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This alert includes IOCs related to HIDDEN COBRA, IP addresses linked to systems infected with Volgmer malware, malware descriptions, and associated signatures.
This alert also includes suggested response actions to the IOCs provided, recommended mitigation techniques, and information on reporting incidents.
MAR-10135536-D examines the tactics, techniques, and procedures observed.
For a downloadable copy of the MAR, see: Volgmer is a backdoor Trojan designed to provide covert access to a compromised system.
If users or administrators detect activity associated with the Volgmer malware, they should immediately flag it, report it to the DHS National Cybersecurity and Communications Integration Center (NCCIC) or the FBI Cyber Watch (Cy Watch), and give it the highest priority for enhanced mitigation.
Upon reviewing the traffic from these IP addresses, system owners may find some traffic relates to malicious activity and some traffic relates to legitimate activity.
The malware then overwrites the Service DLL entry in the selected service's registry entry.
In some cases, HIDDEN COBRA actors give the created service a pseudo-random name that may be composed of various hardcoded words.
The malware is a fully functional RAT with multiple commands that the actors can issue from a command and control (C2) server to a victim’s system via dual proxies.
FALLCHILL typically infects a system as a file dropped by other HIDDEN COBRA malware or as a file downloaded unknowingly by users when visiting sites compromised by HIDDEN COBRA actors.Yes, there are verified malware programs out there for both the Macintosh and for Linux. Equally importantly, if you don't at least run an antivirus program, you run the risk of passing a virus on to your Windows friends (assuming any of them actually talk to you). So I've split the Tango into parts - Windows, Linux, the Macintosh, etc. But you get to all of them by that same "Let's Dance! Original release date: November 14, 2017 | Last revised: November 15, 2017 Network systems This joint Technical Alert (TA) is the result of analytic efforts between the Department of Homeland Security (DHS) and the Federal Bureau of Investigation (FBI). FBI has high confidence that HIDDEN COBRA actors are using the IP addresses—listed in this report’s IOC files—to maintain a presence on victims’ networks and to further network exploitation.