juko | d06327cfd95673d3c40b8333b0ef37df21fd6a0dc3c16f3ab3f119dbdf1ac1a3

General

Target
2026-05-10_9e1a12f060c08cffa3f5d715aa4e4566_elex_wannacry.exe
Size 47KB
Sample260510-kcrmfsey5m
SHA256 d06327cfd95673d3c40b8333b0ef37df21fd6a0dc3c16f3ab3f119dbdf1ac1a3
MD5 9e1a12f060c08cffa3f5d715aa4e4566
SHA1 6449d77bc6e1744b4a16de3c0500a030848ed507
SHA512 3f4edf7eb12417e6a7e9f9e191f7574ad0183cda4f7262a9d0abfbf9bf7506c658f1e0d709625d18901835dd21cc195f7a5c38ed8714543ff0d7447cc94e523a
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJ5:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxT
TLSH
T16E235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery 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/0x000b000000021655-4.dat	family_juko
behavioral1/files/0x000300000002314e-14.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-1-5-21-643422742-1162610606-620613169-1000\Control Panel\International\Geo\Nation	2026-05-10_9e1a12f060c08cffa3f5d715aa4e4566_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-643422742-1162610606-620613169-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4132	WINWORD.exe
1900	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-1-5-21-643422742-1162610606-620613169-1000\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

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	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	2026-05-10_9e1a12f060c08cffa3f5d715aa4e4566_elex_wannacry.exe
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

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
5036	PING.EXE
4852	PING.EXE
4908	PING.EXE
876	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5036	PING.EXE
4852	PING.EXE
4908	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5008 wrote to memory of 4132	5008	2026-05-10_9e1a12f060c08cffa3f5d715aa4e4566_elex_wannacry.exe	85
PID 4132 wrote to memory of 876	4132	WINWORD.exe	86
PID 876 wrote to memory of 5036	876	cmd.exe	88
PID 876 wrote to memory of 4852	876	cmd.exe	89
PID 876 wrote to memory of 4908	876	cmd.exe	90
PID 876 wrote to memory of 1900	876	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-05-10_9e1a12f060c08cffa3f5d715aa4e4566_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-10_9e1a12f060c08cffa3f5d715aa4e4566_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5008
- 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:4132
- - 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\00004DF7" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:876
  - - 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:5036
  - - 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:4852
  - - 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:4908
  - - 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
      System Location Discovery: System Language Discovery
      PID:1900

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00004DF7

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004DF7
Size 47KB
SHA256 19d57ad45c3ebe326167d018f4534c540397a29032b1a2bde00993e9ead84a3b
MD5 669698a1e7ab5fd2e298d81a70720903
SHA1 e921320bdb651bb47e0fbcf54c73f3978390b593
SHA512 3a4c3699037dfed0f0de8898fb997de45474a7349b859220701dba0c7186cbc5c5301f803ee79277bf4272aa34c928f7105400e8b95b09e81c0800601c5724e4
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJV:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxf
TLSH
T1B7235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 47KB
SHA256 d06327cfd95673d3c40b8333b0ef37df21fd6a0dc3c16f3ab3f119dbdf1ac1a3
MD5 9e1a12f060c08cffa3f5d715aa4e4566
SHA1 6449d77bc6e1744b4a16de3c0500a030848ed507
SHA512 3f4edf7eb12417e6a7e9f9e191f7574ad0183cda4f7262a9d0abfbf9bf7506c658f1e0d709625d18901835dd21cc195f7a5c38ed8714543ff0d7447cc94e523a
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJ5:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxT
TLSH
T16E235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1900-16-0x0000000000930000-0x00000000009EF000-memory.dmp

Download

memory/1900-21-0x0000000000930000-0x00000000009EF000-memory.dmp

Download

memory/4132-13-0x0000000000880000-0x000000000093F000-memory.dmp

Download

memory/5008-11-0x00000000007C0000-0x000000000087F000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads