juko | 67df9087a81df101ba3ca9cc5a187d6cf25caed397a98fbc15c58f4549ad4229

General

Target
2026-10-17_60d6fa648a6c33062055a685e96401b1_elex_wannacry.exe
Size 32KB
Sample261019-eed69aes2y
SHA256 67df9087a81df101ba3ca9cc5a187d6cf25caed397a98fbc15c58f4549ad4229
MD5 60d6fa648a6c33062055a685e96401b1
SHA1 ed09809af9f71a6c7b2aacf6e4f10d9b2c68e814
SHA512 7441033bbbf068664f35797aab912249bda2346a5235a436e0621ca4b45e2e497c0afe624fe3e2b2757e223e551e9a20cb8d4e98d1c59578cb87b7fea17fbce2
SSDEEP 768:/ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqnOdNPWQH/L:xLsF2Kerc64sTiX2IV0DxYL
TLSH
T110E23B2B6AA17052C59320F0F9591F34C43D9DB9016BB462F7417A692CB2E63CF71ACE
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
behavioral1/files/0x000c0000000242ad-3.dat	family_juko
behavioral1/files/0x00090000000243a9-12.dat	family_juko

Checks computer location settings 2 TTPs 2 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-1-5-21-240542094-4193773837-3211495583-1000\Control Panel\International\Geo\Nation	2026-10-17_60d6fa648a6c33062055a685e96401b1_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
960	WINWORD.exe
2344	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-1-5-21-240542094-4193773837-3211495583-1000\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
2756	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	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	2026-10-17_60d6fa648a6c33062055a685e96401b1_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.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
4576	PING.EXE
2756	cmd.exe
2772	PING.EXE
2596	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2772	PING.EXE
2596	PING.EXE
4576	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3880 wrote to memory of 960	3880	2026-10-17_60d6fa648a6c33062055a685e96401b1_elex_wannacry.exe	85
PID 960 wrote to memory of 2756	960	WINWORD.exe	86
PID 2756 wrote to memory of 2772	2756	cmd.exe	88
PID 2756 wrote to memory of 2596	2756	cmd.exe	89
PID 2756 wrote to memory of 4576	2756	cmd.exe	92
PID 2756 wrote to memory of 2344	2756	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-17_60d6fa648a6c33062055a685e96401b1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-17_60d6fa648a6c33062055a685e96401b1_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3880
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:960
- - 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\00005285" 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:2756
  - - 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:2772
  - - 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:2596
  - - 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:4576
  - - 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:2344

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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

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Downloads

00005285

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005285
Size 32KB
SHA256 183436608b486767625917b1f6a1b1205a543f9198562421b3f7be97d4a592d5
MD5 135a63f1be68f986b24594b64aa4ed8c
SHA1 e3617560298a3bf1a022e35cde1ad38639427ee4
SHA512 f29f134f4b399b0e6a67a46eede4b7d2623af394405b620d7e38aeac9d22c92745a2e547903f16266d7b40f52dc1ee0a6ad9c5a8757553d98353e04612643b26
SSDEEP 768:/ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqnOdNPWQH/s:xLsF2Kerc64sTiX2IV0DxYs
TLSH
T127E23B2B6AA17052C59320F0F9591F34C43D9DB9016BB462F7417A692CB2E63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 67df9087a81df101ba3ca9cc5a187d6cf25caed397a98fbc15c58f4549ad4229
MD5 60d6fa648a6c33062055a685e96401b1
SHA1 ed09809af9f71a6c7b2aacf6e4f10d9b2c68e814
SHA512 7441033bbbf068664f35797aab912249bda2346a5235a436e0621ca4b45e2e497c0afe624fe3e2b2757e223e551e9a20cb8d4e98d1c59578cb87b7fea17fbce2
SSDEEP 768:/ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqnOdNPWQH/L:xLsF2Kerc64sTiX2IV0DxYL
TLSH
T110E23B2B6AA17052C59320F0F9591F34C43D9DB9016BB462F7417A692CB2E63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads