""ET TROJAN Lunar Builder Exfil Attempt""

SID: 2032878

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 2021_04_27, deployment Perimeter, deployment SSLDecrypt, malware_family Lunar_Builder, performance_impact Low, signature_severity Major, updated_at 2021_04_27

Reference:

  • md5

  • 4a07860c39171b71ca0aa359b0185f33

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: "Content-Disposition|3a 20|form-data|3b 20|name=|22|account|22 3b 20|filename=|22|"

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

Within:

PCRE:

Special Options:

  • http_method

  • http_client_body

  • fast_pattern

  • http_client_body

source