PUP.Optional.Bershnet

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PUP.Optional.Bershnet also known as Trojan.Win32.DownLoader12.dowcfo, W32/Dlhelper.A.gen!Eldorado, PE:Malware.Agent!6.1CD7.

Malware Analysis of PUP.Optional.Bershnet – 270315062329224.EXE

Created files:

%Temp%\2B33F78E-9917-4F9A-BFD5-CA44AF71EAD6.exe
%Temp%\42345D30-A587-44A2-AF3F-A6B0ED692B5E.exe
%Temp%\Downloader\270315062329224.exe
%Temp%\mailruupdater_tmp.exe
%Temp%\ZaxarSetup.4.001.33.exe

Autostart registry keys:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\ZaxarLoader: “”%Program Files%\Zaxar\ZaxarLoader.exe” /verysilent”
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\Timestasks: “”C:\ProgramData\TimeTasks\TimeTasksSetup.exe” /adv= /S”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\SmartSearch\DisplayName: “SmartSearch”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\SmartSearch\UninstallString: “”%Appdata%\SmartSearch\SmartSearch.exe” /uninstall”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\ZaxarGameBrowser\DisplayName: “Zaxar Games Browser”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\ZaxarGameBrowser\UninstallString: “”%Program Files%\Zaxar\uninstall.exe””

Detected by UnHackMe:

270315062329224.EXE
Default location: %TEMP%\DOWNLOADER\270315062329224.EXE

Dropper hash(md5): e1428c75d6237982858544cafe1674a2

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