b2adace2d5b56e1ce62875558cfac2d1ba79c8d4d28625a8e7a0b475fa7615bd

Analysis

max time kernel
149s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
25/08/2026, 13:30

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General

Target
ZynvexClient-Built.exe
Size 12KB
Sample260825-qrybfahd23
SHA256 b2adace2d5b56e1ce62875558cfac2d1ba79c8d4d28625a8e7a0b475fa7615bd
MD5 8cacb756f0a592ca8dd432a08bc393c9
SHA1 6dd1cd0a6473693c510c2b44fb9c4b1c9da27a60
SHA512 702581e81525ed38623c558e992081b944ca894e63e5e1d42995367122f804d5a868e25e4a7a1b49dc90596fc7fc353bee4942e2939c6f0e2efcfd38aff28249
SSDEEP 192:PlR/pu0hSdyl1heBQR2HF8Z4ogNmaHYkfzNuOdRGt569r0PrpfB3:Pr/JSw1EBQkaynLYYzN5/00Oj
TLSH
T1F342081D97EC6633EC7E0BB88CB2C34107F1E6216542DF9E7DC8A09A6D437480651BAE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

defense_evasion discovery execution persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
5176	driver.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Run\Chrome-Driver = "C:\\Users\\Admin\\AppData\\Local\\Chrome-Driver\\driver.exe"	ZynvexClient-Built.exe

Executes a command shell one-liner 1 TTPs 2 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
1412	cmd.exe
4992	cmd.exe

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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	driver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ZynvexClient-Built.exe

Kills process with taskkill 2 IoCs

defense_evasion

pid	Process
5404	taskkill.exe
3928	taskkill.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1564	ZynvexClient-Built.exe
Token: SeDebugPrivilege	1564	ZynvexClient-Built.exe
Token: SeDebugPrivilege	5176	driver.exe
Token: SeDebugPrivilege	5176	driver.exe
Token: SeDebugPrivilege	3928	taskkill.exe
Token: SeDebugPrivilege	5404	taskkill.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1564 wrote to memory of 1412	1564	ZynvexClient-Built.exe	92
PID 1412 wrote to memory of 3928	1412	cmd.exe	94
PID 5176 wrote to memory of 4992	5176	driver.exe	96
PID 4992 wrote to memory of 5404	4992	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\ZynvexClient-Built.exe
"C:\Users\Admin\AppData\Local\Temp\ZynvexClient-Built.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1564
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /c taskkill /F /IM explorer.exe
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1412
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /F /IM explorer.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3928

C:\Users\Admin\AppData\Local\Chrome-Driver\driver.exe
C:\Users\Admin\AppData\Local\Chrome-Driver\driver.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5176
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /c taskkill /F /IM explorer.exe
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4992
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /F /IM explorer.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:5404

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

driver.exe

Path C:\Users\Admin\AppData\Local\Chrome-Driver\driver.exe
Size 12KB
SHA256 b2adace2d5b56e1ce62875558cfac2d1ba79c8d4d28625a8e7a0b475fa7615bd
MD5 8cacb756f0a592ca8dd432a08bc393c9
SHA1 6dd1cd0a6473693c510c2b44fb9c4b1c9da27a60
SHA512 702581e81525ed38623c558e992081b944ca894e63e5e1d42995367122f804d5a868e25e4a7a1b49dc90596fc7fc353bee4942e2939c6f0e2efcfd38aff28249
SSDEEP 192:PlR/pu0hSdyl1heBQR2HF8Z4ogNmaHYkfzNuOdRGt569r0PrpfB3:Pr/JSw1EBQkaynLYYzN5/00Oj
TLSH
T1F342081D97EC6633EC7E0BB88CB2C34107F1E6216542DF9E7DC8A09A6D437480651BAE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1564-0-0x0000000074AD2000-0x0000000074AD3000-memory.dmp

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memory/1564-1-0x0000000000820000-0x000000000082A000-memory.dmp

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memory/1564-4-0x0000000074AC0000-0x000000007527C000-memory.dmp

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memory/1564-9-0x0000000074AD2000-0x0000000074AD3000-memory.dmp

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memory/1564-10-0x0000000074AC0000-0x000000007527C000-memory.dmp

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memory/5176-7-0x0000000074AC0000-0x000000007527C000-memory.dmp

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memory/5176-8-0x0000000074AC0000-0x000000007527C000-memory.dmp

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memory/5176-11-0x0000000074AC0000-0x000000007527C000-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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