Analysis
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max time kernel
164s -
max time network
173s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
16-02-2022 23:00
Static task
static1
Behavioral task
behavioral1
Sample
51f987ca424efa1e278fef26c8b7f26ba44ea7aa2d19f5b4dae1d9818877fe74.dll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
51f987ca424efa1e278fef26c8b7f26ba44ea7aa2d19f5b4dae1d9818877fe74.dll
Resource
win10v2004-en-20220113
General
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Target
51f987ca424efa1e278fef26c8b7f26ba44ea7aa2d19f5b4dae1d9818877fe74.dll
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Size
594KB
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MD5
6af23009c00136a035654607fd423a24
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SHA1
5375aa02c6dab85ece057a2e0d3603fc02f04f52
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SHA256
51f987ca424efa1e278fef26c8b7f26ba44ea7aa2d19f5b4dae1d9818877fe74
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SHA512
ed82a43c12c459bf3cf09b03d4db7399a76c7bcfc16f88eea334f4db1ec2768664900cb6a4c92e659112e7bd126ebf35eed32beb66f20c5d201ede1d4946b3db
Malware Config
Extracted
C:\DECRYPT-FILES.txt
maze
http://aoacugmutagkwctu.onion/6c2b0cc8b45c5c18
https://mazedecrypt.top/6c2b0cc8b45c5c18
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 7 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File opened for modification C:\Users\Admin\Pictures\InitializeExit.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\InitializeExit.tiff => C:\Users\Admin\Pictures\InitializeExit.tiff.M5PHyq regsvr32.exe File renamed C:\Users\Admin\Pictures\ResolveInvoke.png => C:\Users\Admin\Pictures\ResolveInvoke.png.Bkr5 regsvr32.exe File renamed C:\Users\Admin\Pictures\UpdateShow.tif => C:\Users\Admin\Pictures\UpdateShow.tif.wIe12 regsvr32.exe File renamed C:\Users\Admin\Pictures\ApproveNew.crw => C:\Users\Admin\Pictures\ApproveNew.crw.VAjIj regsvr32.exe File renamed C:\Users\Admin\Pictures\AssertUnlock.crw => C:\Users\Admin\Pictures\AssertUnlock.crw.VAjIj regsvr32.exe File renamed C:\Users\Admin\Pictures\ClearReset.raw => C:\Users\Admin\Pictures\ClearReset.raw.VAjIj regsvr32.exe -
Drops startup file 4 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\6c2b0cc8b45c5c18.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\6c2b0cc8b45c5c18.tmp regsvr32.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\DECRYPT-FILES.txt regsvr32.exe -
Drops file in Program Files directory 25 IoCs
description ioc Process File opened for modification C:\Program Files\OpenMount.pub regsvr32.exe File opened for modification C:\Program Files\SetResolve.mp2 regsvr32.exe File created C:\Program Files\DECRYPT-FILES.txt regsvr32.exe File opened for modification C:\Program Files\6c2b0cc8b45c5c18.tmp regsvr32.exe File opened for modification C:\Program Files\ConfirmUnblock.htm regsvr32.exe File opened for modification C:\Program Files\EditPop.pptm regsvr32.exe File opened for modification C:\Program Files\EnableJoin.wma regsvr32.exe File opened for modification C:\Program Files\ExportCheckpoint.MOD regsvr32.exe File opened for modification C:\Program Files\WatchUnprotect.bat regsvr32.exe File opened for modification C:\Program Files\CloseExit.mp4 regsvr32.exe File opened for modification C:\Program Files\LockClear.tiff regsvr32.exe File opened for modification C:\Program Files\PingOptimize.mpeg regsvr32.exe File opened for modification C:\Program Files\SetStop.ico regsvr32.exe File opened for modification C:\Program Files\SwitchUnregister.pptm regsvr32.exe File opened for modification C:\Program Files\ApproveRemove.pps regsvr32.exe File opened for modification C:\Program Files\ApproveResolve.mp2 regsvr32.exe File opened for modification C:\Program Files\BlockUndo.zip regsvr32.exe File opened for modification C:\Program Files\FormatRequest.3gp2 regsvr32.exe File opened for modification C:\Program Files (x86)\6c2b0cc8b45c5c18.tmp regsvr32.exe File opened for modification C:\Program Files\InstallWrite.mhtml regsvr32.exe File opened for modification C:\Program Files\ResizeSearch.xlsb regsvr32.exe File opened for modification C:\Program Files\SplitRestart.bat regsvr32.exe File opened for modification C:\Program Files\SwitchSubmit.html regsvr32.exe File opened for modification C:\Program Files\UpdateUnblock.vsx regsvr32.exe File created C:\Program Files (x86)\DECRYPT-FILES.txt regsvr32.exe -
Enumerates system info in registry 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS SearchApp.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU SearchApp.exe -
Modifies registry class 30 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\www.bing.com SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\EdpDomStorage SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\www.bing.com\ = "173" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "140" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\bing.com\Total = "140" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "1702" SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\SOFTWARE\Microsoft\Speech_OneCore\Isolated\ohDO1Sgy3MzgdEgEb4WYfDS4ei SearchApp.exe Set value (str) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:" SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\bing.com\Total = "2258" SearchApp.exe Set value (str) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:" SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DomStorageState SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\bing.com SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\www.bing.com\ = "140" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "2258" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "5820" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\bing.com\Total = "5820" SearchApp.exe Set value (str) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\SOFTWARE\Microsoft\Speech_OneCore\Isolated\ohDO1Sgy3MzgdEgEb4WYfDS4ei = "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Speech_OneCore\\Recognizers\\Tokens\\MS-1033-110-WINMO-DNN" SearchApp.exe Set value (str) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\bing.com\Total = "173" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\www.bing.com\ = "2258" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\www.bing.com\ = "5820" SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\bing.com SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\Total SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "173" SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\MuiCache SearchApp.exe Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\www.bing.com SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\www.bing.com\ = "1702" SearchApp.exe Set value (int) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\bing.com\Total = "1702" SearchApp.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2008 regsvr32.exe 2008 regsvr32.exe -
Suspicious use of AdjustPrivilegeToken 24 IoCs
description pid Process Token: SeBackupPrivilege 2604 vssvc.exe Token: SeRestorePrivilege 2604 vssvc.exe Token: SeAuditPrivilege 2604 vssvc.exe Token: SeIncreaseQuotaPrivilege 4420 wmic.exe Token: SeSecurityPrivilege 4420 wmic.exe Token: SeTakeOwnershipPrivilege 4420 wmic.exe Token: SeLoadDriverPrivilege 4420 wmic.exe Token: SeSystemProfilePrivilege 4420 wmic.exe Token: SeSystemtimePrivilege 4420 wmic.exe Token: SeProfSingleProcessPrivilege 4420 wmic.exe Token: SeIncBasePriorityPrivilege 4420 wmic.exe Token: SeCreatePagefilePrivilege 4420 wmic.exe Token: SeBackupPrivilege 4420 wmic.exe Token: SeRestorePrivilege 4420 wmic.exe Token: SeShutdownPrivilege 4420 wmic.exe Token: SeDebugPrivilege 4420 wmic.exe Token: SeSystemEnvironmentPrivilege 4420 wmic.exe Token: SeRemoteShutdownPrivilege 4420 wmic.exe Token: SeUndockPrivilege 4420 wmic.exe Token: SeManageVolumePrivilege 4420 wmic.exe Token: 33 4420 wmic.exe Token: 34 4420 wmic.exe Token: 35 4420 wmic.exe Token: 36 4420 wmic.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4088 SearchApp.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 1804 wrote to memory of 2008 1804 regsvr32.exe 82 PID 1804 wrote to memory of 2008 1804 regsvr32.exe 82 PID 1804 wrote to memory of 2008 1804 regsvr32.exe 82 PID 2008 wrote to memory of 4420 2008 regsvr32.exe 104 PID 2008 wrote to memory of 4420 2008 regsvr32.exe 104
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\51f987ca424efa1e278fef26c8b7f26ba44ea7aa2d19f5b4dae1d9818877fe74.dll1⤵
- Suspicious use of WriteProcessMemory
PID:1804 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\51f987ca424efa1e278fef26c8b7f26ba44ea7aa2d19f5b4dae1d9818877fe74.dll2⤵
- Modifies extensions of user files
- Drops startup file
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2008 -
C:\Windows\system32\wbem\wmic.exe"C:\f\drvhp\j\..\..\..\Windows\wdpc\eviik\yuftj\..\..\..\system32\xfgr\..\wbem\kdllt\rq\..\..\wmic.exe" shadowcopy delete3⤵
- Suspicious use of AdjustPrivilegeToken
PID:4420
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2604
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵
- Enumerates system info in registry
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4088
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p -s BITS1⤵PID:1276
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k appmodel -p -s camsvc1⤵PID:4960