juko | 7025dd3768d7149ea6ab04b99e11bfd948d2afc961651072d55f3a713c5acd46

General

Target
2026-10-14_9b4b6dbcb47a25acfab5072d1bf3d6b1_elex_wannacry.exe
Size 32KB
Sample261014-te38psvt3q
SHA256 7025dd3768d7149ea6ab04b99e11bfd948d2afc961651072d55f3a713c5acd46
MD5 9b4b6dbcb47a25acfab5072d1bf3d6b1
SHA1 e34ea40730be1e9442bd9cff29c7b4a4d89a1246
SHA512 a37c76070f9975a62dccf2b13dc50cc4fd1ac46118c547578905bbde7754cddbed398f71cf960f007076937ed23f07cdb33c32a358199cc8f1bc859076029073
SSDEEP 768:5ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHph:DLsF2Kerc64sTiX2IV0Dhuh
TLSH
T100E24A1B2AA17052C59320B0FA991F34C47D4CB6116BB066FB417B6928B2D63CFB1DDE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution juko persistence trojan

Malware Config

Signatures

Family: Juko
Juko is a trojan written in C++.
trojan juko

Detects Juko 2 IoCs

resource	yara_rule
behavioral2/files/0x000d00000001c5fb-3.dat	family_juko
behavioral2/files/0x000e00000001c5fc-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
200	WINWORD.exe
1760	WINWORD.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-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\WINWORD = "C:\\Users\\Admin\\AppData\\Roaming\\Mozilla\\WINWORD.exe -r"	WINWORD.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
5616	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-14_9b4b6dbcb47a25acfab5072d1bf3d6b1_elex_wannacry.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5616	cmd.exe
1932	PING.EXE
4340	PING.EXE
2860	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1932	PING.EXE
4340	PING.EXE
2860	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 200	2488	2026-10-14_9b4b6dbcb47a25acfab5072d1bf3d6b1_elex_wannacry.exe	88
PID 200 wrote to memory of 5616	200	WINWORD.exe	89
PID 5616 wrote to memory of 1932	5616	cmd.exe	91
PID 5616 wrote to memory of 4340	5616	cmd.exe	92
PID 5616 wrote to memory of 2860	5616	cmd.exe	93
PID 5616 wrote to memory of 1760	5616	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-10-14_9b4b6dbcb47a25acfab5072d1bf3d6b1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-14_9b4b6dbcb47a25acfab5072d1bf3d6b1_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:200
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 2&del "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe"&ping 127.0.0.1 -n 2&rename "C:\Users\Admin\AppData\Roaming\Mozilla\00004340" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:5616
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1932
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4340
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2860
  - - C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
      "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:1760

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

00004340

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004340
Size 32KB
SHA256 ceff3a6e3e3c96d180ea079ae909665c3ff491f1e00de6f63f8b2f8c85fdc1db
MD5 48c3fcc359e80c7da18f86b2b095776f
SHA1 ae1d04c6f82689140e20190a9bd644409f428bde
SHA512 bfe208faa10b2d889eced7f7b0ad29dc776d7e1484a3d3ff301848ba0c3c5bf8847e6aa24cc89df70017b66bfe2b4be6df60b0996bbc5bc397dd8e9ae8f3a66e
SSDEEP 768:5ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpV:DLsF2Kerc64sTiX2IV0DhuV
TLSH
T19EE24A1B2AA17052C59320B0FA991F34C47D4CB6116BB066FB417B6928B2D63CFB1DDE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 7025dd3768d7149ea6ab04b99e11bfd948d2afc961651072d55f3a713c5acd46
MD5 9b4b6dbcb47a25acfab5072d1bf3d6b1
SHA1 e34ea40730be1e9442bd9cff29c7b4a4d89a1246
SHA512 a37c76070f9975a62dccf2b13dc50cc4fd1ac46118c547578905bbde7754cddbed398f71cf960f007076937ed23f07cdb33c32a358199cc8f1bc859076029073
SSDEEP 768:5ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHph:DLsF2Kerc64sTiX2IV0Dhuh
TLSH
T100E24A1B2AA17052C59320B0FA991F34C47D4CB6116BB066FB417B6928B2D63CFB1DDE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads