""ET CURRENT_EVENTS [Fireeye] Backdoor.SSL.BEACON.[CSBundle Ajax]""

SID: 2031299

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 2020_12_08, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_12_08, 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: 443

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "|16|"

  • Value: "|0b|"

  • Value: "|06 03 55 04 06|"

  • Value: "|02|US"

  • Value: "|06 03 55 04 08|"

  • Value: "|02|WA"

  • Value: "|06 03 55 04 07|"

  • Value: "|07|Seattle"

  • Value: "|06 03 55 04 0a|"

  • Value: "|09|Microsoft"

  • Value: "|06 03 55 04 0b|"

  • Value: "|18|Information Technologies"

  • Value: "|06 03 55 04 03|"

  • Value: "|12|ajax.microsoft.com"

  • Value: "|06 03 55 04 06|"

  • Value: "|02|US"

  • Value: "|06 03 55 04 08|"

  • Value: "|02|WA"

  • Value: "|06 03 55 04 07|"

  • Value: "|07|Seattle"

  • Value: "|06 03 55 04 0a|"

  • Value: "|09|Microsoft"

  • Value: "|06 03 55 04 0b|"

  • Value: "|18|Information Technologies"

  • Value: "|06 03 55 04 03|"

  • Value: "|12|ajax.microsoft.com"

Within: 19

PCRE:

Special Options:

  • fast_pattern

source