""ET TROJAN BunnyLoader Data Exfiltration Attempt""

SID: 2048405

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, created_at 2023_10_04, deployment Perimeter, malware_family BunnyLoader, performance_impact Low, confidence High, updated_at 2023_11_15, reviewed_at 2023_10_11

Reference:

  • md5

  • dbf727e1effc3631ae634d95a0d88bf3

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: "/Bunny/Uploader.php"

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

  • Value: "filename|3d 22|BunnyLogs_"

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

  • Value: "Information.txt"

Within: 200

PCRE: "/BunnyLogs_[A-Z0-9]{4,8}.zip/P"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_client_body

  • http_client_body

source