Potential Pass-the-Hash (PtH) Attempt

Author: Elastic
Source: upstream

Adversaries may pass the hash using stolen password hashes to move laterally within an environment, bypassing normal system access controls. Pass the hash (PtH) is a method of authenticating as a user without having access to the user's cleartext password.

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1550` Use Alternate Authentication Material, `T1550.002` Use Alternate Authentication Material: Pass the Hash
Lateral Movement	`T1550` Use Alternate Authentication Material, `T1550.002` Use Alternate Authentication Material: Pass the Hash

Event coverage

Provider	Event ID	Title
Security-Auditing	4624	An account was successfully logged on.

Stages and Predicates

Stage 1: `kql:new_terms`

(user.id:"S-1-12-1-*" or user.id:"S-1-5-21-*") and event.action:"logged-in" and event.category:"authentication" and event.outcome:"success" and winlog.event_data.LogonProcessName:"seclogo" and winlog.logon.type:"NewCredentials"

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`event.action`	eq	`logged-in` corpus 7 (elastic 7)
`event.category`	eq	`authentication` corpus 5 (elastic 5)
`event.outcome`	eq	`success` corpus 8 (elastic 8)
`user.id`	wildcard	`S-1-12-1-` corpus 3 (elastic 3) `S-1-5-21-` corpus 3 (elastic 3)
`winlog.event_data.LogonProcessName`	eq	`seclogo` corpus 3 (sigma 2, elastic 1)
`winlog.logon.type`	eq	`NewCredentials`

Neighbors

Broader alternatives (more inclusive than this rule)

These rules match a superset of what this rule catches. They cover the same events plus more. Use them if you want wider coverage and can absorb more false positives.

Potential Account Takeover - Mixed Logon Types [elastic] (drops 6 filters this rule applies) (first-stage match only; downstream stages may differ)
Potential Account Takeover - Logon from New Source IP [elastic] (drops 6 filters this rule applies) (first-stage match only; downstream stages may differ)