Arbitrary File Download Via MSOHTMED.EXE

Detects usage of "MSOHTMED" to download arbitrary files

Sigma rule (View on GitHub)

 1title: Arbitrary File Download Via MSOHTMED.EXE
 2id: 459f2f98-397b-4a4a-9f47-6a5ec2f1c69d
 3status: test
 4description: Detects usage of "MSOHTMED" to download arbitrary files
 5references:
 6    - https://github.com/LOLBAS-Project/LOLBAS/pull/238/files
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2022-08-19
 9modified: 2023-11-09
10tags:
11    - attack.defense-evasion
12    - attack.execution
13    - attack.t1218
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection_img:
19        - Image|endswith: '\MSOHTMED.exe'
20        - OriginalFileName: 'MsoHtmEd.exe'
21    selection_cli:
22        CommandLine|contains:
23            - 'ftp://'
24            - 'http://'
25            - 'https://'
26    condition: all of selection_*
27falsepositives:
28    - Unknown
29level: medium

References

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