April_10-04-2022.7z Link

📌 : If you actually have this file, do not extract it on a host machine. It is almost certainly a live malware sample.

The most detailed technical breakdown of this specific file naming convention and campaign can be found on these cybersecurity blogs: 1. SANS Internet Storm Center (ISC)

: It provides the exact infection chain, showing how the .7z file leads to a DLL execution via regsvr32.exe . 3. Trend Micro / Palo Alto Unit 42 APRIL_10-04-2022.7z

: The password was usually provided in the email body, making the user feel "secure" while actually helping the malware bypass the gateway.

: They explain why the hackers used the .7z format (it has a higher compression ratio and was less scrutinized by legacy scanners). 💡 Why this file is "Interesting" 📌 : If you actually have this file,

: It marked a shift where attackers used password-protected archives to hide the payload from automated sandbox analysis.

Both firms published blogs in early 2022 regarding the resurgence of . Unit 42 : Look for their research on Emotet's evolution . SANS Internet Storm Center (ISC) : It provides

Around April 2022, security researchers tracked a significant spike in malicious emails using password-protected .7z archives. : Often delivered the Emotet Trojan.