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
behavioral2/files/0x000a00000000d3db-5.dat	family_juko
behavioral2/files/0x001f00000002b358-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3732	WINWORD.exe
1952	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-1-5-21-3119821332-640943685-2562343641-1000\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	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

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
2984	PING.EXE
4688	PING.EXE
1864	PING.EXE
2464	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2984	PING.EXE
4688	PING.EXE
1864	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3584 wrote to memory of 3732	3584	2026-05-10_9e1a12f060c08cffa3f5d715aa4e4566_elex_wannacry.exe	79
PID 3732 wrote to memory of 2464	3732	WINWORD.exe	80
PID 2464 wrote to memory of 2984	2464	cmd.exe	82
PID 2464 wrote to memory of 4688	2464	cmd.exe	83
PID 2464 wrote to memory of 1864	2464	cmd.exe	84
PID 2464 wrote to memory of 1952	2464	cmd.exe	85

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⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3584
- 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:3732
- - 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\0000614E" 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:2464
  - - 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:2984
  - - 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:4688
  - - 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:1864
  - - 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:1952

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

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

0000614E

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000614E
Size 47KB
SHA256 69a108905bd46d220142b78c525839622b37e9027e48418ed37bc893c56f4110
MD5 cb2b191c152ba8e54729c0f7710f05df
SHA1 71b66c07d2e45e7327e7d253e20556a9fabd8c8a
SHA512 05569a8c304888e7b4d9dcb99e2bf6569707b9a255f8816b7d057b898cfa372dbf04ebd1d7c20020b3a7d9d9f2711a90a0bf8baf52984ef59543ebafa4388603
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJT:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxR
TLSH
T1C3235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads