""ET TROJAN Win32/Tofsee Connectivity Check M2""

SID: 2033324

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_07_15, deployment Perimeter, signature_severity Major, updated_at 2021_07_15

Reference:

  • md5

  • cc171ee77dc2d657e0c018fcad17608f

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "/proxy.php"

  • Value: "User-Agent|3a 20|Mozilla/5.0 |28|Windows NT 10.0|3b 20|Win64|3b 20|x64|29 20|AppleWebKit/537.36 |28|KHTML, like Gecko|29 20|Chrome/90.0.4430.85 Safari/537.36 OPR/76.0.4017.94|0d 0a|"

  • Value: "zennolab.com|0d 0a|"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+zennolab.com/Hmi"

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_header

  • http_header

  • http_header

source