Use updated antivirus software like Malwarebytes to determine if the file is a threat.
Unless you specifically downloaded it from an official source for virus removal, assume it is malicious.
In more recent years, security researchers have identified as a malicious file associated with the Cuba ransomware gang.
By disabling antivirus and other security tools, it clears the way for the ransomware to encrypt the victim's files without interference. Summary Table Legitimate Version Malicious Version Full Name Kaspersky KidoKiller BurntCigar Ransomware Primary Goal Remove the Conficker worm Terminate security processes & encrypt files Developer/Source Kaspersky Labs Cuba Ransomware Gang Current Status Mostly legacy (specific to older threats) Active threat used in modern attacks Recommendation If you find kk.exe on your system: