IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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MsiExec Service Child Process With Network Connection

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MsiExec Service Child Process With Network Connection

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Identifies the execution of an MsiExec service child process followed by network or dns lookup activity. Adversaries may abuse Windows Installers for initial access and delivery of malware.

Rule type: eql

Rule indices:

logs-endpoint.events.process-*
logs-endpoint.events.network-*
logs-windows.sysmon_operational-*
logs-sentinel_one_cloud_funnel.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

Domain: Endpoint
OS: Windows
Use Case: Threat Detection
Tactic: Defense Evasion
Data Source: Elastic Defend
Data Source: Sysmon
Data Source: SentinelOne

Version: 101

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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sequence by process.entity_id with maxspan=1m
 [process where host.os.type == "windows" and event.type : "start" and
  process.parent.name : "msiexec.exe" and process.parent.args : "/v" and
  not process.executable :
        ("?:\\Windows\\System32\\msiexec.exe",
         "?:\\Windows\\sysWOW64\\msiexec.exe",
         "?:\\Windows\\system32\\srtasks.exe",
         "?:\\Windows\\syswow64\\srtasks.exe",
         "?:\\Windows\\sys*\\taskkill.exe",
         "?:\\Program Files\\*.exe",
         "?:\\Program Files (x86)\\*.exe",
         "?:\\Windows\\Installer\\MSI*.tmp",
         "?:\\Windows\\Microsoft.NET\\Framework*\\RegSvcs.exe") and
 not (process.name : ("rundll32.exe", "regsvr32.exe") and process.args : ("?:\\Program Files\\*", "?:\\Program Files (x86)\\*"))]
[any where host.os.type == "windows" and event.category in ("network", "dns") and process.name != null]

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: System Binary Proxy Execution
- ID: T1218
- Reference URL: https://attack.mitre.org/techniques/T1218/
Sub-technique:
- Name: Msiexec
- ID: T1218.007
- Reference URL: https://attack.mitre.org/techniques/T1218/007/

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