of transactions generated by the site end amicably and without physical violence. And that probably holds true for all of Craigslist’s competitors.

Still, the risk of a deal going badly when one meets total strangers from the Internet is not zero, and so it’s only sensible to take a few simple precautions. For example, choosing to transact at a designated safe place such as a police station dramatically reduces the likelihood that anyone wishing you harm would even show up.

I recently stumbled upon one of these designated exchange places by accident, hence my interest in learning more about them. The one I encountered was at a Virginia county sheriff’s office, and it has two parking spots reserved with a sign that reads, “Internet Purchase & Exchange Location: This Area is Under 24 Hour Video Surveillance” [image above].

According to the list maintained at Safetradestations.com, there are four other such designated locations in Northern Virginia. And it appears most states now have them in at least some major cities. Safeexchangepoint.com also has a searchable index of safe trading locations in the United States and Canada.

Granted, not everyone is going to live close to one of these designated trading stations. Or maybe what you want to buy, sell or trade you’d rather not have recorded in front of police cameras. Either way, here are a few tips on staying safe while transacting in real life with strangers from the Internet (compliments of the aforementioned safe trading websites). Continue reading

Violence-as-a-Service: Brickings, Firebombings & Shootings for Hire

September 4, 2022

A 21-year-old New Jersey man has been arrested and charged with stalking in connection with a federal investigation into groups of cybercriminals who are settling scores by hiring people to carry out physical attacks on their rivals. Prosecutors say the defendant recently participated in several of these schemes — including firing a handgun into a Pennsylvania home and torching a residence in another part of the state with a Molotov Cocktail.

Patrick McGovern-Allen of Egg Harbor Township, N.J. was arrested on Aug. 12 on a warrant from the U.S. Federal Bureau of Investigation. An FBI complaint alleges McGovern-Allen was part of a group of co-conspirators who are at the forefront of a dangerous escalation in coercion and intimidation tactics increasingly used by competing cybercriminal groups.

Prosecutors say that around 2 a.m. on Jan 2, 2022, McGovern-Allen and an unidentified co-conspirator fired multiple handgun rounds into a residence in West Chester, Pa. Fortunately, none of the residents inside the home at the time were injured. But prosecutors say the assailants actually recorded video of the attack as “proof” that the shooting had been carried out.

A copy of that video was obtained by KrebsOnSecurity. According to investigators, McGovern-Allen was one of the shooters, who yelled “Justin Active was here” as they haphazardly fired at least eight rounds into the lower story of the West Chester residence.

On Dec. 18, 2021, police in Abington Township, Pa., responded to reports of a house fire from homeowners who said it sounded like something was thrown at their residence just prior to the fire.

Weeks later, on the day of the shooting in West Chester, a detective with the Westtown East Goshen Police Department contacted the Abington police and shared another video that was circulating on several online message boards that appeared to show two individuals setting fire to the Abington Township residence. The criminal complaint said the two police officers agreed the same suspect was present in both videos.

A copy of that video also was obtained by KrebsOnSecurity, and it shows at least two individuals smashing a window, then lighting a rag-soaked Mad Dog 20/20 grape wine bottle and hurling it at the side of the home [Update: My apologies for the file download link, but YouTube just deleted both of the videos included in this story — for allegedly violating their community standards].

“The Molotov cocktail caused the immediate surrounding area to ignite, including the siding of the house, grass, and the wooden chair,” the government’s complaint against McGovern-Allen states. “The two suspects then fled on foot toward the street and begin yelling something when the video stops.”

The government mentions the victims only by their initials — “K.M.” in the shooting and “A.R.” in the firebombing — but said both had been the target of previous harassment by rival cybercriminal groups that included swatting attacks, wherein the perpetrators spoof a distress call to the police about a hostage situation, suicide or bomb threat with the goal of sending a heavily-armed police response to a targeted address.

A number of previous swatting incidents have turned deadly. But these more “hands-on” and first person attacks are becoming increasingly common within certain cybercriminal communities, particularly those engaged in SIM swapping, a crime in which identity thieves hijack a target’s mobile phone number and use that to wrest control over the victim’s various online accounts and identities.

The complaint mentions a handle and user ID allegedly used by McGovern-Allen’s online persona “Tongue” on the Discord chat service, (user: “Tongue#0001”).

“In the chats, [Tongue] tells other Discord users that he was the person who shot K.M.’s house and that he was willing to commit firebombings using Molotov Cocktails,” the complaint alleges. “For example, in one Discord chat from March 2022, [the defendant] states ‘if you need anything done for $ lmk [“let me know”]/I did a shooting/Molotov/but I can also do things for ur entertainment.” Continue reading

Final Thoughts on Ubiquiti

August 31, 2022

Last year, I posted a series of articles about a purported “breach” at Ubiquiti. My sole source for that reporting was the person who has since been indicted by federal prosecutors for his alleged wrongdoing – which includes providing false information to the press.

As a result of the new information that has been provided to me, I no longer have faith in the veracity of my source or the information he provided to me. I always endeavor to ensure that my articles are properly sourced and factual.

This time, I missed the mark and, as a result, I would like to extend my sincerest apologies to Ubiquiti, and I have decided to remove those articles from my website.

How 1-Time Passcodes Became a Corporate Liability

August 30, 2022

Phishers are enjoying remarkable success using text messages to steal remote access credentials and one-time passcodes from employees at some of the world’s largest technology companies and customer support firms. A recent spate of SMS phishing attacks from one cybercriminal group has spawned a flurry of breach disclosures from affected companies, which are all struggling to combat the same lingering security threat: The ability of scammers to interact directly with employees through their mobile devices.

In mid-June 2022, a flood of SMS phishing messages began targeting employees at commercial staffing firms that provide customer support and outsourcing to thousands of companies. The missives asked users to click a link and log in at a phishing page that mimicked their employer’s Okta authentication page. Those who submitted credentials were then prompted to provide the one-time password needed for multi-factor authentication.

The phishers behind this scheme used newly-registered domains that often included the name of the target company, and sent text messages urging employees to click on links to these domains to view information about a pending change in their work schedule.

The phishing sites leveraged a Telegram instant message bot to forward any submitted credentials in real-time, allowing the attackers to use the phished username, password and one-time code to log in as that employee at the real employer website. But because of the way the bot was configured, it was possible for security researchers to capture the information being sent by victims to the public Telegram server.

This data trove was first reported by security researchers at Singapore-based Group-IB, which dubbed the campaign “0ktapus” for the attackers targeting organizations using identity management tools from Okta.com.

“This case is of interest because despite using low-skill methods it was able to compromise a large number of well-known organizations,” Group-IB wrote. “Furthermore, once the attackers compromised an organization they were quickly able to pivot and launch subsequent supply chain attacks, indicating that the attack was planned carefully in advance.”

It’s not clear how many of these phishing text messages were sent out, but the Telegram bot data reviewed by KrebsOnSecurity shows they generated nearly 10,000 replies over approximately two months of sporadic SMS phishing attacks targeting more than a hundred companies.

A great many responses came from those who were apparently wise to the scheme, as evidenced by the hundreds of hostile replies that included profanity or insults aimed at the phishers: The very first reply recorded in the Telegram bot data came from one such employee, who responded with the username “havefuninjail.”

Still, thousands replied with what appear to be legitimate credentials — many of them including one-time codes needed for multi-factor authentication. On July 20, the attackers turned their sights on internet infrastructure giant Cloudflare.com, and the intercepted credentials show at least three employees fell for the scam.

Image: Cloudflare.com

In a blog post earlier this month, Cloudflare said it detected the account takeovers and that no Cloudflare systems were compromised. Cloudflare said it does not rely on one-time passcodes as a second factor, so there was nothing to provide to the attackers. But Cloudflare said it wanted to call attention to the phishing attacks because they would probably work against most other companies.

“This was a sophisticated attack targeting employees and systems in such a way that we believe most organizations would be likely to be breached,” Cloudflare CEO Matthew Prince wrote. “On July 20, 2022, the Cloudflare Security team received reports of employees receiving legitimate-looking text messages pointing to what appeared to be a Cloudflare Okta login page. The messages began at 2022-07-20 22:50 UTC. Over the course of less than 1 minute, at least 76 employees received text messages on their personal and work phones. Some messages were also sent to the employees family members.”

On three separate occasions, the phishers targeted employees at Twilio.com, a San Francisco based company that provides services for making and receiving text messages and phone calls. It’s unclear how many Twilio employees received the SMS phishes, but the data suggest at least four Twilio employees responded to a spate of SMS phishing attempts on July 27, Aug. 2, and Aug. 7.

On that last date, Twilio disclosed that on Aug. 4 it became aware of unauthorized access to information related to a limited number of Twilio customer accounts through a sophisticated social engineering attack designed to steal employee credentials.

“This broad based attack against our employee base succeeded in fooling some employees into providing their credentials,” Twilio said. “The attackers then used the stolen credentials to gain access to some of our internal systems, where they were able to access certain customer data.”

That “certain customer data” included information on roughly 1,900 users of the secure messaging app Signal, which relied on Twilio to provide phone number verification services. In its disclosure on the incident, Signal said that with their access to Twilio’s internal tools the attackers were able to re-register those users’ phone numbers to another device.

On Aug. 25, food delivery service DoorDash disclosed that a “sophisticated phishing attack” on a third-party vendor allowed attackers to gain access to some of DoorDash’s internal company tools. DoorDash said intruders stole information on a “small percentage” of users that have since been notified. TechCrunch reported last week that the incident was linked to the same phishing campaign that targeted Twilio.

This phishing gang apparently had great success targeting employees of all the major mobile wireless providers, but most especially T-Mobile. Between July 10 and July 16, dozens of T-Mobile employees fell for the phishing messages and provided their remote access credentials.

“Credential theft continues to be an ongoing issue in our industry as wireless providers are constantly battling bad actors that are focused on finding new ways to pursue illegal activities like this,” T-Mobile said in a statement. “Our tools and teams worked as designed to quickly identify and respond to this large-scale smishing attack earlier this year that targeted many companies. We continue to work to prevent these types of attacks and will continue to evolve and improve our approach.”

This same group saw hundreds of responses from employees at some of the largest customer support and staffing firms, including Teleperformanceusa.com, Sitel.com and Sykes.com. Teleperformance did not respond to requests for comment. KrebsOnSecurity did hear from Christopher Knauer, global chief security officer at Sitel Group, the customer support giant that recently acquired Sykes. Knauer said the attacks leveraged newly-registered domains and asked employees to approve upcoming changes to their work schedules.

Image: Group-IB.

Knauer said the attackers set up the phishing domains just minutes in advance of spamming links to those domains in phony SMS alerts to targeted employees. He said such tactics largely sidestep automated alerts generated by companies that monitor brand names for signs of new phishing domains being registered.

“They were using the domains as soon as they became available,” Knauer said. “The alerting services don’t often let you know until 24 hours after a domain has been registered.” Continue reading