Over the weekend, the “Chaos Computer Club” (CCC), a group considered to be the largest European Hacker Club, said it had identified and reverse engineered a Windows backdoor trojan that the group claims is being used by the German government.
The group provided a 20-page document (PDF, in German) detailing its analysis of the “lawful interception” malware program they say can “siphon away intimate data” and has backdoor functionality that allows it to execute other arbitrary programs.
“The government malware can, unchecked by a judge, load extensions by remote control, to use the trojan for other functions, including but not limited to eavesdropping,” the group wrote in a note on Saturday when announcing its discovery. “This complete control over the infected PC – owing to the poor craftsmanship that went into this trojan – is open not just to the agency that put it there, but to everyone.”
“The backdoor includes a keylogger that targets certain applications including Firefox, Skype, MSN Messenger, ICQ and others,” according to Mikko Hypponen, Chief Research Officer at F-Secure. “The backdoor also contains code intended to take screenshots and record audio, including recording Skype calls. In addition, the backdoor can be remotely updated. Servers that it connects to include 18.104.22.168 and 22.214.171.124,” he added.
While the malware is rather complex, the CCC criticized the developers for their sloppy security built into the software. “We were surprised and shocked by the lack of even elementary security in the code. Any attacker could assume control of a computer infiltrated by the German law enforcement authorities.” While many elements may point to as coming from a German Government agency, it’s too early to make an official accusation right now.
“We have no reason to suspect CCC’s findings, but we can’t confirm that this trojan was written by the German government,” Hypponen, commented in a blog post. “As far as we see, the only party that could confirm that would be the German government itself.”
F-Secure, along with Sophos, have each pledged to detect the backdoor. We expect several other vendors to follow with announcements on the malware over the next couple days.