Rewterz Threat Alert – Cobalt Strike Malware – IOCs

Severity

High

Analysis Summary

Cobalt Strike is a paid penetration testing product that allows an attacker to deploy an agent named ‘Beacon’ on the victim machine. Beacon includes a wealth of functionality to the attacker, including, but not limited to command execution, keylogging, file transfer, SOCKS proxying, privilege escalation, mimikatz, port scanning, and lateral movement. Beacon is in-memory/file-less, in that it consists of stageless or multi-stage shellcode that once loaded by exploiting a vulnerability or executing a shellcode loader, will reflectively load itself into the memory of a process without touching the disk. It supports C2 and staging over HTTP, HTTPS, DNS, SMB named pipes as well as forward and reverse TCP; Beacons can be daisy-chained. Cobalt Strike comes with a toolkit for developing shellcode loaders, called Artifact Kit

Impact

• Data Exfiltration
• Information Theft

Indicators of Compromise

Domain Name

• dirupun[.]com
• croperdate[.]com
• bmwfor[.]com
• acurashu[.]com
• karavan[.]azureedge[.]net
• tcmb[.]azureedge[.]net
• merssed[.]com
• menoiras[.]space
• mazdafo[.]com
• marshbol[.]com
• losmapes[.]com
• imagalytics[.]com
• identalytics[.]com
• hondame[.]com
• freshjuk[.]com
• fivezin[.]com

MD5

• 08def560c0be9666636a8dacf5e60ae6

SHA-256

• a67b47abcaeac789e1716ddd92b3c4bdf74abd04c5583958a27b16dbe26a35e7

SHA-1

• cab565fc2c7f7cc535e0d5d0a7d49b4a615162d2

URL

http[:]//menoiras[.]space/222g100/index[.]php

Remediation

• Block the threat indicators at their respective controls.
• Do not visit links given in untrusted emails, even if they redirect to Google Drive.
• Search for IOCs in your environment.