Sigma rule: MSExchange Transport Agent Installation

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-8edc6b28ed60, updated 2022-10-09T00:00:00.000Z.

Rule

Title
MSExchange Transport Agent Installation
Status
test
Level
medium
Author
Tobias Michalski (Nextron Systems)
Date
2021-06-08
Modified
2022-10-09
File
rules/windows/process_creation/proc_creation_win_powershell_msexchange_transport_agent.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the Installation of a Exchange Transport Agent

Log source

product
windows
category
process_creation

Detection

selection:
    CommandLine|contains: 'Install-TransportAgent'
condition: selection

False positives (as the rule lists them)

  • Legitimate installations of exchange TransportAgents. AssemblyPath is a good indicator for this.

Tags

  • attack.persistence
  • attack.t1505.002

MITRE ATT&CK ids this rule names

Related rules

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_powershell_msexchange_transport_agent.yml

Sources and licences

  • SigmaHQ

    "MSExchange Transport Agent Installation" by Tobias Michalski (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_powershell_msexchange_transport_agent.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: MSExchange Transport Agent Installation",
entity page, dataset version ref-8edc6b28ed60, updated 2022-10-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/83809e84-4475-4b69-bc3e-4aad8568612f (accessed 2026-11-03).
Underlying source: SigmaHQ rule 83809e84-4475-4b69-bc3e-4aad8568612f, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.