Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system - submitted
25/03/2024, 17:36
Behavioral task
behavioral1
Sample
de92fbec120a28b67b6889ec21f4be51.exe
Resource
win7-20240221-en
windows7-x64
22 signatures
150 seconds
Behavioral task
behavioral2
Sample
de92fbec120a28b67b6889ec21f4be51.exe
Resource
win10v2004-20231215-en
windows10-2004-x64
22 signatures
150 seconds
General
- Target de92fbec120a28b67b6889ec21f4be51.exe
- Size 812KB
- Sample240325-v6wtdaec42
- SHA256 609d28163bc291bac0a6fed62a734b989eba03827df069f7aca7ee2872b3f3ae
- MD5 de92fbec120a28b67b6889ec21f4be51
- SHA1 55d18e5e0b2fdf22bf424f3b9f30fa323f608232
- SHA512 1e0081d45f47e438cdd34f33c8d23fdab16e6711ae4e1d74cef1162764ce7cb48c419196a5b7866fef07f9a5383797a50ef09e2bdf244242865f8c7b2ea7b495
- SSDEEP 12288:PaAchpWsuVtDnBsBDJIcynnC90levX4CuYf2D82T3s99+VHuNvr:yAEE3uBDhynCylQgi63O9+VuNvr
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe" de92fbec120a28b67b6889ec21f4be51.exe - Modifies firewall policy service 2 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile winupdate.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "1" winupdate.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1" winupdate.exe - Modifies security service 2 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" winupdate.exe -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" winupdate.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" winupdate.exe - Disables RegEdit via registry modification 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" winupdate.exe - Disables Task Manager via registry modification
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate winupdate.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate de92fbec120a28b67b6889ec21f4be51.exe - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation de92fbec120a28b67b6889ec21f4be51.exe - Executes dropped EXE 1 IoCs
pid Process 4968 winupdate.exe -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" winupdate.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" winupdate.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe" de92fbec120a28b67b6889ec21f4be51.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 8 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString de92fbec120a28b67b6889ec21f4be51.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier de92fbec120a28b67b6889ec21f4be51.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier de92fbec120a28b67b6889ec21f4be51.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 winupdate.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 value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier winupdate.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 de92fbec120a28b67b6889ec21f4be51.exe - Enumerates system info in registry 2 TTPs 2 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier de92fbec120a28b67b6889ec21f4be51.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier winupdate.exe - Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ de92fbec120a28b67b6889ec21f4be51.exe - Runs ping.exe 1 TTPs 1 IoCs
pid Process 2664 PING.EXE - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 4968 winupdate.exe - Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeSecurityPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeTakeOwnershipPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeLoadDriverPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeSystemProfilePrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeSystemtimePrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeProfSingleProcessPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeIncBasePriorityPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeCreatePagefilePrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeBackupPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeRestorePrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeShutdownPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeDebugPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeSystemEnvironmentPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeChangeNotifyPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeRemoteShutdownPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeUndockPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeManageVolumePrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeImpersonatePrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeCreateGlobalPrivilege 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: 33 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: 34 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: 35 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: 36 3200 de92fbec120a28b67b6889ec21f4be51.exe Token: SeIncreaseQuotaPrivilege 4968 winupdate.exe Token: SeSecurityPrivilege 4968 winupdate.exe Token: SeTakeOwnershipPrivilege 4968 winupdate.exe Token: SeLoadDriverPrivilege 4968 winupdate.exe Token: SeSystemProfilePrivilege 4968 winupdate.exe Token: SeSystemtimePrivilege 4968 winupdate.exe Token: SeProfSingleProcessPrivilege 4968 winupdate.exe Token: SeIncBasePriorityPrivilege 4968 winupdate.exe Token: SeCreatePagefilePrivilege 4968 winupdate.exe Token: SeBackupPrivilege 4968 winupdate.exe Token: SeRestorePrivilege 4968 winupdate.exe Token: SeShutdownPrivilege 4968 winupdate.exe Token: SeDebugPrivilege 4968 winupdate.exe Token: SeSystemEnvironmentPrivilege 4968 winupdate.exe Token: SeChangeNotifyPrivilege 4968 winupdate.exe Token: SeRemoteShutdownPrivilege 4968 winupdate.exe Token: SeUndockPrivilege 4968 winupdate.exe Token: SeManageVolumePrivilege 4968 winupdate.exe Token: SeImpersonatePrivilege 4968 winupdate.exe Token: SeCreateGlobalPrivilege 4968 winupdate.exe Token: 33 4968 winupdate.exe Token: 34 4968 winupdate.exe Token: 35 4968 winupdate.exe Token: 36 4968 winupdate.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4968 winupdate.exe - Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 3200 wrote to memory of 4968 3200 de92fbec120a28b67b6889ec21f4be51.exe 85 PID 3200 wrote to memory of 4968 3200 de92fbec120a28b67b6889ec21f4be51.exe 85 PID 3200 wrote to memory of 4968 3200 de92fbec120a28b67b6889ec21f4be51.exe 85 PID 3200 wrote to memory of 2988 3200 de92fbec120a28b67b6889ec21f4be51.exe 86 PID 3200 wrote to memory of 2988 3200 de92fbec120a28b67b6889ec21f4be51.exe 86 PID 3200 wrote to memory of 2988 3200 de92fbec120a28b67b6889ec21f4be51.exe 86 PID 2988 wrote to memory of 2664 2988 cmd.exe 88 PID 2988 wrote to memory of 2664 2988 cmd.exe 88 PID 2988 wrote to memory of 2664 2988 cmd.exe 88 - System policy modification 1 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion winupdate.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern winupdate.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1" winupdate.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\de92fbec120a28b67b6889ec21f4be51.exe"C:\Users\Admin\AppData\Local\Temp\de92fbec120a28b67b6889ec21f4be51.exe"1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Checks computer location settings
- Adds Run key to start application
- Checks processor information in registry
- Enumerates system info in registry
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3200 -
C:\Windupdt\winupdate.exe"C:\Windupdt\winupdate.exe"2⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- Checks BIOS information in registry
- Executes dropped EXE
- Windows security modification
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- System policy modification
PID:4968
-
-
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\_dcsc_.bat" "2⤵
- Suspicious use of WriteProcessMemory
PID:2988 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:2664
-
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\_dcsc_.bat
- Size 105B
- SHA256 d3ec096bbf8e38627cb19ee8745cd62e4add0b87b2f1cf0cfdba46e99dc8f3ab
- MD5 5649a1eb4cec5201158f84c37bca41ea
- SHA1 4e429728c630033e4cfcd9b8d462bb5fbdeaf260
- SHA512 412e965fec0d19496bc9acdc75b25bf22d5ee85b076c4ff00d2584e0fb721220d478788fd394f8e9961790d5e3edf267f37b6328da11995e167335599ead3eab
- MD5 SHA1 SHA512
- Path C:\Windupdt\winupdate.exe
- Size 812KB
- SHA256 609d28163bc291bac0a6fed62a734b989eba03827df069f7aca7ee2872b3f3ae
- MD5 de92fbec120a28b67b6889ec21f4be51
- SHA1 55d18e5e0b2fdf22bf424f3b9f30fa323f608232
- SHA512 1e0081d45f47e438cdd34f33c8d23fdab16e6711ae4e1d74cef1162764ce7cb48c419196a5b7866fef07f9a5383797a50ef09e2bdf244242865f8c7b2ea7b495
- SSDEEP 12288:PaAchpWsuVtDnBsBDJIcynnC90levX4CuYf2D82T3s99+VHuNvr:yAEE3uBDhynCylQgi63O9+VuNvr
- MD5 SHA1 SHA512 SSDEEP