juko | aacadb35d6b3263776591270a054ccfc65dc8ff1755bc7bcb823798b7fe31480

General

Target
2026-07-18_4d30b492920f2a9ea2fb02a02f78fc27_elex_wannacry.exe
Size 47KB
Sample260718-p1bncsby6p
SHA256 aacadb35d6b3263776591270a054ccfc65dc8ff1755bc7bcb823798b7fe31480
MD5 4d30b492920f2a9ea2fb02a02f78fc27
SHA1 b0ced9e91f7037c652bf10e52dd8ede36f002951
SHA512 d12951e862510452c9e75cb0530c1172633b43945b29fbc8daf696d2f49a0f5842f488d7c86b07da69030a67be75bb768a14ef71af3d641f3cc5f3d7f065adb8
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJK:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxY
TLSH
T150235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
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/0x000d000000019cc9-4.dat	family_juko
behavioral2/files/0x000d00000001c620-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5620	WINWORD.exe
3832	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-1-5-21-1738198120-2966725515-3980530802-1000\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
5864	cmd.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	2026-07-18_4d30b492920f2a9ea2fb02a02f78fc27_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
5864	cmd.exe
4840	PING.EXE
3260	PING.EXE
3356	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3260	PING.EXE
3356	PING.EXE
4840	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4452 wrote to memory of 5620	4452	2026-07-18_4d30b492920f2a9ea2fb02a02f78fc27_elex_wannacry.exe	88
PID 5620 wrote to memory of 5864	5620	WINWORD.exe	89
PID 5864 wrote to memory of 4840	5864	cmd.exe	91
PID 5864 wrote to memory of 3260	5864	cmd.exe	92
PID 5864 wrote to memory of 3356	5864	cmd.exe	93
PID 5864 wrote to memory of 3832	5864	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-18_4d30b492920f2a9ea2fb02a02f78fc27_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-18_4d30b492920f2a9ea2fb02a02f78fc27_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4452
- 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:5620
- - 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\00000EBF" 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:5864
  - - 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:4840
  - - 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:3260
  - - 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:3356
  - - 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:3832

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

00000EBF

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000EBF
Size 47KB
SHA256 20a922f8201698510ad35563cfc3ad5f7c3a1ecf480f9649af34d254338056b9
MD5 24fc3460badb5acb343c0fcc7bdb3ca0
SHA1 e2970c7a8e3399c7e141e932979969010e43a849
SHA512 25b042217cb1d32dde5371c76f9a6f26a6c5f1948a6a26d8cca600493b8aa8a0ae94faf0ce8c85d32720b80c9ac90d480b714dfe29293d0adc44f0c8d1ada3d7
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJ8:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxy
TLSH
T1A3235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 47KB
SHA256 aacadb35d6b3263776591270a054ccfc65dc8ff1755bc7bcb823798b7fe31480
MD5 4d30b492920f2a9ea2fb02a02f78fc27
SHA1 b0ced9e91f7037c652bf10e52dd8ede36f002951
SHA512 d12951e862510452c9e75cb0530c1172633b43945b29fbc8daf696d2f49a0f5842f488d7c86b07da69030a67be75bb768a14ef71af3d641f3cc5f3d7f065adb8
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJK:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxY
TLSH
T150235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
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