Tag Archives: Verizon

Why You Should Opt Out of Sharing Data With Your Mobile Provider

March 20, 2023
39 Comments

A new breach involving data from nine million AT&T customers is a fresh reminder that your mobile provider likely collects and shares a great deal of information about where you go and what you do with your mobile device — unless and until you affirmatively opt out of this data collection. Here’s a primer on why you might want to do that, and how.
Certain questions might be coming to mind right now, like “What the heck is CPNI?” And, ‘If it’s so ‘customer proprietary,’ why is AT&T sharing it with marketers?” Also maybe, “What can I do about it?” Read on for answers to all three questions.

Fighting Fake EDRs With ‘Credit Ratings’ for Police

April 27, 2022
47 Comments

When KrebsOnSecurity last month explored how cybercriminals were using hacked email accounts at police departments worldwide to obtain warrantless Emergency Data Requests (EDRs) from social media and technology providers, many security experts called it a fundamentally unfixable problem. But don’t tell that to Matt Donahue, a former FBI agent who recently quit the agency to launch a startup that aims to help tech companies do a better job screening out phony law enforcement data requests — in part by assigning trustworthiness or “credit ratings” to law enforcement authorities worldwide.

Using Fake Reviews to Find Dangerous Extensions

May 29, 2021
39 Comments

Fake, positive reviews have infiltrated nearly every corner of life online these days, confusing consumers while offering an unwelcome advantage to fraudsters and sub-par products everywhere. Happily, identifying and tracking these fake reviewer accounts is often the easiest way to spot scams. Here’s the story of how bogus reviews on a counterfeit Microsoft Authenticator browser extension exposed dozens of other extensions that siphoned personal and financial data.

Recycle Your Phone, Sure, But Maybe Not Your Number

May 19, 2021
37 Comments

Many online services allow users to reset their passwords by clicking a link sent via SMS, and this unfortunately widespread practice has turned mobile phone numbers into de facto identity documents. Which means losing control over one thanks to a divorce, job termination or financial crisis can be devastating.

Even so, plenty of people willingly abandon a mobile number without considering the potential fallout to their digital identities when those digits invariably get reassigned to someone else. New research shows how fraudsters can abuse wireless provider websites to identify available, recycled mobile numbers that allow password resets at a range of email providers and financial services online.

Sale of 4 Million Stolen Cards Tied to Breaches at 4 Restaurant Chains

November 26, 2019
78 Comments

On Nov. 23, one of the cybercrime underground’s largest bazaars for buying and selling stolen payment card data announced the immediate availability of some four million freshly-hacked debit and credit cards. KrebsOnSecurity has learned this latest batch of cards was siphoned from four different compromised restaurant chains that are most prevalent across the midwest and eastern United States.

U.S. Mobile Giants Want to be Your Online Identity

September 12, 2018
101 Comments

The four major U.S. wireless carriers today detailed a new initiative that may soon let Web sites eschew passwords and instead authenticate visitors by leveraging data elements unique to each customer’s phone and mobile subscriber account, such as location, customer reputation, and physical attributes of the device. Here’s a look at what’s coming, and the potential security and privacy trade-offs of trusting the carriers to handle online authentication on your behalf.

Alleged SIM Swapper Arrested in California

August 22, 2018
57 Comments

Authorities in Santa Clara, Calif. have arrested and charged a 19-year-old area man on suspicion hijacking mobile phone numbers as part of a scheme to steal large sums of bitcoin and other cryptocurrencies. The arrest is the third known law enforcement action this month targeting “SIM swappers,” individuals who specialize in stealing wireless phone numbers and hijacking online financial and social media accounts tied to those numbers.

Hanging Up on Mobile in the Name of Security

August 16, 2018
96 Comments

An entrepreneur and virtual currency investor is suing AT&T for $224 million, claiming the wireless provider was negligent when it failed to prevent thieves from hijacking his mobile account and stealing millions of dollars in cryptocurrencies. Increasingly frequent, high-profile attacks like these are prompting some experts to say the surest way to safeguard one’s online accounts may be to disconnect them from the mobile providers entirely.

Hackers Breached Virginia Bank Twice in Eight Months, Stole $2.4M

July 24, 2018
70 Comments

Hackers used phishing emails to break into a Virginia bank in two separate cyber intrusions over an eight-month period, making off with more than $2.4 million total. Now the financial institution is suing its cybersecurity insurance provider for refusing to fully cover the losses.

Supreme Court: Police Need Warrant for Mobile Location Data

June 22, 2018
24 Comments

The U.S. Supreme Court today ruled that the government needs to obtain a court-ordered warrant to gather location data on mobile device users. The decision is a major development for privacy rights, but experts say it may have limited bearing on the selling of real-time customer location data by the wireless carriers to third-party companies.