Detection rules › Sigma
Suspicious Remote Child Process From Outlook
Detects a suspicious child process spawning from Outlook where the image is located in a remote location (SMB/WebDav shares).
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Suspicious Remote Child Process From Outlook
id: e212d415-0e93-435f-9e1a-f29005bb4723
related:
- id: 208748f7-881d-47ac-a29c-07ea84bf691d # Outlook Child Processes
type: similar
status: test
description: Detects a suspicious child process spawning from Outlook where the image is located in a remote location (SMB/WebDav shares).
references:
- https://github.com/sensepost/ruler
- https://www.fireeye.com/blog/threat-research/2018/12/overruled-containing-a-potentially-destructive-adversary.html
- https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=49
author: Markus Neis, Nasreddine Bencherchali (Nextron Systems)
date: 2018-12-27
modified: 2023-02-09
tags:
- attack.execution
- attack.stealth
- attack.t1059
- attack.t1202
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith: '\outlook.exe'
Image|startswith: '\\\\'
condition: selection
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
ParentImage|endswith: '\outlook.exe'
Image|startswith: '\\\\'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | starts_with |
| field:"Image" kind:starts_with value:"\\\\" |
ParentImage | ends_with |
| field:"ParentImage" kind:ends_with value:"\outlook.exe" |