WmiPrvSE Spawned A Process

Severity: medium
Author: Roberto Rodriguez @Cyb3rWard0g
Source: upstream

Detects WmiPrvSE spawning a process

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1047` Windows Management Instrumentation

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation
Security-Auditing	4688	A new process has been created.

Stages and Predicates

Stage 1: `selection`

ParentImage|endswith: '\WmiPrvSe.exe'

Stage 2: `not 1 of filter_*`

or:
Image|endswith: '\WerFault.exe'
Image|endswith: '\WmiPrvSE.exe'
LogonId: 0x3e7
LogonId: null
LogonId: null
User|contains: AUTHORI
User|contains: AUTORI

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
`Image`	ends_with	`\WerFault.exe` corpus 8 (sigma 8) `\WmiPrvSE.exe` corpus 3 (sigma 3)
`LogonId`	eq	`0x3e7` corpus 2 (sigma 2) `null`
`ParentImage`	ends_with	`\WmiPrvSe.exe`
`User`	match	`AUTHORI` corpus 16 (sigma 16) `AUTORI` corpus 16 (sigma 16)