Analysis
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max time kernel
176s -
max time network
181s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
16-02-2022 23:02
Static task
static1
Behavioral task
behavioral1
Sample
4d98e0b246a514cf89ff635364fc157541be08641838cf238bd7ed91274739f3.dll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
4d98e0b246a514cf89ff635364fc157541be08641838cf238bd7ed91274739f3.dll
Resource
win10v2004-en-20220113
General
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Target
4d98e0b246a514cf89ff635364fc157541be08641838cf238bd7ed91274739f3.dll
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Size
592KB
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MD5
8d90060c1cf2c468f89d2a856d657333
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SHA1
6f332535573d4d14d92b5cb92068f1c595a9bdd4
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SHA256
4d98e0b246a514cf89ff635364fc157541be08641838cf238bd7ed91274739f3
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SHA512
4b9a3fe3488503f70f28abf04152c5014d6d1fdf7d831854bb419d77530f2785a355b61dbaa87d7b25c912b41d5880c49e6059726aab722504bb195e606b5c12
Malware Config
Extracted
C:\DECRYPT-FILES.txt
maze
http://aoacugmutagkwctu.onion/6c2b0cc872a76363
https://mazedecrypt.top/6c2b0cc872a76363
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\CheckpointOpen.png => C:\Users\Admin\Pictures\CheckpointOpen.png.NPpMCQK regsvr32.exe File renamed C:\Users\Admin\Pictures\ProtectStart.tif => C:\Users\Admin\Pictures\ProtectStart.tif.NPpMCQK regsvr32.exe File opened for modification C:\Users\Admin\Pictures\RequestUnpublish.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\RequestUnpublish.tiff => C:\Users\Admin\Pictures\RequestUnpublish.tiff.G4gL regsvr32.exe -
Drops startup file 4 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\6c2b0cc872a76363.tmp regsvr32.exe 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\6c2b0cc872a76363.tmp regsvr32.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\DECRYPT-FILES.txt regsvr32.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\111.bmp" regsvr32.exe -
Drops file in Program Files directory 39 IoCs
description ioc Process File opened for modification C:\Program Files\JoinNew.potm regsvr32.exe File opened for modification C:\Program Files\RepairTest.tiff regsvr32.exe File opened for modification C:\Program Files\TestRestart.ADTS regsvr32.exe File opened for modification C:\Program Files\UnregisterRestart.vsw regsvr32.exe File created C:\Program Files (x86)\DECRYPT-FILES.txt regsvr32.exe File opened for modification C:\Program Files\DebugExpand.png regsvr32.exe File opened for modification C:\Program Files\UnpublishSearch.rar regsvr32.exe File opened for modification C:\Program Files (x86)\6c2b0cc872a76363.tmp regsvr32.exe File opened for modification C:\Program Files\ExpandRename.temp regsvr32.exe File opened for modification C:\Program Files\CompressConvertFrom.aiff regsvr32.exe File opened for modification C:\Program Files\MountWatch.vsd regsvr32.exe File opened for modification C:\Program Files\RequestUninstall.sql regsvr32.exe File opened for modification C:\Program Files\RevokeRequest.au3 regsvr32.exe File opened for modification C:\Program Files\AssertRename.ps1 regsvr32.exe File opened for modification C:\Program Files\ConvertExit.jfif regsvr32.exe File opened for modification C:\Program Files\ConvertRepair.tif regsvr32.exe File opened for modification C:\Program Files\PopMerge.sql regsvr32.exe File opened for modification C:\Program Files\ReceiveSelect.crw regsvr32.exe File opened for modification C:\Program Files\SetClose.docm regsvr32.exe File opened for modification C:\Program Files\StopEnter.dxf regsvr32.exe File opened for modification C:\Program Files\UnpublishPublish.emz regsvr32.exe File created C:\Program Files\DECRYPT-FILES.txt regsvr32.exe File opened for modification C:\Program Files\SetAssert.M2T regsvr32.exe File opened for modification C:\Program Files\UnpublishOpen.php regsvr32.exe File opened for modification C:\Program Files\DisableSearch.mpeg3 regsvr32.exe File opened for modification C:\Program Files\SelectProtect.ppsm regsvr32.exe File opened for modification C:\Program Files\LockDeny.mp3 regsvr32.exe File opened for modification C:\Program Files\ConfirmSelect.TS regsvr32.exe File opened for modification C:\Program Files\MeasureGet.ppsm regsvr32.exe File opened for modification C:\Program Files\MergeWrite.midi regsvr32.exe File opened for modification C:\Program Files\OpenUpdate.vstm regsvr32.exe File opened for modification C:\Program Files\RenameRequest.html regsvr32.exe File opened for modification C:\Program Files\SwitchSearch.inf regsvr32.exe File opened for modification C:\Program Files\6c2b0cc872a76363.tmp regsvr32.exe File opened for modification C:\Program Files\DebugRepair.vsw regsvr32.exe File opened for modification C:\Program Files\EnterRegister.rtf regsvr32.exe File opened for modification C:\Program Files\MergeNew.wma regsvr32.exe File opened for modification C:\Program Files\WriteEnter.js regsvr32.exe File opened for modification C:\Program Files\BackupSwitch.search-ms regsvr32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4616 regsvr32.exe 4616 regsvr32.exe -
Suspicious use of AdjustPrivilegeToken 45 IoCs
description pid Process Token: SeBackupPrivilege 4916 vssvc.exe Token: SeRestorePrivilege 4916 vssvc.exe Token: SeAuditPrivilege 4916 vssvc.exe Token: SeIncreaseQuotaPrivilege 1512 wmic.exe Token: SeSecurityPrivilege 1512 wmic.exe Token: SeTakeOwnershipPrivilege 1512 wmic.exe Token: SeLoadDriverPrivilege 1512 wmic.exe Token: SeSystemProfilePrivilege 1512 wmic.exe Token: SeSystemtimePrivilege 1512 wmic.exe Token: SeProfSingleProcessPrivilege 1512 wmic.exe Token: SeIncBasePriorityPrivilege 1512 wmic.exe Token: SeCreatePagefilePrivilege 1512 wmic.exe Token: SeBackupPrivilege 1512 wmic.exe Token: SeRestorePrivilege 1512 wmic.exe Token: SeShutdownPrivilege 1512 wmic.exe Token: SeDebugPrivilege 1512 wmic.exe Token: SeSystemEnvironmentPrivilege 1512 wmic.exe Token: SeRemoteShutdownPrivilege 1512 wmic.exe Token: SeUndockPrivilege 1512 wmic.exe Token: SeManageVolumePrivilege 1512 wmic.exe Token: 33 1512 wmic.exe Token: 34 1512 wmic.exe Token: 35 1512 wmic.exe Token: 36 1512 wmic.exe Token: SeIncreaseQuotaPrivilege 1512 wmic.exe Token: SeSecurityPrivilege 1512 wmic.exe Token: SeTakeOwnershipPrivilege 1512 wmic.exe Token: SeLoadDriverPrivilege 1512 wmic.exe Token: SeSystemProfilePrivilege 1512 wmic.exe Token: SeSystemtimePrivilege 1512 wmic.exe Token: SeProfSingleProcessPrivilege 1512 wmic.exe Token: SeIncBasePriorityPrivilege 1512 wmic.exe Token: SeCreatePagefilePrivilege 1512 wmic.exe Token: SeBackupPrivilege 1512 wmic.exe Token: SeRestorePrivilege 1512 wmic.exe Token: SeShutdownPrivilege 1512 wmic.exe Token: SeDebugPrivilege 1512 wmic.exe Token: SeSystemEnvironmentPrivilege 1512 wmic.exe Token: SeRemoteShutdownPrivilege 1512 wmic.exe Token: SeUndockPrivilege 1512 wmic.exe Token: SeManageVolumePrivilege 1512 wmic.exe Token: 33 1512 wmic.exe Token: 34 1512 wmic.exe Token: 35 1512 wmic.exe Token: 36 1512 wmic.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 4180 wrote to memory of 4616 4180 regsvr32.exe 82 PID 4180 wrote to memory of 4616 4180 regsvr32.exe 82 PID 4180 wrote to memory of 4616 4180 regsvr32.exe 82 PID 4616 wrote to memory of 1512 4616 regsvr32.exe 93 PID 4616 wrote to memory of 1512 4616 regsvr32.exe 93
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\4d98e0b246a514cf89ff635364fc157541be08641838cf238bd7ed91274739f3.dll1⤵
- Suspicious use of WriteProcessMemory
PID:4180 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\4d98e0b246a514cf89ff635364fc157541be08641838cf238bd7ed91274739f3.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:4616 -
C:\Windows\system32\wbem\wmic.exe"C:\v\..\Windows\h\wph\..\..\system32\ding\..\wbem\wd\jtn\ghhi\..\..\..\wmic.exe" shadowcopy delete3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1512
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4916
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv1⤵PID:5072