""ET TROJAN FIN12 Related WHITEDAGGER/Cobalt Strike Beacon Activity (GET)""

SID: 2034185

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_10_13, deployment Perimeter, deployment SSLDecrypt, malware_family CobaltStrike, malware_family Fin12, signature_severity Major, tag c2, updated_at 2021_10_13, 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: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "GET|20|/files/remove.gif|20|HTTP/1.1"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+\r\nAccept\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20[^\r\n]+\r\nConnection\x3a\x20[^\r\n]+\r\nCache-Control\x3a\x20[^\r\n]+[\r\n]+$/H"

Special Options:

• fast_pattern

source