Cobalt strike beacon9/21/2023 ![]() ![]() We also describe ways to detect: (i) Cobalt Strike payloads such as the DNS beacon based on the nature and volume of Cobalt Strike DNS requests, (ii) Cobalt Strike privilege escalation with the Cobalt Strike built-in service svc-exe, (iii) Cobalt Strike lateral movement with the Cobalt Strike built-in service PsExec and (iv) Cobalt Strike beacons communication through named pipes. We show examples of how to track Cobalt Strike command and control servers (C2) and Malleable profiles by focusing on their SSL certificates and HTTP responses. In this blogpost, we describe step by step how to ensure a proactive and defensive posture against Cobalt Strike, one of the most powerful pentesting tools hijacked by attackers in their numerous campaigns. Here, we are tackling a much bigger threat given the frequency it is abused by diverse threat actors. In the last SEKOIA.IO Threat & Detection Lab we dealt with a Man-in-the-middle (MITM) phishing attack leveraging Evilginx2, an offensive tool allowing two-factor authentication bypass. ![]() Detects when an attacker elevate its privileges using svc-exe and move laterally using PsExec.How can we detect Cobalt Strike with our SIEM?.Keep a close eye on default certificates.This is how we hunt for Cobalt Strike C2 servers.In a few words, how does Cobalt Strike work?.Why should defenders focus on Cobalt Strike hunting and detection ?. ![]()
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