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W32/Backdoor.BUQL also known as Bck/Nuclear.BN, W32/Nuclear.AS!tr, Troj.W32.Gen.lArK.
Malware Analysis of W32/Backdoor.BUQL – CSRSS.SYS
Created files:
%APPDATA%\MICROSOFT\PROTECT\S-1-5-21-2250177403-3231077850-1239169437-1002\0D8336F7-1308-4057-A10B-50AB55EBE17C
%STARTUP%\CSRSS.LNK
%SYSDIR%\WINDOWS\CSRSS.EXE
%SYSDIR%\WINDOWS\CSRSS.SYS
Autostart registry keys:
HKLM\Software\Classes\dllfile\shell\open\command\: “rundll32.exe”
HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\CSRSS: “%SYSDIR%\WINDOWS\CSRSS.EXE”
HKCU\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\CSRSS: “%SYSDIR%\WINDOWS\CSRSS.EXE”
Detected by UnHackMe:
CSRSS.SYS
Default location: %SYSDIR%\WINDOWS\CSRSS.SYS
Dropper hash(md5): 01ee88c05437700ce1556990b52bbeb3
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