""ET TROJAN Win32/SiMay RAT Activity (GET)""

SID: 2036600

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_05_17, deployment Perimeter, malware_family SiMayRAT, signature_severity Major, updated_at 2022_05_17

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: "note.youdao.com"

  • Value: "&shareKey=cfae45c9e7cc8a7734b72abe98235dd1 HTTP/1.0|0d 0a|"

Within:

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

Special Options:

  • http_method

  • http_header

  • fast_pattern

source