donutloader | 93dd8b7b393289f88493596faa4ae70054d9eb4fe47f2dd334f0c6bb5262f2a8

Analysis

max time kernel
150s
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
10/09/2026, 09:27

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General

Target
Tax_Notice_23665.exe
Size 118KB
Sample260910-leqcva1dmf
SHA256 93dd8b7b393289f88493596faa4ae70054d9eb4fe47f2dd334f0c6bb5262f2a8
MD5 1605971fa40b7f784311cecea47a251e
SHA1 9fd5870678ae20ffe9cc8c26068e75935f27957d
SHA512 39b5009020a2330d46a746ded44081c8ce0b08a608520ccdc3745f4b98020a537afd2872fed848c1d12321f3e90312297e436693db5017801726a14e115078de
SSDEEP 3072:dfYomTuROFcA8eTRuznTVTX3xOcODofsdp9:dgouuTQTR4nl3yAsdj
TLSH
T126C36C5B63E530E9E1B78678C4914A59E776BC7107609FEF03A0425A2F272D18D3EF21
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution donutloader packclient loader persistence

Malware Config

Extracted

Family

packclient

154.36.188.201:443

Signatures

Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
loader donutloader
Family: PackClient
PackClient is a Windows loader written in C.
loader packclient

Detects DonutLoader 1 IoCs

loader

resource	yara_rule
behavioral2/memory/3404-0-0x0000000000560000-0x00000000005C6000-memory.dmp	family_donutloader

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1014449518-1831897916-4205727055-1000\Software\Microsoft\Windows\CurrentVersion\Run\NvSvc = "C:\\ProgramData\\NVIDIA Corporation\\NvSvc\\Tax_Notice_23665.exe"	Tax_Notice_23665.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1014449518-1831897916-4205727055-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\NvSvc = "C:\\ProgramData\\NVIDIA Corporation\\NvSvc\\Tax_Notice_23665.exe"	Tax_Notice_23665.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1014449518-1831897916-4205727055-1000\Software\Microsoft\Windows\CurrentVersion\Run\NvSvc = "C:\\ProgramData\\NVIDIA Corporation\\NvSvc\\Tax_Notice_23665.exe"	Tax_Notice_23665.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1014449518-1831897916-4205727055-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\NvSvc = "C:\\ProgramData\\NVIDIA Corporation\\NvSvc\\Tax_Notice_23665.exe"	Tax_Notice_23665.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1724 set thread context of 3404	1724	Tax_Notice_23665.exe	90
PID 4108 set thread context of 7048	4108	Tax_Notice_23665.exe	95

Executes dropped EXE 1 IoCs

pid	Process
4108	Tax_Notice_23665.exe

Loads dropped DLL 1 IoCs

pid	Process
4108	Tax_Notice_23665.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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
6252	schtasks.exe
7148	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1724	Tax_Notice_23665.exe
1724	Tax_Notice_23665.exe
4108	Tax_Notice_23665.exe
4108	Tax_Notice_23665.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 3404	1724	Tax_Notice_23665.exe	90
PID 1724 wrote to memory of 6252	1724	Tax_Notice_23665.exe	91
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95
PID 4108 wrote to memory of 7048	4108	Tax_Notice_23665.exe	95

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Tax_Notice_23665.exe
"C:\Users\Admin\AppData\Local\Temp\Tax_Notice_23665.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\SysWOW64\svchost.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3404
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /Create /TN NvSvc /TR "\"C:\ProgramData\NVIDIA Corporation\NvSvc\Tax_Notice_23665.exe\"" /SC ONLOGON /RL HIGHEST /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:6252

C:\ProgramData\NVIDIA Corporation\NvSvc\Tax_Notice_23665.exe
"C:\ProgramData\NVIDIA Corporation\NvSvc\Tax_Notice_23665.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4108
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\SysWOW64\svchost.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:7048
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /Create /TN NvSvc /TR "\"C:\ProgramData\NVIDIA Corporation\NvSvc\Tax_Notice_23665.exe\"" /SC ONLOGON /RL HIGHEST /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:7148

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:3760

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Tax_Notice_23665.exe

Path C:\ProgramData\NVIDIA Corporation\NvSvc\Tax_Notice_23665.exe
Size 118KB
SHA256 93dd8b7b393289f88493596faa4ae70054d9eb4fe47f2dd334f0c6bb5262f2a8
MD5 1605971fa40b7f784311cecea47a251e
SHA1 9fd5870678ae20ffe9cc8c26068e75935f27957d
SHA512 39b5009020a2330d46a746ded44081c8ce0b08a608520ccdc3745f4b98020a537afd2872fed848c1d12321f3e90312297e436693db5017801726a14e115078de
SSDEEP 3072:dfYomTuROFcA8eTRuznTVTX3xOcODofsdp9:dgouuTQTR4nl3yAsdj
TLSH
T126C36C5B63E530E9E1B78678C4914A59E776BC7107609FEF03A0425A2F272D18D3EF21
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nvdaHelperRemote.dll

Path C:\ProgramData\NVIDIA Corporation\NvSvc\nvdaHelperRemote.dll
Size 444KB
SHA256 7295090c2cb63ebc43f932451971c41f9d015d2741e97ae3d9855f5ae87cff94
MD5 1f23d7cc6d6354c0e7b24eaa0652d96d
SHA1 7ecde045e2d31a63312d7cd9c482e0d4aa74c7fc
SHA512 6b9d778105e37d59f965ddd62f7c168534aad6c3055f5ae432fde12026cd9cb1464dba0abecf8fe6bc3d18fa5c37e0f5f871d39192802266e2cb7fde00a51131
SSDEEP 6144:mrD9MHURHn18ScLDmy7OG1rQi5zeM4/hzcoAsYd9WAnnnOD9LJo:mNMAH1W3lF4/h4oAFd9W9LJo
TLSH
T137A4AE58EBD177F3E23220B872D8CA8A07C4DED7D1D491B3ADA62C1D4AD591208F2977
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3404-10-0x0000000003660000-0x00000000036A8000-memory.dmp

Download

memory/3404-0-0x0000000000560000-0x00000000005C6000-memory.dmp

Download

memory/3404-9-0x0000000003660000-0x00000000036A8000-memory.dmp

Download

memory/3404-8-0x0000000003660000-0x00000000036A8000-memory.dmp

Download

memory/3404-2-0x0000000003660000-0x00000000036A8000-memory.dmp

Download

memory/3404-1-0x0000000003490000-0x00000000034F4000-memory.dmp

Download

memory/7048-14-0x00000000037A0000-0x0000000003804000-memory.dmp

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memory/7048-23-0x00000000038A0000-0x00000000038E8000-memory.dmp

Download

memory/7048-24-0x00000000038A0000-0x00000000038E8000-memory.dmp

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memory/7048-22-0x00000000038A0000-0x00000000038E8000-memory.dmp

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memory/7048-21-0x00000000038A0000-0x00000000038E8000-memory.dmp

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memory/7048-15-0x00000000038A0000-0x00000000038E8000-memory.dmp

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