Suspicious File Created in Startup Folder by WinRAR via CVE-2025-8088
- Product
- windows
- Category
- file_event
- Author
- HuntRule
- Published
- 2026-07-17
- Updated
- 2026-08-28
ATT&CK techniques
Initial Access → Priv EscRecon
Resource Dev
Initial Access
Execution
Persistence
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects WinRAR or its extraction binaries writing a file into a user Startup folder which indicates exploitation of the CVE-2025-8088 alternate data stream path traversal flaw. Attackers drop LNK HTA or BAT payloads into Startup to gain logon persistence when a user opens a crafted archive.
Reporting behind it
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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