Lab02.7z -

In late 2024, amidst the ongoing conflict, Ukrainian government and civilian organizations began receiving highly targeted . These emails appeared to be urgent documents, but tucked inside was a double-archived file: Lab02.7z . The Weapon: CVE-2025-0411

The "story" of this file is actually the story of a clever vulnerability discovered in the popular archiver.

This script reached out to the hackers' command-and-control servers to download . Lab02.7z

Once installed, the malware began , harvesting sensitive data, and providing a "backdoor" for further espionage. The Resolution

The caught the campaign in September 2024. They worked with the developer of 7-Zip, Igor Pavlov, who released a patch in version 24.09 on November 30, 2024, to fix the MOTW bypass. In late 2024, amidst the ongoing conflict, Ukrainian

Today, Lab02.7z remains a textbook example of how attackers use mundane-looking archive files to weaponize small software bugs into major international security incidents.

: Hackers discovered that if they buried a malicious file inside a nested archive (like a ZIP inside Lab02.7z ), 7-Zip would fail to pass that "unsafe" flag to the inner file when extracted. This script reached out to the hackers' command-and-control

When a user opened Lab02.7z and double-clicked what looked like a Word document, they unknowingly bypassed all of Windows' built-in security warnings. A hidden would launch in the background.