sigmahighHunting

Potentially Suspicious DLL Registered Via Odbcconf.EXE

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.

MITRE ATT&CK

T1218.008

defense-evasion

Detection Query

selection_img:
  - Image|endswith: \odbcconf.exe
  - OriginalFileName: odbcconf.exe
selection_cli:
  CommandLine|contains: "REGSVR "
filter_main_dll_ext:
  CommandLine|contains: .dll
condition: all of selection_* and not 1 of filter_main_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-05-22

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1218.008

Raw Content

title: Potentially Suspicious DLL Registered Via Odbcconf.EXE
id: ba4cfc11-d0fa-4d94-bf20-7c332c412e76
related:
    - id: 9f0a8bf3-a65b-440a-8c1e-5cb1547c8e70
      type: derived
status: test
description: 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.
references:
    - https://learn.microsoft.com/en-us/sql/odbc/odbcconf-exe?view=sql-server-ver16
    - https://lolbas-project.github.io/lolbas/Binaries/Odbcconf/
    - https://www.trendmicro.com/en_us/research/17/h/backdoor-carrying-emails-set-sights-on-russian-speaking-businesses.html
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-22
tags:
    - attack.defense-evasion
    - attack.t1218.008
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\odbcconf.exe'
        - OriginalFileName: 'odbcconf.exe'
    selection_cli:
        # Note: The "/A" flag is not required to call a specific action
        CommandLine|contains: 'REGSVR '
    filter_main_dll_ext:
        CommandLine|contains: '.dll'
    condition: all of selection_* and not 1 of filter_main_*
falsepositives:
    - Unlikely
level: high