: Permanently delete the message from your inbox and your "Deleted Items" folder.
The subject line is a common indicator of a malware or phishing campaign targeting speakers of Slavic languages, particularly Czech and Slovak. The text is a result of character encoding errors (mojibake), where the original phrase "Nová složka.rar" (meaning "New Folder" in Czech) or "Nová zložka.rar" (in Slovak) has been corrupted during transmission. Technical Breakdown of the Threat NovГЎ sloЕѕka.rar
: Do not download or extract the .rar file. Even simply extracting the contents can sometimes trigger "zip bomb" vulnerabilities or lead to accidental execution. : Permanently delete the message from your inbox
: Since your email is likely on a spam list, check services like Have I Been Pwned to see which of your accounts may have been compromised in past data leaks. Technical Breakdown of the Threat : Do not
: If you have already interacted with the file, disconnect your device from the internet immediately and run a full system scan using a reputable antivirus like Malwarebytes or Microsoft Defender .
: The attachment is a compressed RAR file. This format is used by attackers to bypass basic email security filters that might otherwise flag executable files (like .exe , .vbs , or .js ). By hiding the payload inside an archive, they hope the user will manually extract and run the file.
: Historically, attachments with this name have been linked to Trojan horses , Infostealers (like Agent Tesla or Formbook), and Ransomware . Once the archive is opened and the file inside is executed, the malware can: Steal saved passwords from web browsers and email clients. Log keystrokes to capture banking credentials. Encrypt your files and demand a ransom. Turn your computer into a "bot" for further spam campaigns. Why You Received It