Qualys Blog

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2 posts

New ‘Silence’ Banking Trojan copies Carbanak to Steal from Banks (Analysis with IOCs)

Dark Reading is reporting on a new banking trojan called ‘Silence’ that mimics techniques similar to the Carbanak hacker group targeting banks and financial institutions.  The attack vector is similar – target individuals using spear-phish emails to trick them into running a malicious attachment which will connect to download a dropper to further infect the user’s machine.  This attack does not use an exploit against a vulnerability, but rather takes advantage of social engineering to fool the user into executing the malicious payload and infecting their machine.

Silence is interesting in that the trojan’s capabilities include a screen grabber that will take multiple screenshots of the user’s active monitor and upload the real-time stream to a command and control server for monitoring by the adversary.  This technique allows the threat actor to identify which users have access to specific banking applications, systems, and accounts that they can use for financial gain.

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Bad Rabbit – Ransomware

(updated: 10/26/2017 with additional file hashes and mitigations)

A new ransomware campaign has affected at least three Russian media companies in a fast-spreading malware attack. Fontanka and Interfax are among the companies affected by the Bad Rabbit ransomware named by the researchers who first discovered it. The malware is delivered as fake Flash installer, it uses the SMB protocol to check hardcoded credentials. Bad Rabbit does not employ any exploits to gain execution or elevation of privilege. The Ukrainian computer emergency agency CERT-UA has issued an alert incident and mentioned that Odessa airport and Kiev subway were also affected. It is unsure whether this alert is regarding Bad Rabbit, but they suspect that it may be the start of a new wave of cyberattacks.

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