""ET TROJAN Win32/Farfli.CUY CnC Server Response""

SID: 2035879

Revision: 1

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_08, deployment Perimeter, signature_severity Major, tag c2, updated_at 2022_04_08, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

• md5

• c99397d66e49e2def1b17f57cd0c5fb9

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

• Value: "|68 78 20 10 00 00 00 01 00 00 00 01 00 00 00 11|" Depth: 16

Within:

PCRE:

Special Options:

• fast_pattern

source