d4480e06541b0ddd4012faa8c63622c8cd014ba5679f0d63a7d2951be7fc3b40

Analysis

user interaction
yes
max time kernel
149s
max time network
136s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
submitted
09/07/2026, 18:06

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General

Target
loader.exe
Size 18.0MB
Sample260709-wp64fsfz7s
SHA256 d4480e06541b0ddd4012faa8c63622c8cd014ba5679f0d63a7d2951be7fc3b40
MD5 b24b0d0e37e9444f660569bbc7ecf615
SHA1 41b87663792d7839be11ff80b431152a95e6b2d1
SHA512 e0290ebe1daf99d709b05656d5f18811a13e9fecfc884de6d08fdd5b4e937e90dc105c343b7137468ddfabb5de098c16743d2c4ca2ce0295a8cbe4bb5b87989e
SSDEEP 393216:eIDKl6Ffh82f3Ug9qd5MDWO4Icq+zj641v6YwC:ee3Zqd5My9lqnSwC
TLSH
T1701712C125E982FDC362C63DD24617EAE9C93C858DBB652ABFCA64013471C45C8EBD39
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

bootkit execution persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1580	loader.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2888	powershell.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	loader.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4208	loader.exe

Modifies data under HKEY_USERS 2 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Cryptography\TPM\Telemetry\TraceTimeLast = "134280940530341592"	loader.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Cryptography\TPM\Telemetry	loader.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2888	powershell.exe
2888	powershell.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 1 IoCs

pid	Process
4208	loader.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4208	loader.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeSystemtimePrivilege	4208	loader.exe
Token: SeDebugPrivilege	2888	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4208 wrote to memory of 1580	4208	loader.exe	84
PID 1580 wrote to memory of 2968	1580	loader.exe	85
PID 2968 wrote to memory of 2888	2968	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\loader.exe
"C:\Users\Admin\AppData\Local\Temp\loader.exe"
1⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4208
- C:\Users\Admin\AppData\Local\Temp\loader.exe
  "C:\Users\Admin\AppData\Local\Temp\loader.exe"
  2⤵
  - Executes dropped EXE
  - Writes to the Master Boot Record (MBR)
  - Modifies data under HKEY_USERS
  - Suspicious use of WriteProcessMemory
  PID:1580
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c powershell.exe -NoProfile -ExecutionPolicy Bypass -Command ^"^& { $encoded = 'QXBwIGluaXRpYWxpemF0aW9uIGVycm9yIDB4MTAz'; $text = [System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($encoded)); $text = $text.Replace('\n', [Environment]::NewLine); Add-Type -AssemblyName PresentationFramework; [System.Windows.MessageBox]::Show($text, 'sync.top', 'OK', 'Error', 'None', 'DefaultDesktopOnly') }^"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2968
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "& { $encoded = 'QXBwIGluaXRpYWxpemF0aW9uIGVycm9yIDB4MTAz'; $text = [System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($encoded)); $text = $text.Replace('\n', [Environment]::NewLine); Add-Type -AssemblyName PresentationFramework; [System.Windows.MessageBox]::Show($text, 'sync.top', 'OK', 'Error', 'None', 'DefaultDesktopOnly') }"
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2888

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_cvtcrcm1.kku.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cvtcrcm1.kku.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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loader.exe

Path C:\Users\Admin\AppData\Local\Temp\loader.exe
Size 18.0MB
SHA256 01b88f1f36131dc5ad7382552c31818a63b88a4d773f4647d063a6219d515b6a
MD5 b58a9c4f9c6e0bcb0e76ca6c0e185b8b
SHA1 a62873df948f01212c208649fcb2a495de1072ae
SHA512 3c539946f13ed5555cc6bd5a286aed1693c6ce93b5e88f7cf32a4998baf9e73656fbfb34386e53f06e4b0456670fc3b114ea5b9c88d727fafe43f2726ec48a82
SSDEEP 393216:eIDKl6Ffh82f3Ug9qd5MDWO4Icq+zj641v6Ywi:ee3Zqd5My9lqnSwi
TLSH
T11B1712C125E982FDC362C63DD24617EAE9C93C858DBB652ABFCA64013471C45C8EBD39
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1580-8-0x00007FF7DA860000-0x00007FF7DCA4B000-memory.dmp

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memory/1580-17-0x00007FF7DA860000-0x00007FF7DCA4B000-memory.dmp

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memory/2888-16-0x00000149ABF40000-0x00000149ABF62000-memory.dmp

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memory/4208-0-0x00007FF630C30000-0x00007FF632E1B000-memory.dmp

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memory/4208-7-0x00007FF630C30000-0x00007FF632E1B000-memory.dmp

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