f407ab16bf3e79745c11f95dd1973c7c791a3e3a63ed0404cb8c80166a58215e

Analysis

max time kernel
148s
max time network
127s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
21/08/2026, 10:20

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General

Target
2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe
Size 44KB
Sample260821-mc32laxgpb
SHA256 f407ab16bf3e79745c11f95dd1973c7c791a3e3a63ed0404cb8c80166a58215e
MD5 af649156ba3141ba1875d2ee9865f462
SHA1 821d8f4b365ed60c0bd678ccaccc194470e608a4
SHA512 03f4559f1926ac2644a30e10f1f89fca1fbf81a2061549ea1c11d17abde07ba36310cf1d1aedcc9dc451e9b0b10dcf14c03e848f345e985498a7dbca2c10b857
SSDEEP 768:ewI8gjojCaXBP2Rq3lD+HShUJ35FBZDrQlhIg3NUy8Lpqu5G:rqANXlWq3FMShU1ElhIg31ru5G
TLSH
T1BE135C02E39501F9F2A909B43CBB2B37A13E7DB416419287E770CE685CB6692F439347
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

discovery execution persistence

Malware Config

Signatures

Server Software Component: Terminal Services DLL 1 TTPs 1 IoCs

persistence

Terminal Services DLL

T1505.005

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\EventSystem\Parameters\ServiceDll = "C:\\WINDOWS\\system32\\es.dll"	2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\usnsvc.dll	2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\msnback.bat	2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe

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
5844	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	2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe

Runs net.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
812	Process not Found

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4224 wrote to memory of 3356	4224	2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe	90
PID 3356 wrote to memory of 2088	3356	net.exe	92
PID 4224 wrote to memory of 4896	4224	2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe	93
PID 4224 wrote to memory of 5844	4224	2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe	94
PID 4896 wrote to memory of 1188	4896	net.exe	97

C:\Users\Admin\AppData\Local\Temp\2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-21_af649156ba3141ba1875d2ee9865f462_elex_wannacry.exe"
1⤵
- Server Software Component: Terminal Services DLL
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4224
- C:\Windows\SysWOW64\net.exe
  net stop wmdmpmsn
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3356
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop wmdmpmsn
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2088
- C:\Windows\SysWOW64\net.exe
  net start wmdmpmsn
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4896
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 start wmdmpmsn
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1188
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\msnback.bat
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:5844

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Server Software Component

T1505

Terminal Services DLL

T1505.005

Privilege Escalation

Defense Evasion

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

msnback.bat

Path C:\Windows\msnback.bat
Size 256B
SHA256 2a12ef1be7dd04f7d2422bc54f5a83ed38671d9909d9ff99624565ac1f9697d4
MD5 3b98eac79768c20866b4115f5c478861
SHA1 50cedb286986745d90c7145acb8e34310ed3fda5
SHA512 a92772454d74951f39da1e2166d4ee6c086cf142045f00449512e0d9ffef4deabb2659ca2cfaddf63c1d54601d51a3f1947a02ade06b5826303fb1dace1489b5
TLSH
T115D02B1181F58AB25581B03B9955050FD009F874B60533225F10C0847482C4DFC8B540
MD5 SHA1 SHA512 TLSH

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