""ET TROJAN Win32/Fewin Stealer Data Exfiltration Attempt""

SID: 2049140

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, created_at 2023_11_09, deployment Perimeter, malware_family Stealer, confidence High, signature_severity Major, updated_at 2024_01_10, mitre_tactic_id TA0009, mitre_tactic_name Collection, mitre_technique_id T1005, mitre_technique_name Data_from_local_system

Reference:

  • md5

  • abceb35cf20f22fd8a6569a876e702cb

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: "/Up/b"

  • Value: "Content-Type|3a 20|application/octet-stream|3b 20|boundary|3d 2d 2d 2d 2d|"

  • Value: "PK" Depth: 2

  • Value: "1/0/cert"

Within: 100

PCRE: "/^\/Up\/b$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_client_body

  • http_client_body

  • fast_pattern

source