Detection rules › Sigma
Credential Dumping Attempt Via Svchost
Detects when a process tries to access the memory of svchost to potentially dump credentials.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Privilege Escalation |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 10: ProcessAccess |
Rule body
title: Credential Dumping Attempt Via Svchost
id: 174afcfa-6e40-4ae9-af64-496546389294
status: test
description: Detects when a process tries to access the memory of svchost to potentially dump credentials.
references:
- Internal Research
author: Florent Labouyrie
date: 2021-04-30
modified: 2022-10-09
tags:
- attack.privilege-escalation
- attack.t1548
logsource:
product: windows
category: process_access
detection:
selection:
TargetImage|endswith: '\svchost.exe'
GrantedAccess: '0x143a'
filter_main_known_processes:
SourceImage|endswith:
- '\services.exe'
- '\msiexec.exe'
condition: selection and not 1 of filter_main_*
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
TargetImage|endswith: '\svchost.exe'
GrantedAccess: '0x143a'
Stage 2: not filter_main_known_processes
filter_main_known_processes:
SourceImage|endswith:
- '\services.exe'
- '\msiexec.exe'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
SourceImage | ends_with | \msiexec.exe | excludes:SourceImage field:"SourceImage" value:"\msiexec.exe" |
SourceImage | ends_with | \services.exe | excludes:SourceImage field:"SourceImage" value:"\services.exe" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
GrantedAccess | eq |
| field:"GrantedAccess" kind:eq value:"0x143a" |
TargetImage | ends_with |
| field:"TargetImage" kind:ends_with value:"\svchost.exe" |