""ET POLICY Powershell Command With Execution Bypass Argument Over SMB - Likely Lateral Movement""

SID: 2025723

Revision: 1

Class Type: trojan-activity

Metadata: attack_target SMB_Client, created_at 2018_07_17, deployment Perimeter, deployment Internal, performance_impact Low, signature_severity Major, updated_at 2018_07_17, mitre_tactic_id TA0008, mitre_tactic_name Lateral_Movement, mitre_technique_id T1570, mitre_technique_name Lateral_Tool_Transfer

Reference:

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: $HOME_NET

Destination Port: 445

Flow: established,to_server

Contents:

  • Value: "SMB" Depth: 8

  • Value: "|00|p|00|o|00|w|00|e|00|r|00|s|00|h|00|e|00|l|00|l|00|"

  • Value: "|00|e|00|x|00|e|00|c|00|"

  • Value: "|00|b|00|y|00|p|00|a|00|s|00|s|00|"

Within:

PCRE:

Special Options:

  • nocase

  • fast_pattern

  • nocase

  • nocase

source