""ET TROJAN PS1/Kimsuky CnC Exfil (POST)""

SID: 2046892

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 2023_07_25, deployment Perimeter, malware_family Kimsuky, confidence High, signature_severity Critical, updated_at 2023_07_25

Reference:

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: "User-Agent|3a 20|Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|x|3b 20|Win64|3b 20|x64|29 20|AppleWebKit|2f|537|2e|36|20 28|KHTML|2c 20|like|20|Gecko|29 20|Chremo|2f|87|2e|0|2e|4280|2e|141|20|Safari|2f|537|2e|36|20|Edgo|2f|87|2e|0|2e|664|2e|75|0d 0a|"

  • Value: "Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|MAX|5f|FILE|5f|SIZE|22 0d 0a|1000000"

Within:

PCRE: "/.php$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_client_body

source