detection

alert tcp $HOME_NET any -> $HOME_NET 445 (
  msg:"Possible SMB lateral movement enumeration";
  flow:to_server,established;
  content:"|FF|SMB"; depth:4;
  threshold:type both, track by_src, count 15, seconds 60;
  sid:1000001; rev:1;

Suricata IDS rule authoring for suspicious lateral movement

suricata ids detection

by Kai Nakamura 1 tab

plaintext

index=auth sourcetype=linux_secure "Failed password" | stats count by src_ip, user | where count > 20
index=proxy "POST" url="*/oauth/token" | stats count by client_ip | where count > 100
index=endpoint process_name=powershell.exe command_line="*EncodedCommand*"

Threat hunting query ideas mapped to MITRE ATT and CK patterns

threat-hunting mitre-attck siem

by Kai Nakamura 1 tab