LCRYX Ransomware AV/FW Defense Dismantling via PowerShell, cmd, and sc

Ibrahim Saud@tektrix

•updated Jun 25, 2026•0•0•2

Detects various methods employed by LCRYX ransomware to disable security software and firewall configurations. The rule identifies suspicious process executions, including PowerShell commands to modify Windows Defender settings, netsh commands to disable firewalls, sc.exe commands to stop security services, and the termination of various antivirus processes (e.g., MsMpEng.exe, avp.exe, bdagent.exe) via taskkill. It specifically monitors these actions when spawned from script hosts like wscript, cscript, or shells like powershell and cmd.