Detection rules › Sigma
Potential SmadHook.DLL Sideloading
Detects potential DLL sideloading of "SmadHook.dll", a DLL used by SmadAV antivirus
Known false positives
- Unlikely
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 7: Image loaded |
Rule body
title: Potential SmadHook.DLL Sideloading
id: 24b6cf51-6122-469e-861a-22974e9c1e5b
status: test
description: Detects potential DLL sideloading of "SmadHook.dll", a DLL used by SmadAV antivirus
references:
- https://research.checkpoint.com/2023/malware-spotlight-camaro-dragons-tinynote-backdoor/
- https://www.qurium.org/alerts/targeted-malware-against-crph/
author: X__Junior (Nextron Systems)
date: 2023-06-01
tags:
- attack.persistence
- attack.privilege-escalation
- attack.execution
- attack.stealth
- attack.t1574.001
logsource:
category: image_load
product: windows
detection:
selection:
ImageLoaded|endswith:
- '\SmadHook32c.dll'
- '\SmadHook64c.dll'
filter_main_legit_path:
Image:
- 'C:\Program Files (x86)\SMADAV\SmadavProtect32.exe'
- 'C:\Program Files (x86)\SMADAV\SmadavProtect64.exe'
- 'C:\Program Files\SMADAV\SmadavProtect32.exe'
- 'C:\Program Files\SMADAV\SmadavProtect64.exe'
ImageLoaded|startswith:
- 'C:\Program Files (x86)\SMADAV\'
- 'C:\Program Files\SMADAV\'
condition: selection and not 1 of filter_main_*
falsepositives:
- Unlikely
level: high
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
ImageLoaded|endswith:
- '\SmadHook32c.dll'
- '\SmadHook64c.dll'
Stage 2: not filter_main_legit_path
filter_main_legit_path:
Image:
- 'C:\Program Files (x86)\SMADAV\SmadavProtect32.exe'
- 'C:\Program Files (x86)\SMADAV\SmadavProtect64.exe'
- 'C:\Program Files\SMADAV\SmadavProtect32.exe'
- 'C:\Program Files\SMADAV\SmadavProtect64.exe'
ImageLoaded|startswith:
- 'C:\Program Files (x86)\SMADAV\'
- 'C:\Program Files\SMADAV\'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
Image | eq | C:\Program Files (x86)\SMADAV\SmadavProtect32.exe | excludes:Image field:"Image" value:"C:\Program Files (x86)\SMADAV\SmadavProtect32.exe" |
Image | eq | C:\Program Files (x86)\SMADAV\SmadavProtect64.exe | excludes:Image field:"Image" value:"C:\Program Files (x86)\SMADAV\SmadavProtect64.exe" |
Image | eq | C:\Program Files\SMADAV\SmadavProtect32.exe | excludes:Image field:"Image" value:"C:\Program Files\SMADAV\SmadavProtect32.exe" |
Image | eq | C:\Program Files\SMADAV\SmadavProtect64.exe | excludes:Image field:"Image" value:"C:\Program Files\SMADAV\SmadavProtect64.exe" |
ImageLoaded | starts_with | C:\Program Files (x86)\SMADAV\ | excludes:ImageLoaded field:"ImageLoaded" value:"C:\Program Files (x86)\SMADAV\" |
ImageLoaded | starts_with | C:\Program Files\SMADAV\ | excludes:ImageLoaded field:"ImageLoaded" value:"C:\Program Files\SMADAV\" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ImageLoaded | ends_with |
| field:"ImageLoaded" kind:ends_with |