""ET TROJAN Stellar Stealer Data Exfiltration Attempt M2""

SID: 2045767

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_05_18, deployment Perimeter, malware_family Stellar, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_05_18

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: "/index.php"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name|3d 22|uploaded_file|22 3b 20|filename|3d 22|"

  • Value: "Login Data|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a 0d 0a|SQLite format 3"

  • Value: !"Referer|3a 20|"

  • Value: !"User-Agent|3a 20|"

Within:

PCRE: "/filename\x3d\x22[A-Za-z0-9]{8}-/P"

Special Options:

  • http_uri

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_header

  • http_header

source