""ET CURRENT_EVENTS Successful IRS Credential Phish 2022-04-25""

SID: 2036362

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 2022_04_25, deployment Perimeter, signature_severity Major, updated_at 2022_04_29

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: "/geoAPIChecker/geochecker.php"

  • Value: "Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|ai|22|"

  • Value: "Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|pr|22|"

  • Value: "WebKitFormBoundary"

Within:

PCRE: "/^Content-Type\x3a\x20[^\r\n]+WebKitFormBoundary/Hmi"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_header

source