Suspicious search-ms URI Handler Invocation in CVE-2023-36584 Exploit Chain

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1204.002Malicious File
Persistence
Priv Esc
Defense Evasion
- T1221Template Injection
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects invocation of the search-ms Windows search protocol handler with an attributes parameter, matching the delivery technique that triggers remote ZIP extraction in the CVE-2023-36884 and CVE-2023-36584 chain reported by Unit 42. Abuse of the search-ms handler lures users into opening remote content while bypassing web-mark protections which is an early exploitation signal.

Reporting behind it

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Suspicious search-ms URI Handler Invocation in CVE-2023-36584 Exploit Chain

Pivot detection · T1204.002 · 9 related

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