Detection rules › Sigma

Suspicious Execution Location Of Wermgr.EXE

Severity
high
Author
Florian Roth (Nextron Systems)
Source
upstream

Detects suspicious Windows Error Reporting manager (wermgr.exe) execution location.

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation
Security-Auditing4688A new process has been created.

Stages and Predicates

Stage 1: selection

Image|endswith: '\wermgr.exe'

Stage 2: not 1 of filter_main_legit_location

or:
Image|startswith: 'C:\Windows\SysWOW64\'
Image|startswith: 'C:\Windows\System32\'
Image|startswith: 'C:\Windows\WinSxS\'

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.

FieldKindValues
Imageends_with
  • \wermgr.exe corpus 3 (sigma 3)
Imagestarts_with
  • C:\Windows\SysWOW64\ corpus 16 (sigma 16)
  • C:\Windows\System32\ corpus 16 (sigma 16)
  • C:\Windows\WinSxS\ corpus 13 (sigma 13)