""ET TROJAN PlanetStealer Data Exfiltration Attempt""

SID: 2051492

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_03_05, deployment Perimeter, malware_family PlanetStealer, performance_impact Low, confidence High, signature_severity Major, tag InfoStealer, tag PlanetStealer, updated_at 2024_03_05

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: "/submit/file"

  • Value: "User-Agent|3a 20|Go-http-client/"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|C|3a 5c 5c|Users|5c 5c|"

  • Value: "|5c 5c|AppData|5c 5c|Local|5c 5c|Temp|5c 5c|"

  • Value: ".zip|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a 0d 0a|PK"

  • Value: "passwords.txt"

  • Value: !"Referer|3a 20|"

Within: 50

PCRE: "/\x5c\x5cAppData\x5c\x5cLocal\x5c\x5cTemp\x5c\x5c[a-zA-Z0-9]{8}-[a-f0-9]{8}-([a-f0-9]{4}-){3}[a-f0-9]{12}/P"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_header

source