""ET TROJAN Win32/CrimsonRAT Activity (Outbound)""

SID: 2044148

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_02_08, deployment Perimeter, malware_family CrimsonRAT, performance_impact Significant, confidence High, signature_severity Major, updated_at 2023_02_08

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 1024:

Flow: established,to_server

Contents:

  • Value: "|00 00 00 00|" Depth: 4 Offset: 1

  • Value: "|79 32|"

  • Value: "|3d|"

  • Value: "|7c 7c|"

  • Value: "|3e|"

  • Value: "|7c 7c 43 3a 5c 55 73 65 72 73 5c|"

Within: 11

PCRE:

Special Options:

  • fast_pattern

source