Do not open the archive if the source is unknown. Instead, upload the file to a multi-engine scanner like VirusTotal to check for embedded threats before extraction. Targeted Attack Distributes PlugX in Russia | Proofpoint US
RAR files are a standard format for delivering malware like PlugX. If you received this file from an unsolicited or suspicious email, it may be a "decoy" file designed for social engineering. VTC.rar
However, cybersecurity researchers at Proofpoint have previously identified RAR archives being used as delivery mechanisms for the (a Remote Access Trojan) in targeted spear-phishing campaigns. While "VTC.rar" is not explicitly named as a known malicious indicator in those specific public reports, attackers frequently use common or legitimate-sounding file names to trick users. Key Observations Do not open the archive if the source is unknown
Most commonly refers to compressed past papers or curricula for the VTC Hong Kong . If you received this file from an unsolicited