Potential Windows Defender AV Bypass Via Dump64.EXE Rename

 1title: Potential Windows Defender AV Bypass Via Dump64.EXE Rename
 2id: 129966c9-de17-4334-a123-8b58172e664d
 3status: test
 4description: |
 5    Detects when a user is potentially trying to bypass the Windows Defender AV by renaming a tool to dump64.exe and placing it in the Visual Studio folder.
 6    Currently the rule is covering only usage of procdump but other utilities can be added in order to increase coverage.    
 7references:
 8    - https://twitter.com/mrd0x/status/1460597833917251595
 9author: Austin Songer @austinsonger, Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
10date: 2021-11-26
11modified: 2024-06-21
12tags:
13    - attack.credential-access
14    - attack.t1003.001
15logsource:
16    product: windows
17    category: process_creation
18detection:
19    selection_dump:
20        Image|startswith: ':\Program Files'
21        Image|contains: '\Microsoft Visual Studio\'
22        Image|endswith: '\dump64.exe'
23    selection_tools_procdump:
24        - OriginalFileName: 'procdump'
25        - CommandLine|contains:
26              - ' -ma ' # Full Dump
27              - ' -mp ' # Mini Plus
28    condition: selection_dump and 1 of selection_tools_*
29falsepositives:
30    - Unknown
31level: high