Trojan makes rounds on Facebook via IMs

Share this article:
Trojan makes rounds on Facebook via IMs first warned users about the threat targeting Windows users.

A trojan, which appears to hijack Facebook users' accounts in an effort to steal credentials, used instant messaging lures to spread through the social networking site.

Earlier this week, security firm Malwarebytes warned users about the threat. In a Tuesday blog post, Adam Kujawa, who leads the company's malware intelligence team, said that a Malwarebytes user alerted the team about the spurious IMs.

The trojan, which targets Windows users, is delivered via a Facebook IM that often contains a luring message, like “lol,” to incite users to open supposed photos.

Once the user downloads and unzips a zip file thought to contain an image file, they are actually infected with the malware, Kujawa explained. From there, the cycle continues, with the compromised account instant messaging other contacts – now potential victims.

Kujawa added that the purported image is actually a Java Archive (JAR) file, which shows how saboteurs drew from techniques often used in drive-by attacks.

“Usually we only see this kind of method used on drive-by attacks, where the Java [file] is used to exploit the system and execute the malware,” Kujawa wrote. “In this case, the java file (not inherently malicious on its own) reaches out and downloads the actual malware from a remote Dropbox account. It then installs the malware as a service on the system, silently.”

On Friday, a Facebook spokesperson offered a statement on the threat to

"We're aware of these messages and are actively removing the malicious links from our systems," the spokesperson wrote, before providing a link on securing Facebook accounts.

In his blog post, Malwarebyte's Kujawa shared that, while the trojan is still being analyzed, researchers can say with certainty that the malware “injects into legitimate processes currently running on the victims' system.”

Share this article:

Sign up to our newsletters

More in News

Cyber Command tests gov't collaboration in wake of attacks

The two-week exercise, "Cyber Guard 14-1," was completed this month.

Text message spammer settles charges filed by FTC

Text message spammer settles charges filed by FTC

Rishab Verma and his company agreed to settle charges filed by the FTC that Verma sent millions of spam text messages that deceitfully promised free merchandise.

Rhode Island hospital to pay $150K for past data breach

More than 12,000 patients' personal and health information was compromised in a breach at The Women & Infants Hospital of Rhode Island.