""ET TROJAN TrueBot/Silence.Downlaoder Screenshot Post M1""

SID: 2039120

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_10_07, deployment Perimeter, malware_family TrueBot, signature_severity Major, updated_at 2022_10_07

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: ".php"

  • Value: "|0d 0a|Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|fileToUpload|22 3b 20|filename|3d 22|"

  • Value: "Content|2d|Type|3a 20|application|2f|octet|2d|stream|0d 0a 0d 0a 89 50 4e 47 0d 0a 1a 0a|"

Within:

PCRE: "/fileToUpload\x22\x3b\x20filename\x3d\x22[a-f0-9]{8}-[a-f0-9]{8}\x22\x0d\x0a/P"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

source