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Detection rules › Sigma

Driver/DLL Installation Via Odbcconf.EXE

Status
test
Severity
medium
Log source
category process_creation, product windows
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects execution of "odbcconf" with "INSTALLDRIVER" which installs a new ODBC driver. Attackers abuse this to install and run malicious DLLs.

Known false positives

  • Legitimate driver DLLs being registered via "odbcconf" will generate false positives. Investigate the path of the DLL and its contents to determine if the action is authorized.

MITRE ATT&CK coverage

TacticTechniques
Stealth

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 1: Process creation

Rule body

title: Driver/DLL Installation Via Odbcconf.EXE
id: 3f5491e2-8db8-496b-9e95-1029fce852d4
related:
    - id: cb0fe7c5-f3a3-484d-aa25-d350a7912729
      type: similar
status: test
description: Detects execution of "odbcconf" with "INSTALLDRIVER" which installs a new ODBC driver. Attackers abuse this to install and run malicious DLLs.
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Odbcconf/
    - https://web.archive.org/web/20191023232753/https://twitter.com/Hexacorn/status/1187143326673330176
    - https://www.hexacorn.com/blog/2020/08/23/odbcconf-lolbin-trifecta/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-22
tags:
    - attack.stealth
    - 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|all:
            - 'INSTALLDRIVER '
            - '.dll'
    condition: all of selection_*
falsepositives:
    - Legitimate driver DLLs being registered via "odbcconf" will generate false positives. Investigate the path of the DLL and its contents to determine if the action is authorized.
level: medium

Stages and Predicates

Stage 0: condition

all of selection_*

Stage 1: selection_img

selection_img:
    - Image|endswith: '\odbcconf.exe'
    - OriginalFileName: 'odbcconf.exe'

Stage 2: selection_cli

selection_cli:
    CommandLine|contains|all:
        - 'INSTALLDRIVER '
        - '.dll'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • .dll corpus 16 (sigma 16)
  • INSTALLDRIVER corpus 2 (sigma 2)
field:"CommandLine" kind:match
Imageends_with
  • \odbcconf.exe corpus 11 (sigma 11)
field:"Image" kind:ends_with value:"\odbcconf.exe"
OriginalFileNameeq
  • odbcconf.exe corpus 12 (sigma 9, elastic 3)
field:"OriginalFileName" kind:eq value:"odbcconf.exe"