""ET TROJAN Win32/Agent.AAIB Variant CnC""

SID: 2029893

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2020_04_13, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2020_04_13

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: ".jpg"

  • Value: "User-Agent|3a 20|WinHttpClient|0d 0a|"

Within:

PCRE: "/^Connection\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\n(?:\r\n)?$/Hi"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

source