Complex Malware Installed by Simple Phishing Attacks

August 9th, 2017 by admin Leave a reply »

A new JScript back door called Bateleur distributed by the FIN7 (a.k.a Carbanak) hacker group through phishing emails targeting U.S.-based restaurant chains has been identified by Proofpoint researchers.

The modus operands is simple. The receiver gets the email containing document which contains macro. The message of the email is “here is the check as discussed.”

The executed macro creates a scheduled task to run Bateleur which then sleeps for three seconds and then again executes Bateleur and then sleeps for 10 seconds. Finally, it deletes the scheduled task.

“The combined effect of these commands is to run Bateleur on the infected system in a roundabout manner in an attempt to evade detection,” the researchers note.

The JScript macro contains anti-sandbox and anti-analysis functionality.

“We continue to see regular changes to the tactics and tools used by FIN7 in their attempt to infect more targets and evade detection,” the researchers state. “The Bateleur JScript back door and new macro-laden documents appear to be the latest in the group’s expanding toolset, providing new means of infection, additional ways of hiding their activity, and growing capabilities for stealing information and executing commands directly on victim machines.”

Simon Taylor, vice president of products at Glasswall, mentioned that though the software is complex, a method of installing it is very straight forward through phishing email.

“Phishing is a tried and true method for attackers — largely because it is predictably and repeatedly successful,” he said.

“Historically, the security industry has attempted to change employee behaviour,” Taylor added. “But while education helps, cyber criminals are continuously adjusting their techniques and the authenticity of their messages in order to stay several steps ahead of their victims.”

“Humans are and always will be the weakest link in an organization, and going forward, defense and detection strategies must change to address these inevitable challenges,” Taylor said.

Cyber Resilience

____________________________________________________________________________________________

Alertsec is based on the 256-bit AES encryption algorithm and has the highest security certifications.

Leave a Reply