""ET TROJAN LNK/Sherlock Stealer Host Process List Exfil (POST)""

SID: 2048462

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 2023_10_05, deployment Perimeter, confidence High, signature_severity Critical, updated_at 2023_10_05, reviewed_at 2023_10_05

Reference:

  • md5

  • cf04717ce48e75793d8548d7fbeaba30

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: "|20|System|20|Idle|20|ProcessSystemsmss|2e|execsrss|2e|exe"

  • Value: "WinHttp.WinHttpRequest."

  • Value: "Content-Length|3a 20|0|0d 0a|"

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+WinHttp.WinHttpRequest./Hmi"

Special Options:

  • http_method

  • http_header

  • http_header

  • http_header

source