Rewterz Threat Alert – Cobalt Strike Malware – Active IOCs

Severity

High

Analysis Summary

Cobalt Strike first appeared in 2012 in response to alleged flaws in the Metasploit Framework, an existing red team (penetration testing) tool. Cobalt Strike 3.0 was released in 2015 as a stand-alone opponent emulation platform. However, researchers began observing threat actors using Cobalt Strike by 2016. Cobalt Strike’s use in hostile activities was previously connected with huge cybercriminal operations like TA3546 and APT40. Two-thirds of detected Cobalt hit efforts from 2016 to 2018 were attributable to well-resourced cybercrime organizations or APT groups, according to researchers.

Cobalt Strike lets the attacker install a ‘Beacon’ agent on the target PC which provides the attacker with a plethora of capabilities, including command execution, file transfer, keylogging, mimikatz, port scanning, and privilege escalation. Cobalt Strike includes a toolkit called Artifact Kit that is used to create shellcode loaders

Impact

• Data Exfiltration
• Information Theft

Indicators of Compromise

MD5

• e2e58c6b4fc6aa36eb5f6b5e6b8743ff
• 57bd68116cb87e236f03ed1fac634d05

SHA-256

• ca9da17b4b24bb5b24cc4274cc7040525092dffdaa5922f4a381e5e21ebf33aa
• 6bad84c1c49f3a3641b922d567bcc076cce1c012d0b4988fc6c28bc35626afe9

SHA-1

• 69d51fb780982d928411d39244c1d0ff1c34b103
• f2cc888df1d392b01155c4d9f44845c8fd090be8

Remediation

• Block all threat indicators at your respective controls.
• Search for IOCs in your enviornment.