1200KM / sigma-rule
Potential Process Injection Via Msra.EXE — Sigma Rule
Sigma rule 744a188b-0415-4792-896f-11ddb0588dbc. Potential Process Injection Via Msra.EXE — Sigma Rule. Detects potential process injection via Microsoft Remote Asssistance (Msra.exe) by looking at suspicious child processes spawned from the aforementioned process. It has been a target used by many threat actors and used for discovery and persistence tactics
Rule metadata and linked tags
Author: Alexander McDonald. Source status: test; severity: high. Source dates: 2022-06-24 / 2023-02-03.
{
"category": "process_creation",
"product": "windows"
}Pinned original Sigma rule · Detection Rule License 1.1
Source SHA-256: bf0374a75e52d4dd6b415f009afc3c914132349ec17c99403b0dddab01245c1c
Detection logic
Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.
title: Potential Process Injection Via Msra.EXE
id: 744a188b-0415-4792-896f-11ddb0588dbc
status: test
description: Detects potential process injection via Microsoft Remote Asssistance (Msra.exe) by looking at suspicious child processes spawned from the aforementioned process. It has been a target used by many threat actors and used for discovery and persistence tactics
references:
- https://www.microsoft.com/security/blog/2021/12/09/a-closer-look-at-qakbots-latest-building-blocks-and-how-to-knock-them-down/
- https://www.fortinet.com/content/dam/fortinet/assets/analyst-reports/ar-qakbot.pdf
author: Alexander McDonald
date: 2022-06-24
modified: 2023-02-03
tags:
- attack.privilege-escalation
- attack.stealth
- attack.t1055
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith: '\msra.exe'
ParentCommandLine|endswith: 'msra.exe'
Image|endswith:
- '\arp.exe'
- '\cmd.exe'
- '\net.exe'
- '\netstat.exe'
- '\nslookup.exe'
- '\route.exe'
- '\schtasks.exe'
- '\whoami.exe'
condition: selection
falsepositives:
- Legitimate use of Msra.exe
level: high
False positives
- Legitimate use of Msra.exe
Source references
Connected ecosystem references
Exact source-tagged techniques
Telemetry review
Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.
Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.