220921a4.7z Page

Check for execution of regsvr32.exe or rundll32.exe shortly after the file was downloaded.

Based on the specific filename , this file is frequently associated with malware analysis and threat intelligence reports from late 2022 . It often appears in investigations related to the Qakbot (Qbot) banking trojan or similar delivery campaigns that used password-protected .7z archives to bypass email security filters. Malware Analysis Summary: 220921A4.7z File Type: 7-Zip Compressed Archive ( .7z ). 220921A4.7z

Once extracted, the user executes the internal file, which reaches out to a Command & Control (C2) server to download the primary malware payload. Technical Indicators (Estimated) Typical Value Original Date September 21, 2022 Archive Password 1234 or abc123 Primary Goal Check for execution of regsvr32

Arrives via "thread hijacking" (replying to existing email chains). Malware Analysis Summary: 220921A4

Initial access for ransomware deployment or data exfiltration. .7z (used to evade automated sandbox detection). Security Recommendations