Sigma rule: Suspicious Teams Application Related ObjectAcess Event

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-135ac7a85dd0, updated 2022-09-16T00:00:00.000Z.

Rule

Title
Suspicious Teams Application Related ObjectAcess Event
Status
test
Level
high
Author
@SerkinValery
Date
2022-09-16
File
rules/windows/builtin/security/win_security_teams_suspicious_objectaccess.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects an access to authentication tokens and accounts of Microsoft Teams desktop application.

Log source

product
windows
service
security

Detection

selection:
    EventID: 4663
    ObjectName|contains:
        - '\Microsoft\Teams\Cookies'
        - '\Microsoft\Teams\Local Storage\leveldb'
filter:
    ProcessName|contains: '\Microsoft\Teams\current\Teams.exe'
condition: selection and not filter

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.credential-access
  • attack.t1528

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/builtin/security/win_security_teams_suspicious_objectaccess.yml

Sources and licences

  • SigmaHQ

    "Suspicious Teams Application Related ObjectAcess Event" by @SerkinValery (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/security/win_security_teams_suspicious_objectaccess.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: Suspicious Teams Application Related ObjectAcess Event",
entity page, dataset version ref-135ac7a85dd0, updated 2022-09-16T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/25cde13e-8e20-4c29-b949-4e795b76f16f (accessed 2026-11-03).
Underlying source: SigmaHQ rule 25cde13e-8e20-4c29-b949-4e795b76f16f, 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.