1e402c40711064808ba28f7523102673e1cc372af132afc62c17caf46d2b4e8a

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
31/08/2026, 16:10

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General

Target
1e402c40711064808ba28f7523102673e1cc372af132afc62c17caf46d2b4e8a.exe
Size 6.8MB
Sample260831-tmtn8sysf1
SHA256 1e402c40711064808ba28f7523102673e1cc372af132afc62c17caf46d2b4e8a
MD5 6b63c6edbb3c025cb16496fcdaa1feed
SHA1 40d7314b526a37c953dc30671ec4723f6570bea1
SHA512 77367f6d640a5c5951cf259612e7dda9ff84553e666b05f8ca56b69b889d5d2407a83bdd1edb4f0781ae62499a63ef369e692f8e4b50e06c89ea3677776553c0
SSDEEP 196608:Ai+tn+N0KANEdKJ9NKJ9iNEdKANEdKJdJ9LJ9ZD+tn+N0KANEdKJ9NKJ9iNEd8:Ai+1+N0K+EdKJ9NKJ9MEdK+EdKJdJ9L2
TLSH
T10C762316A1F04435D0982A7DDE2FFAF12D54BD117922CA6B2B981C5F7F78380AC5E326
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

discovery execution persistence

Malware Config

Signatures

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.

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\nla.sys\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\nla.sys"	usrzvc.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	usrzvc.exe

Executes dropped EXE 1 IoCs

pid	Process
2308	usrzvc.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
3748	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	1e402c40711064808ba28f7523102673e1cc372af132afc62c17caf46d2b4e8a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	usrzvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
2308	usrzvc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2308	usrzvc.exe
Token: SeLoadDriverPrivilege	2308	usrzvc.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2308	usrzvc.exe
2308	usrzvc.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2308	usrzvc.exe
2308	usrzvc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2308	usrzvc.exe
2308	usrzvc.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4388 wrote to memory of 2308	4388	1e402c40711064808ba28f7523102673e1cc372af132afc62c17caf46d2b4e8a.exe	87
PID 2308 wrote to memory of 3748	2308	usrzvc.exe	94

C:\Users\Admin\AppData\Local\Temp\1e402c40711064808ba28f7523102673e1cc372af132afc62c17caf46d2b4e8a.exe
"C:\Users\Admin\AppData\Local\Temp\1e402c40711064808ba28f7523102673e1cc372af132afc62c17caf46d2b4e8a.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4388
- C:\Users\Admin\AppData\Local\Temp\usrzvc.exe
  C:\Users\Admin\AppData\Local\Temp\usrzvc.exe -run
  2⤵
  - Sets service image path in registry
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2308
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\usrzvc.bat" "
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    PID:3748

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

usrzvc.bat

Path C:\Users\Admin\AppData\Local\Temp\usrzvc.bat
Size 139B
SHA256 33cad605784477b5de2d6400bcdbe7253582a618b4f029c69463262e44419ec5
MD5 3f11eff565c478c70854050cd6aceecc
SHA1 ef143092c94f47693f020c99d7ea479633dd561b
SHA512 5228618af1356a7179b1781926dcf467829b97cfd6fc20469981217a329123b8485080db1a2aeaa27e12c689486c60c8324bc07694e27c07f5951a44d02c71a3
TLSH
T194C02B4141C3875B480020670E7A208CD0F94CDA3F456B442621A0CC11C201CF1C73A1
MD5 SHA1 SHA512 TLSH

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usrzvc.exe

Path C:\Users\Admin\AppData\Local\Temp\usrzvc.exe
Size 7.6MB
SHA256 16e383f1e52a4fccbb28169977eeaff11042de23cde41d79fd8a590d28ad4aa6
MD5 bd8ae5ca0036bdd6dffe523a68256f09
SHA1 9fec5eea35fca046cfac41684e065f2a819043ca
SHA512 dba1f0fb1cd912cf60de0acb806ad2b1b5699d9eafcebbd143ad66a75e586a8e6846cbf31e50ba8d70d698497db8aab2278cd483c9106aea2b4ef3ede77cc1a3
SSDEEP 196608:Ai+tn+N0KANEdKJ9NKJ9iNEdKANEdKJdJ9LJ9ZD+tn+N0KANEdKJ9NKJ9iNEd/Kk:Ai+1+N0K+EdKJ9NKJ9MEdK+EdKJdJ9LP
TLSH
T1D2862316A1F04436D098297DEE2FFAF12D64BD117926CA672B581C5F7F78380AC4E326
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2308-9-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2308-11-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2308-12-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2308-17-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2308-18-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2308-19-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/4388-0-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/4388-1-0x0000000002060000-0x0000000002061000-memory.dmp

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memory/4388-2-0x0000000000472000-0x0000000000473000-memory.dmp

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memory/4388-8-0x0000000000400000-0x00000000004F4000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads