35850fc8c8d89cb0fd8a4d861bf9c19447c7ebb21a378f1d9f16ed4fbbdc9792

Analysis

max time kernel
300s
max time network
250s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
submitted
25/08/2026, 18:38

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General

Target
InstallerV31751.exe
Size 14.4MB
Sample260825-w96nesdn4y
SHA256 35850fc8c8d89cb0fd8a4d861bf9c19447c7ebb21a378f1d9f16ed4fbbdc9792
MD5 1e8dfade6e3f0ae965fc86012ca1a9bd
SHA1 08b732b555bba38b87d58cae21619e025fb25aac
SHA512 e8a42375f251a8250679a2658271dd5960368c1c3321037ba155334db9532ce45b8604b190f184ff4e90ec1aa3cd40936906ed4bd3217022fdc8117f2f27c90c
SSDEEP 393216:xlScKy14TD2hX4h7Dkh9nBKW0K1ZmuaZMkyJ+:xxKy6w4tohtBKwsZMkyJ+
TLSH
T1C0E633EA9B3AC8D4EC9A1A7599F4C2651617F17D78E6F2F29988D310C968D300C32F74
MD5 SHA1 SHA512 SSDEEP TLSH

Score

9^/10

defense_evasion execution persistence privilege_escalation themida trojan

Malware Config

Signatures

Enumerates VirtualBox registry keys 2 TTPs 4 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	NotesUpdaterPath.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	services.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	services.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	NotesUpdaterPath.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	InstallerV31751.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 2 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	NotesUpdaterPath.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	services.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
852	powershell.exe
852	powershell.exe
4516	powershell.exe

Looks for VMWare Tools registry key 2 TTPs 2 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	services.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	NotesUpdaterPath.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	InstallerV31751.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	InstallerV31751.exe

Creates a file in the Startup directory 1 TTPs 1 IoCs

A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

persistence privilege_escalation

Registry Run Keys / Startup Folder

T1547.001

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SearchService.lnk	NotesUpdaterPath.exe

Executes dropped EXE 2 IoCs

pid	Process
2724	NotesUpdaterPath.exe
4504	services.exe

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/4924-8-0x0000000000400000-0x0000000001A28000-memory.dmp	themida
behavioral2/memory/4924-9-0x0000000000400000-0x0000000001A28000-memory.dmp	themida
behavioral2/memory/4924-57-0x0000000000400000-0x0000000001A28000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	InstallerV31751.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4924	InstallerV31751.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
968	cmd.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	services.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	services.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5732	timeout.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
852	powershell.exe
852	powershell.exe
4516	powershell.exe
4516	powershell.exe
2724	NotesUpdaterPath.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe
4504	services.exe

Suspicious use of AdjustPrivilegeToken 47 IoCs

description	pid	Process
Token: SeDebugPrivilege	4924	InstallerV31751.exe
Token: SeDebugPrivilege	852	powershell.exe
Token: SeIncreaseQuotaPrivilege	852	powershell.exe
Token: SeSecurityPrivilege	852	powershell.exe
Token: SeTakeOwnershipPrivilege	852	powershell.exe
Token: SeLoadDriverPrivilege	852	powershell.exe
Token: SeSystemProfilePrivilege	852	powershell.exe
Token: SeSystemtimePrivilege	852	powershell.exe
Token: SeProfSingleProcessPrivilege	852	powershell.exe
Token: SeIncBasePriorityPrivilege	852	powershell.exe
Token: SeCreatePagefilePrivilege	852	powershell.exe
Token: SeBackupPrivilege	852	powershell.exe
Token: SeRestorePrivilege	852	powershell.exe
Token: SeShutdownPrivilege	852	powershell.exe
Token: SeDebugPrivilege	852	powershell.exe
Token: SeSystemEnvironmentPrivilege	852	powershell.exe
Token: SeRemoteShutdownPrivilege	852	powershell.exe
Token: SeUndockPrivilege	852	powershell.exe
Token: SeManageVolumePrivilege	852	powershell.exe
Token: 33	852	powershell.exe
Token: 34	852	powershell.exe
Token: 35	852	powershell.exe
Token: 36	852	powershell.exe
Token: SeIncreaseQuotaPrivilege	852	powershell.exe
Token: SeSecurityPrivilege	852	powershell.exe
Token: SeTakeOwnershipPrivilege	852	powershell.exe
Token: SeLoadDriverPrivilege	852	powershell.exe
Token: SeSystemProfilePrivilege	852	powershell.exe
Token: SeSystemtimePrivilege	852	powershell.exe
Token: SeProfSingleProcessPrivilege	852	powershell.exe
Token: SeIncBasePriorityPrivilege	852	powershell.exe
Token: SeCreatePagefilePrivilege	852	powershell.exe
Token: SeBackupPrivilege	852	powershell.exe
Token: SeRestorePrivilege	852	powershell.exe
Token: SeShutdownPrivilege	852	powershell.exe
Token: SeDebugPrivilege	852	powershell.exe
Token: SeSystemEnvironmentPrivilege	852	powershell.exe
Token: SeRemoteShutdownPrivilege	852	powershell.exe
Token: SeUndockPrivilege	852	powershell.exe
Token: SeManageVolumePrivilege	852	powershell.exe
Token: 33	852	powershell.exe
Token: 34	852	powershell.exe
Token: 35	852	powershell.exe
Token: 36	852	powershell.exe
Token: SeDebugPrivilege	4516	powershell.exe
Token: SeDebugPrivilege	2724	NotesUpdaterPath.exe
Token: SeDebugPrivilege	4504	services.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4924 wrote to memory of 852	4924	InstallerV31751.exe	84
PID 4924 wrote to memory of 4516	4924	InstallerV31751.exe	91
PID 4516 wrote to memory of 2724	4516	powershell.exe	94
PID 2724 wrote to memory of 4504	2724	NotesUpdaterPath.exe	95
PID 2724 wrote to memory of 968	2724	NotesUpdaterPath.exe	96
PID 968 wrote to memory of 5732	968	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\InstallerV31751.exe
"C:\Users\Admin\AppData\Local\Temp\InstallerV31751.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
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4924
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath @('C:\Users\Admin\AppData\Local\Temp\','C:\Users\Admin\AppData\Local\Temp\InstallerV31751.exe','C:\Users\Admin\AppData\Local','C:\Users\Admin\AppData\Roaming','C:\Users\Admin\AppData\Local','C:\Users\Admin\AppData\Roaming','RuntimeBroker.exe','AppLaunch.exe','dwm.exe','svchost.exe','explorer.exe','services.exe','schtasks.exe','conhost.exe'); Add-MpPreference -ExclusionProcess @('C:\Users\Admin\AppData\Local\Temp\InstallerV31751.exe','RuntimeBroker.exe','InstallUtil.exe','AppLaunch.exe','dwm.exe','svchost.exe','explorer.exe','services.exe','schtasks.exe','conhost.exe','wscript.exe','concheck.exe','pathmsil.exe','ioextender.exe','NotesUpdaterPath.exe')"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:852
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -WindowStyle Hidden Start-Process 'C:\Users\Admin\AppData\Local\Temp\\NotesUpdaterPath.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4516
- - C:\Users\Admin\AppData\Local\Temp\NotesUpdaterPath.exe
    "C:\Users\Admin\AppData\Local\Temp\NotesUpdaterPath.exe"
    3⤵
    - Enumerates VirtualBox registry keys
    - Looks for VirtualBox Guest Additions in registry
    - Looks for VMWare Tools registry key
    - Creates a file in the Startup directory
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2724
  - - C:\Users\Admin\AppData\Roaming\SearchServices\NC560059\services.exe
      "C:\Users\Admin\AppData\Roaming\SearchServices\NC560059\services.exe"
      4⤵
      Enumerates VirtualBox registry keys
      Looks for VirtualBox Guest Additions in registry
      Looks for VMWare Tools registry key
      Executes dropped EXE
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4504
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\d3fs8rjp.bat""
      4⤵
      Executes a command shell one-liner
      Suspicious use of WriteProcessMemory
      PID:968
    - - C:\Windows\system32\timeout.exe
        
        timeout /t 3 /nobreak
        5⤵
        Delays execution with timeout.exe
        
        PID:5732

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 3KB
SHA256 c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485
MD5 3eb3833f769dd890afc295b977eab4b4
SHA1 e857649b037939602c72ad003e5d3698695f436f
SHA512 c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72
TLSH
T13A51EE313375B0D4C95A7F07193819C063BF8386E698AF58B65C521ED92751B9B222F3
MD5 SHA1 SHA512 TLSH

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 9cf4829370c56d503fd17a38057ff840800de539770c7af6c445f3a59aa7da3a
MD5 cbaa18e6c548e450ef57accfc90413fa
SHA1 125bff35a947b27dc1402a87d16b7b7a0a2246b4
SHA512 0c7100d9b9f2265b627bcd42bb797511b76d0eae997c1294d3a17b7d375ad860a57890cb3bfc235f04ea5ded0d41c6c5d90b5c606db6ac37de0526540d972954
TLSH
T1B3217423B3DDC850CC99023A609C9C9076B6D7C780DEDF9B2EC4C211A07FA99CB101A0
MD5 SHA1 SHA512 TLSH

Submit Download

NotesUpdaterPath.exe

Path C:\Users\Admin\AppData\Local\Temp\NotesUpdaterPath.exe
Size 543KB
SHA256 886103db80a9d38dca6ed47d3a3b41be826d213ee753b370db06db79219839c6
MD5 1fada26103545bdae8f5896b1b4d33a8
SHA1 8b1e4abb1932036fe79801f1c9e5b1e44a956ba2
SHA512 1d7d3965c084ab8e41382ff10e9c5d13af45e20f48a568d047e7606e33bfdb564b09a7216294b66728988adca1d996c6f79421a7e4d261f76caf54bc3be5ce80
SSDEEP 12288:boABsF+OJoaTyyvx+sxKJW2iaS0/lIgYT:q/vvxWJW2t/lIP
TLSH
T1DDC46C1BBA5E4D61C1901733D5E7910067F8A686B6F7DB09388903EB4D033BF9D8A687
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_tzhhgygw.4vi.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tzhhgygw.4vi.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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d3fs8rjp.bat

Path C:\Users\Admin\AppData\Local\Temp\d3fs8rjp.bat
Size 216B
SHA256 41cfea13f8f54672e68565b07120d281f02d31d40cd909894b9e10f9ea7c4508
MD5 3fc2c9e71ceb80d8eadf1bd689b2e9a1
SHA1 9ea3dbd66fa8846b427da69d2dd9d2d7f90f2170
SHA512 89501d915d3a33de32de55844e2398420a5e6b42982a816451607a78a39e8085505b673faac8bddbcf97e700c400ea7e562f3991f79583bcaa3db850db315f50
TLSH
T108D0230511478BF70404303A097F50D9506EC8952E4773521355845D734701E56D77C0
MD5 SHA1 SHA512 TLSH

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install.dat

Path C:\Users\Admin\AppData\Roaming\SearchServices\NC560059\install.dat
Size 67B
SHA256 64cbf0d60840b54c8d965ab0eb061cfbe18fce3f02663e9c4e9f3b0f41ea4db2
MD5 5841c30062b8713cea3953849691a1cb
SHA1 da2a8813d6a77e3c08552568d1e5388b95c74ce3
SHA512 7552a23d4a482f29153066de27d8df7a80b18881e504c53e581b4970834a679461b35148294ad49707f89ff31d4aebb5d2cf86884246f35b13e3c7ab80e87dc9
TLSH
T110A0025011DF8EFE541340935FBF70C9447E4E51FADC3924DBAD585861D5C0CB482039
MD5 SHA1 SHA512 TLSH

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memory/852-10-0x00000269D2960000-0x00000269D2982000-memory.dmp

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memory/2724-45-0x0000016F9EF90000-0x0000016F9EFAE000-memory.dmp

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memory/2724-43-0x0000016F9EFD0000-0x0000016F9F046000-memory.dmp

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memory/2724-40-0x0000016F84300000-0x0000016F84354000-memory.dmp

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memory/2724-37-0x0000016F83E10000-0x0000016F83E9C000-memory.dmp

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memory/4924-8-0x0000000000400000-0x0000000001A28000-memory.dmp

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memory/4924-5-0x00007FFDF8450000-0x00007FFDF850D000-memory.dmp

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memory/4924-24-0x000000001EA30000-0x000000001F426000-memory.dmp

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memory/4924-21-0x00007FFDF846B000-0x00007FFDF846C000-memory.dmp

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memory/4924-20-0x0000000000400000-0x0000000001A28000-memory.dmp

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memory/4924-9-0x0000000000400000-0x0000000001A28000-memory.dmp

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memory/4924-0-0x0000000000400000-0x0000000001A28000-memory.dmp

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memory/4924-22-0x00007FFDF8450000-0x00007FFDF850D000-memory.dmp

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memory/4924-3-0x00007FFDF8450000-0x00007FFDF850D000-memory.dmp

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memory/4924-4-0x00007FFDF8450000-0x00007FFDF850D000-memory.dmp

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memory/4924-2-0x00007FFDF8450000-0x00007FFDF850D000-memory.dmp

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memory/4924-1-0x00007FFDF846B000-0x00007FFDF846C000-memory.dmp

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memory/4924-56-0x00007FFDF8450000-0x00007FFDF850D000-memory.dmp

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memory/4924-57-0x0000000000400000-0x0000000001A28000-memory.dmp

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