Sigma rule: Malicious DLL File Dropped in the Teams or OneDrive Folder

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-c59e6acdf79e, updated 2022-08-12T00:00:00.000Z.

Rule

Title
Malicious DLL File Dropped in the Teams or OneDrive Folder
Status
test
Level
high
Author
frack113
Date
2022-08-12
File
rules/windows/file/file_event/file_event_win_iphlpapi_dll_sideloading.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects creation of a malicious DLL file in the location where the OneDrive or Team applications
Upon execution of the Teams or OneDrive application, the dropped malicious DLL file ("iphlpapi.dll") is sideloaded

Log source

product
windows
category
file_event

Detection

selection:
    TargetFilename|contains|all:
        - 'iphlpapi.dll'
        - '\AppData\Local\Microsoft'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.persistence
  • attack.privilege-escalation
  • attack.execution
  • attack.stealth
  • attack.t1574.001

MITRE ATT&CK ids this rule names

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/file/file_event/file_event_win_iphlpapi_dll_sideloading.yml

Sources and licences

  • SigmaHQ

    "Malicious DLL File Dropped in the Teams or OneDrive Folder" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_event/file_event_win_iphlpapi_dll_sideloading.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: Malicious DLL File Dropped in the Teams or OneDrive Folder",
entity page, dataset version ref-c59e6acdf79e, updated 2022-08-12T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/1908fcc1-1b92-4272-8214-0fbaf2fa5163 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 1908fcc1-1b92-4272-8214-0fbaf2fa5163, 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.