""ET TROJAN TA402/Molerats Pierogi Backdoor Activity""

SID: 2029431

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_13, deployment Perimeter, malware_family Molerats, signature_severity Major, updated_at 2020_02_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: "POST"

  • Value: "cname=" Depth: 6

  • Value: "&av="

  • Value: "&osversion="

  • Value: "&aname="

  • Value: "&ver="

  • Value: !"Referer|3a 20|"

  • Value: !"User-Agent|3a 20|"

Within: 50

PCRE: "/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})/P"

Special Options:

  • http_method

  • http_client_body

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_header

  • http_header

source