April_10-04-2022.7z Guide

: 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"

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) APRIL_10-04-2022.7z

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

: Used "thread hijacking" (replying to old email chains). File Name : Followed the pattern [Month]_[Date]-[Year].7z . Lure : Contained a malicious .lnk or .vbs file inside. 📝 Recommended Blog Coverage : Used "thread hijacking" (replying to old email chains)

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

: April 2022 was a peak period for Emotet before its subsequent infrastructure takeovers and shifts.