Analysis
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max time kernel
151s -
max time network
168s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
02-12-2022 14:16
Behavioral task
behavioral1
Sample
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
Resource
win10v2004-20220812-en
General
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Target
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe
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Size
635KB
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MD5
0d75761eaf8a4e85a54b6a46402c5ba8
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SHA1
fc3f455daeb7337c95490a55ef170f14d7aac6af
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SHA256
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29
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SHA512
8227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79
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SSDEEP
12288:jwABK90BOe/x9lPAYvxPQVjdsAY2XjWlnlpTMMXG91uhKIXn/D:jwAcu99lPzvxP+Bsz2XjWTRMQckkIXn7
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe" 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe -
Executes dropped EXE 1 IoCs
Processes:
winupdate.exepid process 4308 winupdate.exe -
Checks BIOS information in registry 2 TTPs 3 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exeexplorer.exewinupdate.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate winupdate.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe" 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exedescription pid process target process PID 3912 set thread context of 4744 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe explorer.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 12 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
explorer.exewinupdate.exe87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString winupdate.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier winupdate.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier explorer.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 winupdate.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier winupdate.exe -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exeexplorer.exewinupdate.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier winupdate.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
Processes:
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exeexplorer.exewinupdate.exedescription pid process Token: SeIncreaseQuotaPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeSecurityPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeTakeOwnershipPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeLoadDriverPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeSystemProfilePrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeSystemtimePrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeProfSingleProcessPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeIncBasePriorityPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeCreatePagefilePrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeBackupPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeRestorePrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeShutdownPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeDebugPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeSystemEnvironmentPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeChangeNotifyPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeRemoteShutdownPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeUndockPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeManageVolumePrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeImpersonatePrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeCreateGlobalPrivilege 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: 33 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: 34 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: 35 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: 36 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe Token: SeIncreaseQuotaPrivilege 4744 explorer.exe Token: SeSecurityPrivilege 4744 explorer.exe Token: SeTakeOwnershipPrivilege 4744 explorer.exe Token: SeLoadDriverPrivilege 4744 explorer.exe Token: SeSystemProfilePrivilege 4744 explorer.exe Token: SeSystemtimePrivilege 4744 explorer.exe Token: SeProfSingleProcessPrivilege 4744 explorer.exe Token: SeIncBasePriorityPrivilege 4744 explorer.exe Token: SeCreatePagefilePrivilege 4744 explorer.exe Token: SeBackupPrivilege 4744 explorer.exe Token: SeRestorePrivilege 4744 explorer.exe Token: SeShutdownPrivilege 4744 explorer.exe Token: SeDebugPrivilege 4744 explorer.exe Token: SeSystemEnvironmentPrivilege 4744 explorer.exe Token: SeChangeNotifyPrivilege 4744 explorer.exe Token: SeRemoteShutdownPrivilege 4744 explorer.exe Token: SeUndockPrivilege 4744 explorer.exe Token: SeManageVolumePrivilege 4744 explorer.exe Token: SeImpersonatePrivilege 4744 explorer.exe Token: SeCreateGlobalPrivilege 4744 explorer.exe Token: 33 4744 explorer.exe Token: 34 4744 explorer.exe Token: 35 4744 explorer.exe Token: 36 4744 explorer.exe Token: SeIncreaseQuotaPrivilege 4308 winupdate.exe Token: SeSecurityPrivilege 4308 winupdate.exe Token: SeTakeOwnershipPrivilege 4308 winupdate.exe Token: SeLoadDriverPrivilege 4308 winupdate.exe Token: SeSystemProfilePrivilege 4308 winupdate.exe Token: SeSystemtimePrivilege 4308 winupdate.exe Token: SeProfSingleProcessPrivilege 4308 winupdate.exe Token: SeIncBasePriorityPrivilege 4308 winupdate.exe Token: SeCreatePagefilePrivilege 4308 winupdate.exe Token: SeBackupPrivilege 4308 winupdate.exe Token: SeRestorePrivilege 4308 winupdate.exe Token: SeShutdownPrivilege 4308 winupdate.exe Token: SeDebugPrivilege 4308 winupdate.exe Token: SeSystemEnvironmentPrivilege 4308 winupdate.exe Token: SeChangeNotifyPrivilege 4308 winupdate.exe Token: SeRemoteShutdownPrivilege 4308 winupdate.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exedescription pid process target process PID 3912 wrote to memory of 4744 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe explorer.exe PID 3912 wrote to memory of 4744 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe explorer.exe PID 3912 wrote to memory of 4744 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe explorer.exe PID 3912 wrote to memory of 4744 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe explorer.exe PID 3912 wrote to memory of 4744 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe explorer.exe PID 3912 wrote to memory of 4308 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe winupdate.exe PID 3912 wrote to memory of 4308 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe winupdate.exe PID 3912 wrote to memory of 4308 3912 87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe winupdate.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe"C:\Users\Admin\AppData\Local\Temp\87dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29.exe"1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3912 -
C:\Windows\SysWOW64\explorer.exe"C:\Windows\SysWOW64\explorer.exe"2⤵
- Checks BIOS information in registry
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:4744 -
C:\Windupdt\winupdate.exe"C:\Windupdt\winupdate.exe"2⤵
- Executes dropped EXE
- Checks BIOS information in registry
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:4308
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\Windupdt\winupdate.exeFilesize
635KB
MD50d75761eaf8a4e85a54b6a46402c5ba8
SHA1fc3f455daeb7337c95490a55ef170f14d7aac6af
SHA25687dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29
SHA5128227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79
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C:\Windupdt\winupdate.exeFilesize
635KB
MD50d75761eaf8a4e85a54b6a46402c5ba8
SHA1fc3f455daeb7337c95490a55ef170f14d7aac6af
SHA25687dea80920507993972b2c91a64d3265f42a481cca5b70132b0541cdc718eb29
SHA5128227d60b86ca48b2b0dcea23e8e371eb64152168637c1640f79f6e4bb818300b8c742c1586d094f135fc7eaf6a56e08f7000c278d5c445e13147857a58c17c79
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memory/4308-136-0x0000000000000000-mapping.dmp
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memory/4744-132-0x0000000000000000-mapping.dmp
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memory/4744-133-0x0000000000400000-0x00000000004B0000-memory.dmpFilesize
704KB
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memory/4744-134-0x0000000000400000-0x00000000004B0000-memory.dmpFilesize
704KB
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memory/4744-135-0x0000000000400000-0x00000000004B0000-memory.dmpFilesize
704KB
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memory/4744-139-0x0000000000400000-0x00000000004B0000-memory.dmpFilesize
704KB
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memory/4744-140-0x0000000000400000-0x00000000004B0000-memory.dmpFilesize
704KB