""ET TROJAN Backdoor.Elise CnC Beacon 2 M2""

SID: 2025291

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 2018_02_02, deployment Perimeter, malware_family elise, signature_severity Major, tag c2, updated_at 2022_05_03, 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: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "=|3b 20|"

  • Value: "=|3b 20|"

  • Value: "=|3b|"

  • Value: "Cache-Control|3a 20|no-cache|0d 0a|Connection|3a 20|Keep-Alive|0d 0a|Pragma|3a 20|no-cache|0d 0a|Accept|3a 20|"

  • Value: "=|3b 0d 0a|Host|3a|"

Within:

PCRE: "/^\/[a-z]{3,6}\/[a-z]{3,6}.[a-z]{3}$/U"

Special Options:

  • http_method

  • http_cookie

  • http_cookie

  • http_cookie

  • http_header

  • fast_pattern

source