""ET CURRENT_EVENTS [Fireeye] Backdoor.HTTP.BEACON.[CSBundle Original Server 3]""

SID: 2031268

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_08, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_12_09, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,from_server

Contents:

  • Value: "{|22|alias|22 3a 22|apx|22|,|22|prefix|22 3a 22 22|,|22|suffix|22 3a|null,|22|suggestions|22 3a|[],|22|responseId|22 3a 22|15QE9JX9CKE2P|22|,|22|addon|22 3a 20 22|"

  • Value: "|22|,|22|shuffled|22 3a|false}"

Within:

PCRE:

Special Options:

  • fast_pattern

source