""ET TROJAN Suspected Chinese Based APT Malware Retrieving File (GET)""

SID: 2038751

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_09_07, deployment Perimeter, deployment SSLDecrypt, malware_family TontoTeam, signature_severity Major, updated_at 2022_09_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: "GET"

  • Value: "/v1/disk/resources/download?path=" Depth: 33

  • Value: "/a.psd"

  • Value: "Host|3a 20|cloud-api.yandex.net|0d 0a|"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+\r\nAccept\x3a\x20[^\r\n]+\r\nAuthorization\x3a\x20[^\r\n]+[\r\n]+$/H"

Special Options:

  • http_method

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

source