huntrule

Suspicious VietCredCare Stealer Persistence via Startup Folder Drop

PremiumReviewedSigma · High · v1
Product
windows
Category
file_event
Author
HuntRule
Published
2026-08-02
Updated
2026-08-28
AnalysisDetection

ATT&CK techniques

Persistence → Priv Esc

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule detects the VietCredCare stealer binary crsysys.exe being written into the Windows Startup folder for persistence. The malware copies itself here so it relaunches at every user logon. This autostart behavior maintains attacker access for continued credential theft.

Reporting behind it

Related detections9 linkedT1547.001 — drag to rearrange
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Suspicious RunOnce Persistence Pointing to User AppData
Malicious FalseFont Backdoor Run Key Persistence from AppData (via registry_set)
Malicious Registry Run Key Persistence via AHealthDB by Stately Taurus
Suspicious VietCredCare Stealer Persistence via Startup Folder Drop
Pivot detection · T1547.001 · 9 related

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