A successful SSO sign-in from TOR

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Hour
Required Data	Requires one of the following data sources: AzureAD OR Azure SignIn Log OR Idira OR Duo OR Okta OR OneLogin OR PingOne
Detection Modules	Identity Analytics
ATT&CK Tactic	Initial Access (TA0001), Command and Control (TA0011)
ATT&CK Technique	Proxy: Multi-hop Proxy (T1090.003), Valid Accounts (T1078)
Severity	High

Description

A successful sign-in from a TOR exit node.

Attacker's Goals

Gain initial access to organization and hiding itself.

Investigative actions

• Block all web traffic to and from public Tor entry and exit nodes.
• Search for additional logins from the same user around the alert timestamp.

Variations

A successful SSO sign-in from TOR via Mobile Device

Synopsis

Field	Value
ATT&CK Tactic	Initial Access (TA0001), Command and Control (TA0011)
ATT&CK Technique	Proxy: Multi-hop Proxy (T1090.003), Valid Accounts (T1078)
Severity	Medium

Description

A successful sign-in from a TOR exit node.

Attacker's Goals

Gain initial access to organization and hiding itself.

Investigative actions

• Block all web traffic to and from public Tor entry and exit nodes.
• Search for additional logins from the same user around the alert timestamp.