Analysis
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max time kernel
170s -
max time network
132s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
16-02-2022 23:05
Static task
static1
Behavioral task
behavioral1
Sample
3935efdd48fc122e4b10c068f06c53e4360aeabdba3b70c7958af79a208fda58.dll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
3935efdd48fc122e4b10c068f06c53e4360aeabdba3b70c7958af79a208fda58.dll
Resource
win10v2004-en-20220113
General
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Target
3935efdd48fc122e4b10c068f06c53e4360aeabdba3b70c7958af79a208fda58.dll
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Size
592KB
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MD5
365d6a237322d9e9423c139618010221
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SHA1
3f025bc6ad85e19a259c38e224ccd8e482645126
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SHA256
3935efdd48fc122e4b10c068f06c53e4360aeabdba3b70c7958af79a208fda58
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SHA512
4fa65fb387532b1e04e94b9d8996c937cd90205094b7e168d8feda1d28ae9b871b4e3eb10ceced13c49fea5daabd9d0a7a280c838ba4e2472c94e7ef29f8bc94
Malware Config
Extracted
C:\DECRYPT-FILES.txt
maze
http://aoacugmutagkwctu.onion/6d570cc8f9a90bc0
https://mazedecrypt.top/6d570cc8f9a90bc0
Signatures
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Maze
Ransomware family also known as ChaCha.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\RequestCopy.png => C:\Users\Admin\Pictures\RequestCopy.png.IUFYvpd regsvr32.exe File renamed C:\Users\Admin\Pictures\SyncRead.raw => C:\Users\Admin\Pictures\SyncRead.raw.gTxXJck regsvr32.exe File renamed C:\Users\Admin\Pictures\ExpandUnpublish.tif => C:\Users\Admin\Pictures\ExpandUnpublish.tif.Ydx2IR regsvr32.exe File renamed C:\Users\Admin\Pictures\NewConnect.png => C:\Users\Admin\Pictures\NewConnect.png.crQjeEA regsvr32.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DECRYPT-FILES.txt regsvr32.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\6d570cc8f9a90bc0.tmp regsvr32.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\111.bmp" regsvr32.exe -
Drops file in Program Files directory 42 IoCs
description ioc Process File opened for modification C:\Program Files\CompletePush.txt regsvr32.exe File opened for modification C:\Program Files\JoinImport.wav regsvr32.exe File opened for modification C:\Program Files\RemoveClear.vsd regsvr32.exe File opened for modification C:\Program Files\SaveRepair.au3 regsvr32.exe File opened for modification C:\Program Files\AssertBlock.M2T regsvr32.exe File opened for modification C:\Program Files\NewResume.wm regsvr32.exe File opened for modification C:\Program Files\SubmitTest.php regsvr32.exe File created C:\Program Files (x86)\Microsoft SQL Server Compact Edition\DECRYPT-FILES.txt regsvr32.exe File opened for modification C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\6d570cc8f9a90bc0.tmp regsvr32.exe File opened for modification C:\Program Files\UninstallRename.rm regsvr32.exe File opened for modification C:\Program Files (x86)\6d570cc8f9a90bc0.tmp regsvr32.exe File opened for modification C:\Program Files (x86)\Microsoft SQL Server Compact Edition\6d570cc8f9a90bc0.tmp regsvr32.exe File opened for modification C:\Program Files\ConvertFromMove.001 regsvr32.exe File opened for modification C:\Program Files\MountExpand.vstx regsvr32.exe File opened for modification C:\Program Files\RegisterExpand.001 regsvr32.exe File opened for modification C:\Program Files\RevokeConvertFrom.dib regsvr32.exe File opened for modification C:\Program Files\SendWatch.odt regsvr32.exe File opened for modification C:\Program Files\SkipPop.wpl regsvr32.exe File opened for modification C:\Program Files\StepSelect.cfg regsvr32.exe File created C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\DECRYPT-FILES.txt regsvr32.exe File opened for modification C:\Program Files\DenyRevoke.7z regsvr32.exe File opened for modification C:\Program Files\HideSwitch.mp3 regsvr32.exe File opened for modification C:\Program Files\ReceiveHide.svg regsvr32.exe File opened for modification C:\Program Files\RepairReset.gif regsvr32.exe File opened for modification C:\Program Files\SaveSend.xlt regsvr32.exe File created C:\Program Files\DECRYPT-FILES.txt regsvr32.exe File opened for modification C:\Program Files\MountUninstall.ex_ regsvr32.exe File opened for modification C:\Program Files\RevokeInvoke.dib regsvr32.exe File created C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\DECRYPT-FILES.txt regsvr32.exe File created C:\Program Files (x86)\DECRYPT-FILES.txt regsvr32.exe File opened for modification C:\Program Files\DenyFind.jtx regsvr32.exe File opened for modification C:\Program Files\FormatSearch.pptx regsvr32.exe File opened for modification C:\Program Files\ResolveInitialize.vssm regsvr32.exe File opened for modification C:\Program Files\RestartOpen.vsdm regsvr32.exe File opened for modification C:\Program Files\UsePublish.search-ms regsvr32.exe File opened for modification C:\Program Files\6d570cc8f9a90bc0.tmp regsvr32.exe File opened for modification C:\Program Files\ConvertFromRestart.wpl regsvr32.exe File opened for modification C:\Program Files\CopySearch.mov regsvr32.exe File opened for modification C:\Program Files\ExportSkip.cab regsvr32.exe File opened for modification C:\Program Files\DisconnectPop.mpeg3 regsvr32.exe File opened for modification C:\Program Files\SetExpand.odt regsvr32.exe File opened for modification C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\6d570cc8f9a90bc0.tmp regsvr32.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1860 regsvr32.exe -
Suspicious use of AdjustPrivilegeToken 43 IoCs
description pid Process Token: SeBackupPrivilege 516 vssvc.exe Token: SeRestorePrivilege 516 vssvc.exe Token: SeAuditPrivilege 516 vssvc.exe Token: SeIncreaseQuotaPrivilege 852 wmic.exe Token: SeSecurityPrivilege 852 wmic.exe Token: SeTakeOwnershipPrivilege 852 wmic.exe Token: SeLoadDriverPrivilege 852 wmic.exe Token: SeSystemProfilePrivilege 852 wmic.exe Token: SeSystemtimePrivilege 852 wmic.exe Token: SeProfSingleProcessPrivilege 852 wmic.exe Token: SeIncBasePriorityPrivilege 852 wmic.exe Token: SeCreatePagefilePrivilege 852 wmic.exe Token: SeBackupPrivilege 852 wmic.exe Token: SeRestorePrivilege 852 wmic.exe Token: SeShutdownPrivilege 852 wmic.exe Token: SeDebugPrivilege 852 wmic.exe Token: SeSystemEnvironmentPrivilege 852 wmic.exe Token: SeRemoteShutdownPrivilege 852 wmic.exe Token: SeUndockPrivilege 852 wmic.exe Token: SeManageVolumePrivilege 852 wmic.exe Token: 33 852 wmic.exe Token: 34 852 wmic.exe Token: 35 852 wmic.exe Token: SeIncreaseQuotaPrivilege 852 wmic.exe Token: SeSecurityPrivilege 852 wmic.exe Token: SeTakeOwnershipPrivilege 852 wmic.exe Token: SeLoadDriverPrivilege 852 wmic.exe Token: SeSystemProfilePrivilege 852 wmic.exe Token: SeSystemtimePrivilege 852 wmic.exe Token: SeProfSingleProcessPrivilege 852 wmic.exe Token: SeIncBasePriorityPrivilege 852 wmic.exe Token: SeCreatePagefilePrivilege 852 wmic.exe Token: SeBackupPrivilege 852 wmic.exe Token: SeRestorePrivilege 852 wmic.exe Token: SeShutdownPrivilege 852 wmic.exe Token: SeDebugPrivilege 852 wmic.exe Token: SeSystemEnvironmentPrivilege 852 wmic.exe Token: SeRemoteShutdownPrivilege 852 wmic.exe Token: SeUndockPrivilege 852 wmic.exe Token: SeManageVolumePrivilege 852 wmic.exe Token: 33 852 wmic.exe Token: 34 852 wmic.exe Token: 35 852 wmic.exe -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 804 wrote to memory of 1860 804 regsvr32.exe 27 PID 804 wrote to memory of 1860 804 regsvr32.exe 27 PID 804 wrote to memory of 1860 804 regsvr32.exe 27 PID 804 wrote to memory of 1860 804 regsvr32.exe 27 PID 804 wrote to memory of 1860 804 regsvr32.exe 27 PID 804 wrote to memory of 1860 804 regsvr32.exe 27 PID 804 wrote to memory of 1860 804 regsvr32.exe 27 PID 1860 wrote to memory of 852 1860 regsvr32.exe 34 PID 1860 wrote to memory of 852 1860 regsvr32.exe 34 PID 1860 wrote to memory of 852 1860 regsvr32.exe 34 PID 1860 wrote to memory of 852 1860 regsvr32.exe 34
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\3935efdd48fc122e4b10c068f06c53e4360aeabdba3b70c7958af79a208fda58.dll1⤵
- Suspicious use of WriteProcessMemory
PID:804 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\3935efdd48fc122e4b10c068f06c53e4360aeabdba3b70c7958af79a208fda58.dll2⤵
- Modifies extensions of user files
- Drops startup file
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1860 -
C:\Windows\system32\wbem\wmic.exe"C:\k\csoa\..\..\Windows\tl\vbeld\rdcso\..\..\..\system32\v\..\wbem\xrk\wsr\..\..\wmic.exe" shadowcopy delete3⤵
- Suspicious use of AdjustPrivilegeToken
PID:852
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:516
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{3F6B5E16-092A-41ED-930B-0B4125D91D4E}1⤵PID:1360