""ET TROJAN MSIL/InfoStealer Variant Activity (POST)""

SID: 2039512

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_10_24, deployment Perimeter, deployment SSLDecrypt, signature_severity Major, updated_at 2022_10_24

Reference:

  • md5

  • 0c6320d07c1d933dfecf6d6104ed7f99

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: "|2f 2f|data.php|20|"

  • Value: "|5b|" Depth: 1

Within:

PCRE: "/^Content-Type[^\r\n]+\r\nHost[^\r\n]+\r\nContent-Length[^\r\n]+\r\nExpect[^\r\n]+\r\n\r\n$/Hm"

Special Options:

  • http_method

  • fast_pattern

  • http_client_body

source