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Detection rules › Sigma

MsiExec Web Install

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

Detects suspicious msiexec process starts with web addresses as parameter

Known false positives

  • False positives depend on scripts and administrative tools used in the monitored environment

MITRE ATT&CK coverage

TacticTechniques
Stealth
Command & Control

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 1: Process creation
Security-AuditingEvent ID 4688: A new process has been created.

Rule body

title: MsiExec Web Install
id: f7b5f842-a6af-4da5-9e95-e32478f3cd2f
related:
    - id: 8150732a-0c9d-4a99-82b9-9efb9b90c40c
      type: similar
status: test
description: Detects suspicious msiexec process starts with web addresses as parameter
references:
    - https://blog.trendmicro.com/trendlabs-security-intelligence/attack-using-windows-installer-msiexec-exe-leads-lokibot/
author: Florian Roth (Nextron Systems)
date: 2018-02-09
modified: 2022-01-07
tags:
    - attack.stealth
    - attack.t1218.007
    - attack.command-and-control
    - attack.t1105
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - ' msiexec'
            - '://'
    condition: selection
falsepositives:
    - False positives depend on scripts and administrative tools used in the monitored environment
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    CommandLine|contains|all:
        - ' msiexec'
        - '://'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • msiexec corpus 2 (sigma 2)
  • :// corpus 3 (sigma 3)
field:"CommandLine" kind:match