What is Anti-School Trojan and removal instructions

This malicious trojan can do extremely serious damage to the infected system's data. Once run on the computer, it starts trying to overwrite first 255 sectors of all hard drives of the PC. In case of successful overwriting, all data on these drives will be lost.

Anti-School Trojan manual removal:
Kill processes:
a543f2438ac3d9561933af921834aecf.exe
Delete files:
a543f2438ac3d9561933af921834aecf.exe