""ET TROJAN MSIL/Crimson Rat CnC Exfil""

SID: 2036241

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_18, deployment Perimeter, malware_family Crimson, signature_severity Major, tag c2, updated_at 2022_04_18, reviewed_at 2023_10_04, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

• Link

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|ent4rme" Depth: 10 Offset: 2

• Value: "|20 7c 20|"

• Value: "|23|runtimebroker"

Within:

PCRE:

Special Options:

• fast_pattern

source