The PE compilation timestamp of one of the sample is 2021-12-28, suggesting that the attack might have been in preparation for almost two months.
The Wiper binary is signed using a code signing certificate issued to Hermetica Digital Ltd.
The wiper abuses legitimate drivers from the EaseUS Partition Master software in order to corrupt data.
As a final step the wiper reboot computer
In one of the targeted organizations, the wiper was dropped via the default (domain policy) GPO meaning that attackers had likely taken control of the Active Directory server.
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