""ET TROJAN Win32/Dorv Stealer Exfiltrating Data to CnC""

SID: 2027087

Revision: 4

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_03_18, deployment Perimeter, malware_family Win32_Dorv, performance_impact Low, signature_severity Major, tag Stealer, updated_at 2019_03_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: "User-Agent|3a 20|Mozilla|2f|3.0"

  • Value: "name=|22|files|22 3b|"

  • Value: "|0d 0a 0d 0a|PK"

  • Value: "|2f|BSSID.txt"

  • Value: "|2f|Screenshot."

  • Value: "|20|HTTP/1.0"

Within:

PCRE: "/.php$/Ui"

Special Options:

  • http_method

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • fast_pattern

source