0nb.7z Page

: 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.

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. : Attackers used compromised email accounts to send

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 Other security-focused blog posts have explored the broader

: 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.

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

: The vulnerability was used to deploy the SmokeLoader malware, which functions as a loader for further cyberespionage tools.