""ET TROJAN Win32/PackedFlyStudio.AA CnC Activity (GET)""

SID: 2051640

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_03_13, deployment Perimeter, confidence Medium, signature_severity Major, updated_at 2024_03_13

Reference:

  • md5

  • 4dd98e7e42415cd8e773bb2a9eda006e

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: "User-Agent|3a 20|HTTPREAD|0d 0a|"

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\nCache-Control[^\r\n]+[\r\n][\r\n]/H"

Special Options:

  • http_method

  • http_header

source