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
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 VTC.rar
Most commonly refers to compressed past papers or curricula for the VTC Hong Kong . Do not open the archive if the source is unknown
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. While "VTC