Analysis
- max time kernel
149s - max time network
153s - 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, 11:25
Behavioral task
behavioral1
Sample
2026-08-24_67af024421382588309cd90e63cb6522_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe
Resource
win10v2004-20260513-en
windows10-2004-x64
9 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-24_67af024421382588309cd90e63cb6522_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe
Resource
win11ltsc2024-20260709-en
windows11-ltsc_2024-x64
10 signatures
150 seconds
General
- Target 2026-08-24_67af024421382588309cd90e63cb6522_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe
- Size 9.4MB
- Sample260825-njgbvaxxav
- SHA256 5c3f4bc97175eeaa3883d34d50674274b87c0cc5aa61536cb0bc2a98b801ae7b
- MD5 67af024421382588309cd90e63cb6522
- SHA1 b2498ca4a06a1f4aaf44f2ce4d1fad5932818dc3
- SHA512 30f398f79cff88521b57f446f6978906503bd91a69f8f26665ada9fbd4d9dfec130971410d07445dd5936c1701b454ed8e4ea95edf4c4f0d3d7729c3a5a8abdc
- SSDEEP 98304:tnUm8UyBv78HEFfNHS5rpiD0La3aLkBo6DjD7d/7LapIOLapIoma:t18U9EFfKp7+NDjD7dDcIOcIna
- TLSH T14CA69D2274528079E2498071DF9AAB71C7947C694BF181EB7640BBE62F736C23E35F21
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
Malware Config
Signatures
- Detects Fesber payload 13 IoCs
resource yara_rule behavioral2/files/0x000a000000011390-4.dat family_fesber behavioral2/files/0x000600000001b8ae-16.dat family_fesber behavioral2/memory/4584-470-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-781-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1077-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1281-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1282-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1283-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1284-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1286-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1288-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1290-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber behavioral2/memory/4584-1291-0x0000000000400000-0x000000000041B000-memory.dmp family_fesber - Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "Explorer.exe fsb.exe" tmp240714781.exe - Executes dropped EXE 1 IoCs
pid Process 4584 tmp240714781.exe - Drops file in System32 directory 3 IoCs
description ioc Process File created C:\Windows\SysWOW64\fsb.stb tmp240714781.exe File created C:\Windows\SysWOW64\fsb.tmp tmp240714781.exe File opened for modification C:\Windows\SysWOW64\fsb.tmp tmp240714781.exe -
resource yara_rule behavioral2/memory/2460-0-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/memory/2460-12-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/files/0x000600000001b8ae-16.dat upx - Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\Common.ShowHelp.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.185.27\MicrosoftEdgeUpdateCore.exe- tmp240714781.exe File created C:\Program Files\7-Zip\Uninstall.exe tmp240714781.exe File created C:\Program Files\Common Files\microsoft shared\OFFICE16\LICLUA.EXE tmp240714781.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\MSOICONS.EXE- tmp240714781.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\AppSharingHookController.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\pwahelper.exe- tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\jconsole.exe tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\rmid.exe tmp240714781.exe File created C:\Program Files\Microsoft Office\root\Office16\misc.exe- tmp240714781.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX64\Microsoft Analysis Services\AS OLEDB\140\SQLDumper.exe tmp240714781.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\filecompare.exe tmp240714781.exe File created C:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe tmp240714781.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\createdump.exe tmp240714781.exe File created C:\Program Files\Microsoft Office\Office16\OSPPREARM.EXE- tmp240714781.exe File created C:\Program Files\Microsoft Office\root\Integration\Integrator.exe tmp240714781.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\Common.DBConnection.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_disable\1.3.195.65\MicrosoftEdgeUpdateBroker.exe- tmp240714781.exe File created C:\Program Files\Microsoft Office\root\Client\AppVLP.exe tmp240714781.exe File created C:\Program Files (x86)\Common Files\Oracle\Java\javapath\javaws.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_disable\Download\{56EB18F8-B008-4CBD-B6D2-8C97FE7E9062}\139.0.3405.125\MicrosoftEdge_X64_139.0.3405.125.exe tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\notification_helper.exe tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\javapackager.exe- tmp240714781.exe File created C:\Program Files\Internet Explorer\ieinstal.exe- tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\schemagen.exe- tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\javaw.exe- tmp240714781.exe File created C:\Program Files\Microsoft Office\root\Office16\VPREVIEW.EXE- tmp240714781.exe File created C:\Program Files\Mozilla Firefox\crashreporter.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeCore\139.0.3405.125\elevation_service.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.185.27\MicrosoftEdgeUpdateComRegisterShell64.exe tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\ktab.exe- tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\orbd.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_disable\MicrosoftEdgeUpdate.exe- tmp240714781.exe File created C:\Program Files\Common Files\microsoft shared\VSTO\10.0\VSTOInstaller.exe- tmp240714781.exe File created C:\Program Files\Java\jre-1.8\bin\keytool.exe- tmp240714781.exe File created C:\Program Files\Microsoft Office\root\Office16\NAMECONTROLSERVER.EXE tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeCore\122.0.2365.106\notification_click_helper.exe tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\extcheck.exe tmp240714781.exe File created C:\Program Files\Microsoft Office\root\Office16\MSOUC.EXE- tmp240714781.exe File created C:\Program Files\Mozilla Firefox\plugin-container.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.185.27\MicrosoftEdgeUpdateBroker.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_disable\1.3.195.65\MicrosoftEdgeUpdate.exe- tmp240714781.exe File created C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE- tmp240714781.exe File created C:\Program Files\Internet Explorer\ielowutil.exe- tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\jjs.exe tmp240714781.exe File created C:\Program Files\Microsoft Office\root\Office16\SETLANG.EXE tmp240714781.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\ADelRCP.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_disable\Download\{56EB18F8-B008-4CBD-B6D2-8C97FE7E9062}\139.0.3405.125\MicrosoftEdge_X64_139.0.3405.125.exe- tmp240714781.exe File created C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\chrmstp.exe tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\javac.exe tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\javadoc.exe tmp240714781.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\MSOXMLED.EXE- tmp240714781.exe File created C:\Program Files\Mozilla Firefox\updater.exe- tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeCore\122.0.2365.106\BHO\ie_to_edge_stub.exe- tmp240714781.exe File created C:\Program Files\7-Zip\7zFM.exe tmp240714781.exe File created C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevated_tracing_service.exe- tmp240714781.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\FullTrustNotifier.exe tmp240714781.exe File created C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARMHelper.exe- tmp240714781.exe File created C:\Program Files (x86)\Common Files\Java\Java Update\jaureg.exe tmp240714781.exe File created C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\identity_helper.exe tmp240714781.exe File created C:\Program Files\Java\jdk-1.8\bin\servertool.exe tmp240714781.exe File created C:\Program Files\Microsoft Office\root\Integration\Addons\OneDriveSetup.exe tmp240714781.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 2026-08-24_67af024421382588309cd90e63cb6522_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language tmp240714781.exe - Suspicious behavior: LoadsDriver 1 IoCs
pid 4 - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 2460 wrote to memory of 4584 2460 2026-08-24_67af024421382588309cd90e63cb6522_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-24_67af024421382588309cd90e63cb6522_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-24_67af024421382588309cd90e63cb6522_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2460 -
C:\Users\Admin\AppData\Local\Temp\tmp240714781.exeC:\Users\Admin\AppData\Local\Temp\tmp240714781.exe2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4584
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Program Files\7-Zip\7z.exe-
- Size 10.0MB
- SHA256 8f7e684f6f3e41d92937fbfb8d26927e1e00e325b106cf3ac4d624cb2a4871ed
- MD5 610ffaca64adf6e5074a51aa9ad7f604
- SHA1 be5b996cdc5938e17af65da638a8c857b33a6f41
- SHA512 57f1abf33e009055b2f9bfe099e41a9b57ad78df9b4b33421ca05fab6e465b2df5e0bcb729c12d5d18f07e53905c00e7b0c9fe25a2857387f2d7dd7f109f2456
- SSDEEP 98304:tnUm8UyBv78HEFfNHS5rpiD0La3aLkBo6DjD7d/7LapIOLapIomaDjo:t18U9EFfKp7+NDjD7dDcIOcInano
- TLSH T1D1B6AE22B4528179E2598071CF9AAB75C7943C694BF181DB3640BBE92F737C23E35B21
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Temp\tmp240714781.exe
- Size 9.4MB
- SHA256 bfeb250d81cbc4e11ad4da85a103ed2cfa8643ca6c68156457a2e67c2e0ef103
- MD5 2483318b07a6bd2367c8ae15f8915b30
- SHA1 5c5743fc32a26a481239072701cb7cf626677e56
- SHA512 6bcae09ce42fc5a67d17a90579400c6a0960b402db8cc5da10bfc8ee55157fb183babb99a464517ff8fed3af9d4c68d2a293f0f79dd4c921ea5752051cd9d2c5
- SSDEEP 98304:YnUm8UyBv78HEFfNHS5rpiD0La3aLkBo6DjD7d/7LapIOLapIoma:Y18U9EFfKp7+NDjD7dDcIOcIna
- TLSH T1E7A69D2274528079E2498071DF9AAB71C7947C694BF181EB7640BBE62F736C23E35F21
- MD5 SHA1 SHA512 SSDEEP TLSH