""ET TROJAN Win32/Coldstealer Sending System Information (POST)""

SID: 2039040

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_09_29, signature_severity Major, updated_at 2022_09_29

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: "PK" Depth: 2

  • Value: "Information.txt"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+\r\nContent-Length\x3a\x20[^\r\n]+\r\nExpect\x3a\x20[^\r\n]+\r\nConnection\x3a\x20[^\r\n]+[\r\n]+$/H"

Special Options:

  • http_method

  • http_client_body

  • fast_pattern

  • http_client_body

source