0nb.7z Today

: 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.

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

: 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. : NIST notes that this specific vulnerability can

: 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. : Attackers used compromised email accounts to send

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

While there is no single "official" blog post titled exactly "0NB.7z," recent threat intelligence reports and security blog posts from early 2025 detail a critical exploitation involving archives and a zero-day vulnerability. Security Vulnerability: CVE-2025-0411