Detection rules › Sigma
Secretdump password dumping via SMB admin share
Detects scenarios where an attacker execute Secretdump in order to remotely dump credentials over SMB.
Known false positives
- none
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access |
Telemetry coverage
Rule body
title: Secretdump password dumping via SMB admin share
description: Detects scenarios where an attacker execute Secretdump in order to remotely dump credentials over SMB.
references:
- https://github.com/mdecrevoisier/EVTX-to-MITRE-Attack/tree/master/TA0006-Credential%20Access/T1003-Credential%20dumping
- https://riccardoancarani.github.io/2020-05-10-hunting-for-impacket/
- https://airman604.medium.com/dumping-active-directory-password-hashes-deb9468d1633
- https://medium.com/@benichmt1/secretsdump-demystified-bfd0f933dd9b
tags:
- attack.credential_access
- attack.t1003.002
author: mdecrevoisier
status: experimental
logsource:
product: windows
service: security
detection:
selection:
EventID: 5145
ShareName: '\\*\ADMIN$'
RelativeTargetName|startswith: SYSTEM32
RelativeTargetName|endswith: '.tmp' # example: 'SYSTEM32\NMdzZfem.tmp'
condition: selection
falsepositives:
- none
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
EventID: 5145
ShareName: '\\*\ADMIN$'
RelativeTargetName|startswith: SYSTEM32
RelativeTargetName|endswith: '.tmp'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
RelativeTargetName | ends_with |
| field:"RelativeTargetName" kind:ends_with value:".tmp" |
RelativeTargetName | starts_with |
| field:"RelativeTargetName" kind:starts_with value:"SYSTEM32" |
ShareName | wildcard |
| field:"ShareName" kind:wildcard value:"\\*\ADMIN$" |