Analysis
- max time kernel
150s - max time network
123s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260706-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
08/07/2026, 21:33
Behavioral task
behavioral1
Sample
Sewi.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
Sewi.exe
Resource
win11ltsc2024-20260706-en
General
- Target Sewi.exe
- Size 4.6MB
- Sample260708-1ect3sat8y
- SHA256 345ab938bcc8491cf079c29cd129e36467f6fa71817245caf3052265899f91c4
- MD5 9276d7561908fcd20d75f597ed0650cf
- SHA1 d4defddea8099ff4baaef10cb9998f429eb185fa
- SHA512 891275bc5dee953a6a57fd970fa156187018e26261c6239c10f9fc341557afcd18929d50cb55eb586d8e36c35985bc25b2b892173adb8fe5f5892bf2671d23cb
- SSDEEP 98304:hxx9NUFkQx753uWuCyyxY2zckSniCRCbm1MVCrum:hF2kQnjyV2zckSni9bwMorum
- TLSH T19526DF2172E851B8C5A6DA74CA075763CA31341C6B3C63FB138DA6E6EFB0394763C652
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Modifies visibility of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-1581435544-3586420778-2104125077-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-1581435544-3586420778-2104125077-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" svchost.exe - Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 6 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ spoolsv.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ Sewi.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ icsys.icn.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ explorer.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ spoolsv.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ svchost.exe - Sets service image path in registry 3 TTPs 1 IoCs
This determines the executable launched when a service starts. It can be used to establish persistence.
description ioc Process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\NalDrv\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\NalDrv.sys" sDQ0X.exe - Checks BIOS information in registry 2 TTPs 12 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion Sewi.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion icsys.icn.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion spoolsv.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion spoolsv.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion Sewi.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion icsys.icn.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion spoolsv.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion spoolsv.exe - Executes dropped EXE 7 IoCs
pid Process 5224 sewi.exe 5872 icsys.icn.exe 2544 sDQ0X.exe 1228 explorer.exe 2708 spoolsv.exe 5600 svchost.exe 4492 spoolsv.exe -
resource yara_rule behavioral2/memory/3496-0-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/files/0x000a0000000187c8-12.dat themida behavioral2/files/0x000700000001b8bd-26.dat themida behavioral2/memory/1228-32-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/files/0x001200000001c671-41.dat themida behavioral2/memory/2708-43-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/files/0x000700000001b813-51.dat themida behavioral2/memory/5600-53-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/4492-62-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/2708-65-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/5872-64-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/3496-66-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/1228-67-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/5600-69-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/5600-70-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/1228-79-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/1228-81-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/1228-93-0x0000000000400000-0x0000000000A0E000-memory.dmp themida behavioral2/memory/5600-94-0x0000000000400000-0x0000000000A0E000-memory.dmp themida - Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO" explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO" explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO" svchost.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO" svchost.exe - Checks whether UAC is enabled 1 TTPs 6 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA explorer.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA spoolsv.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA svchost.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA spoolsv.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA Sewi.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA icsys.icn.exe - Drops file in System32 directory 2 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\explorer.exe explorer.exe File opened for modification C:\Windows\SysWOW64\explorer.exe svchost.exe - Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 3496 Sewi.exe 5872 icsys.icn.exe 1228 explorer.exe 2708 spoolsv.exe 5600 svchost.exe 4492 spoolsv.exe - Drops file in Windows directory 7 IoCs
description ioc Process File opened for modification \??\c:\windows\resources\svchost.exe spoolsv.exe File opened for modification C:\Windows\Resources\tjud.exe explorer.exe File opened for modification C:\Windows\Resources\Themes\icsys.icn.exe Sewi.exe File created C:\Windows\SoftwareDistribution\Download\hOogK.sys sewi.exe File created C:\Windows\SoftwareDistribution\Download\sDQ0X.exe sewi.exe File opened for modification \??\c:\windows\resources\themes\explorer.exe icsys.icn.exe File opened for modification \??\c:\windows\resources\spoolsv.exe explorer.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 6 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 Sewi.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language icsys.icn.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language explorer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language svchost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language spoolsv.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 3496 Sewi.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 5872 icsys.icn.exe - Suspicious behavior: GetForegroundWindowSpam 2 IoCs
pid Process 1228 explorer.exe 5600 svchost.exe - Suspicious behavior: LoadsDriver 1 IoCs
pid Process 2544 sDQ0X.exe - Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeSystemEnvironmentPrivilege 2544 sDQ0X.exe Token: SeDebugPrivilege 2544 sDQ0X.exe Token: SeLoadDriverPrivilege 2544 sDQ0X.exe - Suspicious use of SetWindowsHookEx 12 IoCs
pid Process 3496 Sewi.exe 3496 Sewi.exe 5872 icsys.icn.exe 5872 icsys.icn.exe 1228 explorer.exe 1228 explorer.exe 2708 spoolsv.exe 2708 spoolsv.exe 5600 svchost.exe 5600 svchost.exe 4492 spoolsv.exe 4492 spoolsv.exe - Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 3496 wrote to memory of 5224 3496 Sewi.exe 88 PID 3496 wrote to memory of 5872 3496 Sewi.exe 90 PID 5224 wrote to memory of 2544 5224 sewi.exe 91 PID 5872 wrote to memory of 1228 5872 icsys.icn.exe 93 PID 1228 wrote to memory of 2708 1228 explorer.exe 94 PID 2708 wrote to memory of 5600 2708 spoolsv.exe 95 PID 5600 wrote to memory of 4492 5600 svchost.exe 96
Processes
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C:\Users\Admin\AppData\Local\Temp\Sewi.exe"C:\Users\Admin\AppData\Local\Temp\Sewi.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
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3496 -
\??\c:\users\admin\appdata\local\temp\sewi.exec:\users\admin\appdata\local\temp\sewi.exe2⤵
- Executes dropped EXE
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:5224 -
C:\Windows\SoftwareDistribution\Download\sDQ0X.exe"C:\Windows\SoftwareDistribution\Download\sDQ0X.exe" -map C:\Windows\SoftwareDistribution\Download\hOogK.sys3⤵
- Sets service image path in registry
- Executes dropped EXE
- Suspicious behavior: LoadsDriver
- Suspicious use of AdjustPrivilegeToken
PID:2544
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C:\Windows\Resources\Themes\icsys.icn.exeC:\Windows\Resources\Themes\icsys.icn.exe2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5872 -
\??\c:\windows\resources\themes\explorer.exec:\windows\resources\themes\explorer.exe3⤵
- Modifies visibility of hidden/system files in Explorer
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1228 -
\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe SE4⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2708 -
\??\c:\windows\resources\svchost.exec:\windows\resources\svchost.exe5⤵
- Modifies visibility of hidden/system files in Explorer
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5600 -
\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe PR6⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:4492
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Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
3Virtualization/Sandbox Evasion
1Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\sewi.exe
- Size 2.1MB
- SHA256 29bdf43af7fce4a48a4699f01ba35a9d23ec72109f9a8d59b84788610066b715
- MD5 2ca19d0f12d1f16f6d08b34c48593826
- SHA1 eb8a5beea1177a71a2123d666638233da57146ad
- SHA512 d9217fd4f397f1a0a81447332f563ece283db881e693034135524937775b7fbb75f97bde586d12f29b3841c4d9811d1b36d64c266fcf08983e2ea83c63d5adbd
- SSDEEP 49152:MKJhzckSniODlvlLyE/r9NCbm1M7nvUoJC+O93+x:M2zckSniCRCbm1MVCru
- TLSH T1A1A59D0172E945B8C22AC179C8039767CB61784E173913FB279899D1BFB13E45ABC7A3
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\Resources\Themes\explorer.exe
- Size 2.5MB
- SHA256 bb9e414b8229045c56c1795e7bb5fe6d51599d8b4843dc94d23571674a46f367
- MD5 3ae5809dfbfbe65f980169f2e448de6e
- SHA1 02ac64dc7154785b68b31bf96142969274f51244
- SHA512 2c823226dd7521210bf552d81dc6dc9896b26066bf106c0e939b132e0322d313dd6b73485a23194f6f939c329900218379ab33c9e537cd12bbc3066687ae5814
- SSDEEP 49152:hxmvumkQ9lY9sgUXdTPSxdQ8KX75IyuWuCjcCqWOyxq:hxx9NUFkQx753uWuCyyxq
- TLSH T192C5E12ACEE1704DCF4E59367371CE76B09F0781339A6F932C6C9581176A32729B8D4A
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\Resources\Themes\icsys.icn.exe
- Size 2.5MB
- SHA256 23b0f28e5f104e80a09ba53ab23606925496c1da489ac6f478b4e0e2fa6fc5e0
- MD5 154ead61ad11cdd203a561cde4230355
- SHA1 3a2033be74d53cb1e8fd7639318bc68b69aaa2e9
- SHA512 d3cb46760afa528da22015daad1a52a6f217166255a1a13eeb065a4958c2638bc9715bd4079aa3e88a094685d98002a4d0ce73fa138e276457cfac2d7f9886c7
- SSDEEP 49152:hxmvumkQ9lY9sgUXdTPSxdQ8KX75IyuWuCjcCqWOyxD:hxx9NUFkQx753uWuCyyxD
- TLSH T121C5D0729A94B168C4E6EEF09B0D5972653232287D9CF33F111FB3BFCDA86087625419
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\Resources\spoolsv.exe
- Size 2.5MB
- SHA256 72bc2f08447bbf52944bc26f5d64e49e438e2734bd42735c6cb375b91a9765c9
- MD5 e560a50b794228ac001b77d10b9c69af
- SHA1 7a6a44d494c244a7a899f181c4d33bba95c7b12e
- SHA512 4ddd2b56bbd844581e39ab83f48dfa397d55087c7e1fcf436ee110166d0fe699fb9ed92b0f226eb51adf4f363595e6d293c7824c10fce84004ba21d7a5de4f91
- SSDEEP 49152:hxmvumkQ9lY9sgUXdTPSxdQ8KX75IyuWuCjcCqWOyxV:hxx9NUFkQx753uWuCyyxV
- TLSH T1A1C5D0418E17B70AE45D1E31F49E63ACD20EBD50B3BBD5D8B5B640BFB1BB442DA06209
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\Resources\svchost.exe
- Size 2.5MB
- SHA256 a1244fc0ccaed1c9f7565e4833f72061ce940adfb69a55ac5944ad521ea464cc
- MD5 27806d00841e28938530a47789689a92
- SHA1 320876def16617cc24c88df948bc07cdd23eea9c
- SHA512 597a1e69ed93f057ca97a0ab1a75f744571d54cb1373d8919524d3a28078bd2802c3107bc36e1e509aecfa001faa5f070ba179b54e1c6e099e540891d7144033
- SSDEEP 49152:hxmvumkQ9lY9sgUXdTPSxdQ8KX75IyuWuCjcCqWOyxf:hxx9NUFkQx753uWuCyyxf
- TLSH T113C5D0064C03985CC7A26BF7115098467BBC06C810C2D72CA67B9B5D970DD9AABEFBC7
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\SoftwareDistribution\Download\sDQ0X.exe
- Size 260KB
- SHA256 03aefd40698cafbd48138784f362fb9a36f726fb50f262ca40695729f7b553ca
- MD5 083c6c05ac5875d0b6e997e894ca07bc
- SHA1 69d0116998e8a70db5852fccb86d45975ce88a9a
- SHA512 fb0b9994f9ddadd825476ed19a8299ef90536dae58b4f3087145ca4033a63d4ae0da944ac8bf4e71324e1b63af755ab1d82019e55de6377b00c9812ed57f3fdf
- SSDEEP 3072:EAhPo1O3uPxn1aN+NYzoJb61Xe+VUNQRHcpfqbqM8TwxAwcvTQ5pP3YNoNBWPWw4:xhPZEncAOEJb/WyIxAwt5pfYNoNoS
- TLSH T1A544AD5773A430F9E463C134C8928616E7B3BC3607658B6F1394767A5F33291AE2EB21
- MD5 SHA1 SHA512 SSDEEP TLSH