Researchers at SentinelLabs have recently reported a surge of MBRLocker variant malware. MBRLocker malware overwrites the Master Boot Record (MBR), which handles booting the operating system on startup. By modifying this buffer of data, attackers can prevent a computer from booting entirely. Recently, a newly discovered MBRLocker sample taunted Vitali Kremez, the lead researcher of SentinelLabs, by claiming to originate from him and asking victims to contact him on Twitter. Additionally, the malware analysis team, malwarehunterteam was also taunted by the threat actors.
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