Potentially Suspicious DLL Registered Via Odbcconf.EXE

calendar Aug 12, 2024 · attack.defense-evasion attack.t1218.008  ·
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Detects execution of "odbcconf" with the "REGSVR" action where the DLL in question doesn't contain a ".dll" extension. Which is often used as a method to evade defenses.

Sigma rule (View on GitHub)

 1title: Potentially Suspicious DLL Registered Via Odbcconf.EXE
 2id: ba4cfc11-d0fa-4d94-bf20-7c332c412e76
 3related:
 4    - id: 9f0a8bf3-a65b-440a-8c1e-5cb1547c8e70
 5      type: derived
 6status: test
 7description: Detects execution of "odbcconf" with the "REGSVR" action where the DLL in question doesn't contain a ".dll" extension. Which is often used as a method to evade defenses.
 8references:
 9    - https://learn.microsoft.com/en-us/sql/odbc/odbcconf-exe?view=sql-server-ver16
10    - https://lolbas-project.github.io/lolbas/Binaries/Odbcconf/
11    - https://www.trendmicro.com/en_us/research/17/h/backdoor-carrying-emails-set-sights-on-russian-speaking-businesses.html
12author: Nasreddine Bencherchali (Nextron Systems)
13date: 2023-05-22
14tags:
15    - attack.defense-evasion
16    - attack.t1218.008
17logsource:
18    category: process_creation
19    product: windows
20detection:
21    selection_img:
22        - Image|endswith: '\odbcconf.exe'
23        - OriginalFileName: 'odbcconf.exe'
24    selection_cli:
25        # Note: The "/A" flag is not required to call a specific action
26        CommandLine|contains: 'REGSVR '
27    filter_main_dll_ext:
28        CommandLine|contains: '.dll'
29    condition: all of selection_* and not 1 of filter_main_*
30falsepositives:
31    - Unlikely
32level: high

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