Danny Y
@zendannyyTrusted contributorCompletionist
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375 detections
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Hunting rule loosely modeled after Atomic Red Team T1112 test "Disable Windows Shutdown Button". No public in-the-wild intel reference available; correlate before alerting.
Detects reads of HKLM\SYSTEM\CurrentControlSet\Control\SystemStartOptions, the value that stores boot parameters (e.g. NOEXECUTE=OPTIN vs SAFEBOOT:MINIMAL). Ransomware including Snatch and Qilin query this key to determine whether the host is already in Safe Mode before forcing a reboot and encrypting with AV/EDR unloaded.
Treat as a high-interest hunting lead when paired within minutes with Safe Mode staging:
bcdedit /set safeboot, reg add under SafeBoot\Minimal or SafeBoot\Network, or
shutdown /r.
Treat as a high-interest hunting lead when paired within minutes with Safe Mode staging:
bcdedit /set safeboot, reg add under SafeBoot\Minimal or SafeBoot\Network, or
shutdown /r.
Detects BPFDoor-style iptables NAT REDIRECT rules used to tunnel traffic from a
legitimate service port to a high ephemeral shell port (42391-43390) without
disrupting the real service for other clients. BPFDoor activates on magic packets, spawns a
bind shell, inserts short-lived PREROUTING redirects for the controller IP, then deletes them.
legitimate service port to a high ephemeral shell port (42391-43390) without
disrupting the real service for other clients. BPFDoor activates on magic packets, spawns a
bind shell, inserts short-lived PREROUTING redirects for the controller IP, then deletes them.
Hunting rule for T1197 "Bitsadmin Download (cmd)". No public in-the-wild intel reference available; correlate before alerting.
Hunting rule for Atomic Red Team T1490 test "Windows - Disable the SR scheduled task". Correlate before alerting.
Hunting rule for Atomic Red Team T1490 test "Windows - Disable the SR scheduled task". Correlate before alerting.
Hunting rule loosely modeled after Atomic Red Team T1112 test "Disable Windows Shutdown Button". No public in-the-wild intel reference available; correlate before alerting.
Hunting rule loosely modeled after Atomic Red Team T1112 test "Disable Windows Change Password Feature". No public in-the-wild intel reference available; correlate before alerting.
Hunting rule for Atomic Red Team T1112 test "Disable Windows Registry Tool" (Modify Registry). Correlate with additional signals before alerting.
Linux BPFDoor iptables Redirect
Gravwell
Detects BPFDoor-style iptables NAT REDIRECT rules used to tunnel traffic from a
legitimate service port to a high ephemeral shell port (42391-43390) without
disrupting the real service for other clients. BPFDoor activates on magic packets, spawns a bind shell, inserts short-lived PREROUTING redirects for the controller IP, then deletes them.
legitimate service port to a high ephemeral shell port (42391-43390) without
disrupting the real service for other clients. BPFDoor activates on magic packets, spawns a bind shell, inserts short-lived PREROUTING redirects for the controller IP, then deletes them.
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