Suspicious Scheduled Task BrowserOSR Masquerading as Google Corporation (via process_creation)

ATT&CK techniques

Execution → Priv Esc

Recon
Resource Dev
Initial Access
Execution
- T1053.005Scheduled Task
Persistence
- T1053.005Scheduled Task
Priv Esc
- T1053.005Scheduled Task
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of a scheduled task whose name begins with BrowserOSR and which spoofs the author field as Google Corporation, the persistence mechanism of the RedCurl EarthKapre APT. The task name encodes the victim hostname and the fake Google author disguises the entry among browser update tasks. This pairing of the BrowserOSR prefix with a forged Google author reveals the persistence.

Reporting behind it

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Suspicious Scheduled Task BrowserOSR Masquerading as Google Corporation (via process_creation)

Pivot detection · T1053.005 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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