Analysis
- max time kernel
149s - max time network
148s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
25/08/2026, 13:33
Behavioral task
behavioral1
Sample
75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe
Resource
win10v2004-20260513-en
windows10-2004-x64
18 signatures
150 seconds
General
- Target 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe
- Size 4.7MB
- Sample260825-qts5hashph
- SHA256 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae
- MD5 6598ee0afbad1ab51a9ffe26f670404a
- SHA1 5f06f2a85b78a1dd696204555d6f9d3622588bfd
- SHA512 6b30b3c07b0c5b29ac5b6abf606f116faed7259ce89dbb70a3a842ecca41ded6b17096380604f062edff9df584ccca8e6a71057f4175651c3cb08975dd4b0737
- SSDEEP 98304:3dRAWSH6aEBSGZu5uqk0vCqxYkiOWt631fQoDR0YGXD3R:3TNSbEktAj3kpWt631fnQXD3
- TLSH T1AE3633F0C5132FBDFC409B310085A928A1BE2F94E56B81BD4B5535373AFB2429E627D6
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Extracted
Family
-
bdaejec
C2
-
ddos.dnsnb8.net
Signatures
- Detects Bdaejec Backdoor. 1 IoCs
Bdaejec is backdoor written in C++.
resource yara_rule behavioral2/memory/4876-156-0x0000000000D80000-0x0000000000D89000-memory.dmp family_bdaejec_backdoor - Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe -
resource yara_rule behavioral2/files/0x000b000000011377-6.dat aspack_v212_v242 - 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\SystemBiosVersion 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe - Executes dropped EXE 1 IoCs
pid Process 4876 Dyku.exe -
resource yara_rule behavioral2/memory/2004-0-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-8-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-9-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-17-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-154-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-155-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-158-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-160-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-162-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-164-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-166-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-168-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-170-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-172-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-174-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-176-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-178-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-180-0x0000000000400000-0x0000000000F3D000-memory.dmp themida behavioral2/memory/2004-182-0x0000000000400000-0x0000000000F3D000-memory.dmp themida - Checks whether UAC is enabled 1 TTPs 1 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe - Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 2004 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe -
resource yara_rule behavioral2/memory/2004-19-0x0000000003010000-0x000000000301B000-memory.dmp upx behavioral2/memory/2004-20-0x0000000003010000-0x000000000301B000-memory.dmp upx behavioral2/memory/2004-157-0x0000000003010000-0x000000000301B000-memory.dmp upx - Drops file in Program Files directory 64 IoCs
description ioc Process File opened for modification C:\Program Files\Microsoft Office\root\Office16\msoia.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\MSQRY32.EXE Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Client\AppVLP.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Integration\Integrator.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroBroker.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\javafxpackager.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\jdeps.exe Dyku.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\java.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\OLicenseHeartbeat.exe Dyku.exe File opened for modification C:\Program Files\Windows Defender\MpDlpService.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\pi_brokers\32BitMAPIBroker.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\SETLANG.EXE Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\AppSharingHookController.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\Common.ShowHelp.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroLayoutRecognizer\AcroLayoutRecognizer.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Client\AppVDllSurrogate32.exe Dyku.exe File opened for modification C:\Program Files\7-Zip\7zFM.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\jre\bin\jp2launcher.exe Dyku.exe File opened for modification C:\Program Files\Windows Defender\MpCopyAccelerator.exe Dyku.exe File opened for modification C:\Program Files\Google\Chrome\Application\140.0.7339.81\os_update_handler.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\jre\bin\kinit.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\msoev.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AdobeCollabSync.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\LogTransport2.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\VPREVIEW.EXE Dyku.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\jjs.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\msoasb.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\officeappguardwin32.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\XLICONS.EXE Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\DATABASECOMPARE.EXE Dyku.exe File opened for modification C:\Program Files (x86)\Windows Mail\wab.exe Dyku.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\jabswitch.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\MSOHTMED.EXE Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\jstatd.exe Dyku.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\ktab.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\Office16\OSPPREARM.EXE Dyku.exe File opened for modification C:\Program Files\Windows Defender\DlpUserAgent.exe Dyku.exe File opened for modification C:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\keytool.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\excelcnv.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\protocolhandler.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Source Engine\OSE.EXE Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\Common.DBConnection64.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office 15\ClientX64\OfficeClickToRun.exe Dyku.exe File opened for modification C:\Program Files\Windows Defender Advanced Threat Protection\SenseImdsCollector.exe Dyku.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\java-rmi.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroTextExtractor.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\wow_helper.exe Dyku.exe File opened for modification C:\Program Files (x86)\Mozilla Maintenance Service\Uninstall.exe Dyku.exe File opened for modification C:\Program Files (x86)\Windows Photo Viewer\ImagingDevices.exe Dyku.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\reader_sl.exe Dyku.exe File opened for modification C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\createdump.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\idlj.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\jar.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\java.exe Dyku.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\rmid.exe Dyku.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\filecompare.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\appletviewer.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\javah.exe Dyku.exe File opened for modification C:\Program Files\Windows Defender Advanced Threat Protection\SenseNdr.exe Dyku.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\javaw.exe Dyku.exe File opened for modification C:\Program Files\Java\jdk-1.8\bin\javaw.exe Dyku.exe - System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Dyku.exe - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2004 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe 2004 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe - Suspicious use of SetWindowsHookEx 4 IoCs
pid Process 2004 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe 2004 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe 2004 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe 2004 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 2004 wrote to memory of 4876 2004 75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe"C:\Users\Admin\AppData\Local\Temp\75d8cb658d7e67754941d0540e3f03c8a16027130ac417d06f333780bc37adae.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2004 -
C:\Users\Admin\AppData\Local\Temp\Dyku.exeC:\Users\Admin\AppData\Local\Temp\Dyku.exe2⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4876
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\66AE092D.exe
- Size 1B
- SHA256 08f271887ce94707da822d5263bae19d5519cb3614e0daedc4c7ce5dab7473f1
- MD5 69691c7bdcc3ce6d5d8a1361f22d04ac
- SHA1 c63ae6dd4fc9f9dda66970e827d13f7c73fe841c
- SHA512 253405e03b91441a6dd354a9b72e040068b1bfe10e83eb1a64a086c05525d8ccae2bf09130c624af50d55c3522a4fbb7c18cfc8dd843e5f4801d9ad2b5164b12
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Temp\Dyku.exe
- Size 15KB
- SHA256 97cca80dc2e18c0a30c5095580c61a5f3fda562689bbd59acada4de3579cb158
- MD5 5a7f0a75d116bf68e562f7c275c49897
- SHA1 0cacdf6b4212cdf4e89d8a692e1eae76d949d18e
- SHA512 230314e10d4f792f2d6fae27acd66f4a0b8189775a7366e2fb289c0964eea44cdfeab12e5d12408d6ac1df469bdbe489526a51b54bd6d343f481904df5e6ab92
- SSDEEP 384:QXZQaD7U8iu4YsAa7ZA0UvH2lsRv21yW7GbAxur6+Y9PffPz:IQGPL4vzZq2o9W7GsxBbPr
- TLSH T14C62BFB34FC098FFC4CD353340853687CB7B4630DABA617F826288772895E15AC55495
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Temp\login.ini
- Size 637B
- SHA256 dabf60c5039bf5d1a488e8cc79393f3a247ddfa70e5339c9d0ba574eb39e3b11
- MD5 c27dd3447818c7f65e2f6a5bdc727658
- SHA1 d629055b3bde069476e4fc2f415275e970080f87
- SHA512 286932caa1c7774a68b53395ec4f9e41801646705563a9ffc92d1cfde710aa240692e3b50fb88ca0446b02ffbf4de82df913a6c1cc4341c4c7bedd5d379384f8
- TLSH T1CDF0FF2477408C5C08C9F121C82806B8B347781048143FF2DBFBD8CB1E41EE2650565E
- MD5 SHA1 SHA512 TLSH
- Path C:\Users\Admin\AppData\Local\Temp\login.ini
- Size 649B
- SHA256 14ed055d093edf97b460b2492f30ce7abd604ee29e4c581effc36409a28a48f6
- MD5 3057d595fa091a03d2f973d700bbcff3
- SHA1 32d5e53180b4d3abfda5aad634efa8e0dfb436d9
- SHA512 9440ca81684605778b003de4bee851a3e8531e59698f0b3477225246643dfb155e5d59d25df3c8c3d702f509f43b27b87224c1612c8f2cdc13e287230063799b
- TLSH T1A9F0FF2477418C5C09D9F121C87806B9B387781048143FF2DBFBC8CB1E41EE2650565E
- MD5 SHA1 SHA512 TLSH