Rewterz Threat Update – Former Conti Ransomware Gang Members Now Targeting Ukraine
September 8, 2022Rewterz Threat Alert – Ryuk Ransomware – Active IOCs
September 9, 2022Severity
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
- 0c5ecdc203f2424d96d27eac1e5ae206
- 8c479ce1a316bc813926cc59719d70dc
SHA-256
- e6ecb28f57fff1548b46869a15d5e684ba21fd724f833292438bdbc11b43666e
- 4ee626e058e7be9e5d20f314895500c5abf34c61a15a3b9b4f90c04f88c26aad
SHA-1
- 77b7bf9c19a63b464b5c085640a30a0d3cf70ea2
- 5e8d199bea62a8081896ce6a6c476e20920a5b83
Remediation
- Block the threat indicators at their respective controls.
- Search for IOCs in your environment.