""ET TROJAN DonotGroup Backdoor Activity (POST)""

SID: 2041120

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_11_30, deployment Perimeter, deployment SSLDecrypt, malware_family DonotGroup, signature_severity Major, updated_at 2023_01_04, reviewed_at 2023_09_05

Reference:

• Link

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: ".php"

• Value: "data=" Depth: 5

• Value: "|7c 7c 7c|"

Within: 258

PCRE: "/^Content-Type\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\nContent-Length\x3a\x20[^\r\n]+\r\nCache-Control\x3a\x20[^\r\n]+[\r\n]+$/H"

Special Options:

• http_method

• http_uri

• http_client_body

• fast_pattern

• http_client_body

source