Analysis
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max time kernel
1541s -
max time network
1248s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
25-05-2022 13:37
Static task
static1
Behavioral task
behavioral1
Sample
wordupd.exe
Resource
win7-20220414-en
General
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Target
wordupd.exe
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Size
736KB
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MD5
21a563f958b73d453ad91e251b11855c
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SHA1
64ed4f6b315448d518ed003a1d0c7e56790ef50d
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SHA256
067f1b8f1e0b2bfe286f5169e17834e8cf7f4266b8d97f28ea78995dc81b0e7b
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SHA512
3eaef227db10759c65d668317322e71cd60e60427afd4d4f5f627e9b7a9d4e6d3287b7bf32df3fa7ba2f7062ec41393a100a477668b7f4dca76c2b8932c1b9eb
Malware Config
Extracted
C:\DECRYPT-FILES.txt
maze
http://aoacugmutagkwctu.onion/885e098f19647d13
https://mazedecrypt.top/885e098f19647d13
Signatures
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Maze
Ransomware family also known as ChaCha.
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suricata: ET MALWARE Maze/ID Ransomware Activity
suricata: ET MALWARE Maze/ID Ransomware Activity
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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 9 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
wordupd.exedescription ioc Process File renamed C:\Users\Admin\Pictures\UnblockUninstall.png => C:\Users\Admin\Pictures\UnblockUninstall.png.7ZzBSjf wordupd.exe File opened for modification C:\Users\Admin\Pictures\ConvertToRequest.tiff wordupd.exe File renamed C:\Users\Admin\Pictures\ConvertToRequest.tiff => C:\Users\Admin\Pictures\ConvertToRequest.tiff.K8M5R wordupd.exe File renamed C:\Users\Admin\Pictures\InvokeExport.raw => C:\Users\Admin\Pictures\InvokeExport.raw.IN6l95 wordupd.exe File renamed C:\Users\Admin\Pictures\RemoveConfirm.tif => C:\Users\Admin\Pictures\RemoveConfirm.tif.7ZzBSjf wordupd.exe File renamed C:\Users\Admin\Pictures\UnlockLock.raw => C:\Users\Admin\Pictures\UnlockLock.raw.7ZzBSjf wordupd.exe File renamed C:\Users\Admin\Pictures\AddPush.tif => C:\Users\Admin\Pictures\AddPush.tif.K8M5R wordupd.exe File renamed C:\Users\Admin\Pictures\CompressInstall.tif => C:\Users\Admin\Pictures\CompressInstall.tif.K8M5R wordupd.exe File renamed C:\Users\Admin\Pictures\ReceiveInvoke.raw => C:\Users\Admin\Pictures\ReceiveInvoke.raw.XkDOly wordupd.exe -
Drops startup file 2 IoCs
Processes:
wordupd.exedescription ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DECRYPT-FILES.txt wordupd.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\885e098f19647d13.tmp wordupd.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
wordupd.exedescription ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\000.bmp" wordupd.exe -
Drops file in Program Files directory 38 IoCs
Processes:
wordupd.exedescription ioc Process File opened for modification C:\Program Files\LimitSkip.mpeg2 wordupd.exe File opened for modification C:\Program Files\SwitchInstall.mpa wordupd.exe File opened for modification C:\Program Files\DisablePublish.shtml wordupd.exe File opened for modification C:\Program Files\InitializeProtect.png wordupd.exe File opened for modification C:\Program Files\DisablePublish.vssx wordupd.exe File opened for modification C:\Program Files\OutRepair.iso wordupd.exe File opened for modification C:\Program Files\WaitRename.pptm wordupd.exe File opened for modification C:\Program Files (x86)\885e098f19647d13.tmp wordupd.exe File opened for modification C:\Program Files\CompleteUpdate.css wordupd.exe File opened for modification C:\Program Files\ConnectPush.3gp wordupd.exe File opened for modification C:\Program Files\InitializeStart.eprtx wordupd.exe File opened for modification C:\Program Files\ReceivePublish.docx wordupd.exe File opened for modification C:\Program Files\UnblockUnregister.mpp wordupd.exe File opened for modification C:\Program Files\UndoApprove.xlsm wordupd.exe File opened for modification C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\885e098f19647d13.tmp wordupd.exe File created C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\DECRYPT-FILES.txt wordupd.exe File opened for modification C:\Program Files\AssertUnregister.ex_ wordupd.exe File opened for modification C:\Program Files\EnterDeny.vbe wordupd.exe File opened for modification C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\885e098f19647d13.tmp wordupd.exe File opened for modification C:\Program Files\RevokeEnter.ppsm wordupd.exe File opened for modification C:\Program Files\AddExpand.xhtml wordupd.exe File opened for modification C:\Program Files\PublishConnect.mhtml wordupd.exe File created C:\Program Files (x86)\DECRYPT-FILES.txt wordupd.exe File created C:\Program Files (x86)\Microsoft SQL Server Compact Edition\DECRYPT-FILES.txt wordupd.exe File opened for modification C:\Program Files (x86)\Microsoft SQL Server Compact Edition\885e098f19647d13.tmp wordupd.exe File opened for modification C:\Program Files\MergeSync.wma wordupd.exe File opened for modification C:\Program Files\ResetReceive.aifc wordupd.exe File opened for modification C:\Program Files\DisconnectRegister.lock wordupd.exe File opened for modification C:\Program Files\LockImport.asx wordupd.exe File opened for modification C:\Program Files\PublishWait.wvx wordupd.exe File created C:\Program Files\DECRYPT-FILES.txt wordupd.exe File opened for modification C:\Program Files\DenySync.gif wordupd.exe File opened for modification C:\Program Files\GrantRequest.dxf wordupd.exe File opened for modification C:\Program Files\885e098f19647d13.tmp wordupd.exe File opened for modification C:\Program Files\DenyExport.doc wordupd.exe File created C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\DECRYPT-FILES.txt wordupd.exe File opened for modification C:\Program Files\LockStep.ADTS wordupd.exe File opened for modification C:\Program Files\StartCompress.ods wordupd.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
wordupd.exepid Process 1980 wordupd.exe -
Suspicious use of AdjustPrivilegeToken 59 IoCs
Processes:
vssvc.exewmic.exeAUDIODG.EXEAUDIODG.EXEAUDIODG.EXEAUDIODG.EXEdescription pid Process Token: SeBackupPrivilege 652 vssvc.exe Token: SeRestorePrivilege 652 vssvc.exe Token: SeAuditPrivilege 652 vssvc.exe Token: SeIncreaseQuotaPrivilege 340 wmic.exe Token: SeSecurityPrivilege 340 wmic.exe Token: SeTakeOwnershipPrivilege 340 wmic.exe Token: SeLoadDriverPrivilege 340 wmic.exe Token: SeSystemProfilePrivilege 340 wmic.exe Token: SeSystemtimePrivilege 340 wmic.exe Token: SeProfSingleProcessPrivilege 340 wmic.exe Token: SeIncBasePriorityPrivilege 340 wmic.exe Token: SeCreatePagefilePrivilege 340 wmic.exe Token: SeBackupPrivilege 340 wmic.exe Token: SeRestorePrivilege 340 wmic.exe Token: SeShutdownPrivilege 340 wmic.exe Token: SeDebugPrivilege 340 wmic.exe Token: SeSystemEnvironmentPrivilege 340 wmic.exe Token: SeRemoteShutdownPrivilege 340 wmic.exe Token: SeUndockPrivilege 340 wmic.exe Token: SeManageVolumePrivilege 340 wmic.exe Token: 33 340 wmic.exe Token: 34 340 wmic.exe Token: 35 340 wmic.exe Token: SeIncreaseQuotaPrivilege 340 wmic.exe Token: SeSecurityPrivilege 340 wmic.exe Token: SeTakeOwnershipPrivilege 340 wmic.exe Token: SeLoadDriverPrivilege 340 wmic.exe Token: SeSystemProfilePrivilege 340 wmic.exe Token: SeSystemtimePrivilege 340 wmic.exe Token: SeProfSingleProcessPrivilege 340 wmic.exe Token: SeIncBasePriorityPrivilege 340 wmic.exe Token: SeCreatePagefilePrivilege 340 wmic.exe Token: SeBackupPrivilege 340 wmic.exe Token: SeRestorePrivilege 340 wmic.exe Token: SeShutdownPrivilege 340 wmic.exe Token: SeDebugPrivilege 340 wmic.exe Token: SeSystemEnvironmentPrivilege 340 wmic.exe Token: SeRemoteShutdownPrivilege 340 wmic.exe Token: SeUndockPrivilege 340 wmic.exe Token: SeManageVolumePrivilege 340 wmic.exe Token: 33 340 wmic.exe Token: 34 340 wmic.exe Token: 35 340 wmic.exe Token: 33 968 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 968 AUDIODG.EXE Token: 33 968 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 968 AUDIODG.EXE Token: 33 1060 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1060 AUDIODG.EXE Token: 33 1060 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1060 AUDIODG.EXE Token: 33 1164 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1164 AUDIODG.EXE Token: 33 1164 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1164 AUDIODG.EXE Token: 33 1360 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1360 AUDIODG.EXE Token: 33 1360 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1360 AUDIODG.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
wordupd.exedescription pid Process procid_target PID 1980 wrote to memory of 340 1980 wordupd.exe 33 PID 1980 wrote to memory of 340 1980 wordupd.exe 33 PID 1980 wrote to memory of 340 1980 wordupd.exe 33 PID 1980 wrote to memory of 340 1980 wordupd.exe 33
Processes
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C:\Users\Admin\AppData\Local\Temp\wordupd.exe"C:\Users\Admin\AppData\Local\Temp\wordupd.exe"1⤵
- 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:1980 -
C:\Windows\system32\wbem\wmic.exe"C:\ai\..\Windows\fooy\..\system32\dpiu\tg\..\..\wbem\lk\qvy\..\..\wmic.exe" shadowcopy delete2⤵
- Suspicious use of AdjustPrivilegeToken
PID:340
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:652
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{3F6B5E16-092A-41ED-930B-0B4125D91D4E}1⤵PID:548
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x1801⤵
- Suspicious use of AdjustPrivilegeToken
PID:968
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{3F6B5E16-092A-41ED-930B-0B4125D91D4E}1⤵PID:1508
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x40c1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1060
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{3F6B5E16-092A-41ED-930B-0B4125D91D4E}1⤵PID:1972
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x4081⤵
- Suspicious use of AdjustPrivilegeToken
PID:1164
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{3F6B5E16-092A-41ED-930B-0B4125D91D4E}1⤵PID:1884
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x4541⤵
- Suspicious use of AdjustPrivilegeToken
PID:1360