Potential RjvPlatform.DLL Sideloading From Non-Default Location

Status: test
Severity: high
Log source: category image_load, product windows
Author: X__Junior (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects potential DLL sideloading of "RjvPlatform.dll" by "SystemResetPlatform.exe" located in a non-default location.

Known false positives

Unlikely

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1574.001` Hijack Execution Flow: DLL
Stealth	`T1574.001` Hijack Execution Flow: DLL

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 7: Image loaded

Rule body

title: Potential RjvPlatform.DLL Sideloading From Non-Default Location
id: 0e0bc253-07ed-43f1-816d-e1b220fe8971
status: test
description: Detects potential DLL sideloading of "RjvPlatform.dll" by "SystemResetPlatform.exe" located in a non-default location.
references:
    - https://twitter.com/0gtweet/status/1666716511988330499
author: X__Junior (Nextron Systems)
date: 2023-06-09
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith: '\RjvPlatform.dll'
        Image: '\SystemResetPlatform.exe'
    filter_main_legit_path:
        Image|startswith: 'C:\Windows\System32\SystemResetPlatform\'
    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: '\RjvPlatform.dll'
    Image: '\SystemResetPlatform.exe'

Stage 2: `not filter_main_legit_path`

filter_main_legit_path:
    Image|startswith: 'C:\Windows\System32\SystemResetPlatform\'

Exclusions

The rule actively suppresses these predicates.

Field	Kind	Excluded values	Search
`Image`	starts_with	`C:\Windows\System32\SystemResetPlatform\`	`excludes:Image` `field:"Image" value:"C:\Windows\System32\SystemResetPlatform\"`

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`Image`	eq	`\SystemResetPlatform.exe`	`field:"Image" kind:eq value:"\SystemResetPlatform.exe"`
`ImageLoaded`	ends_with	`\RjvPlatform.dll`	`field:"ImageLoaded" kind:ends_with value:"\RjvPlatform.dll"`