Msiexec Quiet Installation

Adversaries may abuse msiexec.exe to proxy execution of malicious payloads. Msiexec.exe is the command-line utility for the Windows Installer and is thus commonly associated with executing installation packages (.msi)

Sigma rule (View on GitHub)

 1title: Msiexec Quiet Installation
 2id: 79a87aa6-e4bd-42fc-a5bb-5e6fbdcd62f5
 3status: test
 4description: |
 5    Adversaries may abuse msiexec.exe to proxy execution of malicious payloads.
 6    Msiexec.exe is the command-line utility for the Windows Installer and is thus commonly associated with executing installation packages (.msi)    
 7references:
 8    - https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/msiexec
 9    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218.007/T1218.007.md
10    - https://twitter.com/_st0pp3r_/status/1583914244344799235
11author: frack113
12date: 2022/01/16
13modified: 2023/03/23
14tags:
15    - attack.defense_evasion
16    - attack.t1218.007
17logsource:
18    category: process_creation
19    product: windows
20detection:
21    selection_img:
22        - Image|endswith: '\msiexec.exe'
23        - OriginalFileName: 'msiexec.exe'
24    selection_cli:
25        # Note that there is no space before and after the arguments because it's possible to write a commandline as such
26        # Example: msiexec -q/i [MSI Package]
27        CommandLine|contains:
28            - '/i'
29            - '-i'
30            - '/package'
31            - '-package'
32            - '/a'
33            - '-a'
34            - '/j'
35            - '-j'
36    selection_quiet:
37        CommandLine|contains:
38            - '/q'
39            - '-q'
40    filter_user_temp:
41        # The %temp% is a very common location for installers
42        ParentImage|startswith: 'C:\Users\'
43        ParentImage|contains: '\AppData\Local\Temp\'
44    filter_system_temp:
45        ParentImage|startswith: 'C:\Windows\Temp\'
46    filter_ccm:
47        ParentImage: 'C:\Windows\CCM\Ccm32BitLauncher.exe'
48        IntegrityLevel: 'System'
49    condition: all of selection_* and not 1 of filter_*
50falsepositives:
51    - WindowsApps installing updates via the quiet flag
52level: medium

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