""ET TROJAN Possible Gamaredon HEAD Request for .dot file on ddns.net""

SID: 2028967

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_13, deployment Perimeter, signature_severity Major, updated_at 2019_12_17

Reference:

  • md5

  • b221647d110bd2be2c6e9c5d727ca8db

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow:

Contents:

  • Value: "HEAD"

  • Value: ".dot"

  • Value: "User-Agent|3a 20|Microsoft Office"

  • Value: ".ddns.net|0d 0a|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_header

  • fast_pattern

  • http_header

source