Posts Tagged: Akeeba Backup


25
Feb 16

Breached Credit Union Comes Out of its Shell

Notifying people and companies about data breaches often can be a frustrating and thankless job. Despite my best efforts, sometimes a breach victim I’m alerting will come away convinced that I am not an investigative journalist but instead a scammer. This happened most recently this week, when I told a California credit union that its online banking site was compromised and apparently had been for nearly two months.

On Feb. 23, I contacted Coast Central Credit Union, a financial institution based in Eureka, Calif. that serves more than 60,000 customers. I explained who I was, how they’d likely been hacked, how they could verify the hack, and how they could fix the problem. Two days later when I noticed the site was still hacked, I contacted the credit union again, only to find they still didn’t believe me.

News of the compromise came to me via Alex Holden, a fellow lurker in the cybercrime underground and founder of Hold Security [full disclosure: While Holden’s site lists me as an advisor to his company, I receive zero compensation for that role]. Holden told me that crooks had hacked the credit union’s site and retrofitted it with a “Web shell,” a simple backdoor program that allows an attacker to remotely control the Web site and server using nothing more than a Web browser.

A view of the credit union's hacked Web site via the Web shell.

A screen shot of the credit union’s hacked Web site via the Web shell.

The credit union’s switchboard transferred me to a person in Coast Central’s tech department who gave his name only as “Vincent.” I told Vincent that the credit union’s site was very likely compromised, how he could verify it, etc. I also gave him my contact information, and urged him to escalate the issue. After all, I said, the intruders could use the Web shell program to upload malicious software that steals customer passwords directly from the credit union’s Web site. Vincent didn’t seem terribly alarmed about the news, and assured me that someone would be contacting me for more information.

This afternoon I happened to reload the login page for the Web shell on the credit union’s site and noticed it was still available. A call to the main number revealed that Vincent wasn’t in, but that Patrick in IT would take my call. For better or worse, Patrick was deeply skeptical that I was not impersonating the author of this site.

I commended him on his wariness and suggested several different ways he could independently verify my identity. When asked for a contact at the credit union that could speak to the media, Patrick said that person was him but declined to tell me his last name. He also refused to type in a Web address on his own employer’s Web site to verify the Web shell login page.

“I hope you do write about this,” Patrick said doubtfully, after I told him that I’d probably put something up on the site today about the hack. “That would be funny.”

The login page for the Web shell that was removed today from Coast Central Credit Union's Web site.

The login page for the Web shell that was removed today from Coast Central Credit Union’s Web site.

Exasperated, I told Patrick good luck and hung up. Thankfully, I did later hear from Ed Christians, vice president of information systems at Coast Central. Christians apologized for the runaround and said everyone in his department were regular readers of KrebsOnSecurity. “I was hoping I’d never get a call from you, but I guess I can cross that one off my list,” Christians said. “We’re going to get this thing taken down immediately.”

The credit union has since disabled the Web shell and is continuing to investigate the extent and source of the breach. There is some evidence to suggest the site may have been hacked via an outdated version of Akeeba Backup — a Joomla component that allows users to create and manage complete backups of a Joomla-based website. Screen shots of the files listed by the Web shell planted on Coast Central Credit Union indeed indicate the presence of Akeeba Backup on the financial institution’s Web server.

A Web search on one backdoor component that the intruders appear to have dropped on the credit union’s site on Dec. 29, 2015 — a file called “sfx.php” — turns up this blog post in which Swiss systems engineer Claudio Marcel Kuenzler described his investigation of a site that was hacked through the Akeeba Backup function. Continue reading →