""ET TROJAN Win32/NitroStealer/exoStub CnC Exfil""

SID: 2032417

Revision: 3

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_02, deployment Perimeter, signature_severity Major, updated_at 2021_09_14

Reference:

  • md5

  • 3594572488e00679a144001e24c675ab

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: ".php"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name=|22|file|22 3b 20|filename=|22|Upload.zip|22 0d 0a|"

  • Value: "screenshot"

  • Value: !"Referer|3a 20|"

  • Value: !"User-Agent|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • nocase

  • http_client_body

  • nocase

  • http_client_body

  • http_header

  • http_header

source