0nb.7z -

Other security-focused blog posts have explored the broader risks associated with archiving tools:

: The campaign primarily targeted governmental and civilian organizations in Ukraine as part of the Russo-Ukrainian conflict.

On February 4, 2025, researchers at Trend Micro published a blog post detailing how Russian-linked threat actors exploited a zero-day vulnerability in 7-Zip, identified as . 0NB.7z

: Attackers used compromised email accounts to send malicious archives. These attacks utilized homoglyph attacks , where visually similar characters are used to deceive users into opening malicious files.

: Security experts recommend updating 7-Zip to version 24.09 or later to patch this flaw. General 7z Security Context Other security-focused blog posts have explored the broader

: Analysis from ThreatLocker highlights that attackers prefer tools like 7-Zip because they are often pre-approved in corporate environments, making it difficult for standard antivirus software to flag their use as malicious.

: The vulnerability was used to deploy the SmokeLoader malware, which functions as a loader for further cyberespionage tools. These attacks utilized homoglyph attacks , where visually

: NIST notes that this specific vulnerability can bypass the "Mark-of-the-Web" protection mechanism, which typically warns users when opening files downloaded from the internet.