Detection rules › Sigma
Always Install Elevated Windows Installer
Detects Windows Installer service (msiexec.exe) trying to install MSI packages with SYSTEM privilege
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Privilege Escalation | T1548.002 Abuse Elevation Control Mechanism: Bypass User Account Control |
| Defense Evasion | T1548.002 Abuse Elevation Control Mechanism: Bypass User Account Control |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
Stages and Predicates
Stage 1: 1 of selection_image_1
Image|endswith: tmp
Image|contains: '\Windows\Installer\'
Image|contains: msi
Stage 2: 1 of selection_image_2
IntegrityLevel: [S-1-16-16384, System]
Image|endswith: '\msiexec.exe'
Stage 3: selection_user
or:
User|contains: AUTHORI
User|contains: AUTORI
Stage 4: not 1 of filter_*
or:
CommandLine|endswith: '\system32\msiexec.exe /V'
ParentCommandLine|endswith: '\system32\msiexec.exe /V'
ParentImage: 'C:\Windows\System32\services.exe'
ParentImage|startswith: 'C:\Program Files (x86)\Avast Software\'
ParentImage|startswith: 'C:\Program Files (x86)\Google\Update\'
ParentImage|startswith: 'C:\Program Files\Avast Software\'
ParentImage|startswith: 'C:\Program Files\Google\Update\'
ParentImage|startswith: 'C:\ProgramData\Avira\'
ParentImage|startswith: 'C:\ProgramData\Sophos\'
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 |
|---|---|---|
CommandLine | ends_with |
|
Image | ends_with |
|
Image | match |
|
IntegrityLevel | eq |
|
ParentCommandLine | ends_with |
|
ParentImage | eq |
|
ParentImage | starts_with |
|
User | match |
|