""ET CURRENT_EVENTS Successful Chase Phish 2020-10-14""

SID: 2033007

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_10_14, deployment Perimeter, signature_severity Critical, tag Phishing, updated_at 2020_10_14, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing

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: "userid=" Depth: 7

• Value: "&passid="

• Value: "&Token="

Within:

PCRE: "/^userid=[^&]&passid=[^&]&Token=$/P"

Special Options:

• http_method

• http_client_body

• http_client_body

• fast_pattern

• http_client_body

source