juko | 567034bf3f49af47dd63fbb7f1fc852b347c6b0a53f4684e31d4168fc0168dc0

General

Target
2026-08-08_60f22936ad75ef148aedcf56bbd37a29_elex_wannacry.exe
Size 49KB
Sample260808-mx7waavgmf
SHA256 567034bf3f49af47dd63fbb7f1fc852b347c6b0a53f4684e31d4168fc0168dc0
MD5 60f22936ad75ef148aedcf56bbd37a29
SHA1 7433c2be4c8f653cba700ab5b9d1bf94eafdde12
SHA512 164e1eff739fff61339159902102da60e82fbfe52ef2f10e8ce26f291bd047f387aab8173350ba46b2274c46347ee28138bfa9a3e4420861dcc57480c966f167
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2V:VLy2Kerc64CiGImVucp4kojWh2V
TLSH
T1A0334C0A3BD550C2D56205B0EDAA0F35833BEC391127A75EA750765A1C72D6BCF30E9E
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 7 IoCs

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x000a000000011374-5.dat	family_juko
behavioral2/memory/4344-10-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/4828-12-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x000f00000001c4c0-13.dat	family_juko
behavioral2/memory/5648-15-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/5648-16-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4828	WINWORD.exe
5648	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-1-5-21-2115213192-531537726-3295841909-1000\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
2368	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	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	2026-08-08_60f22936ad75ef148aedcf56bbd37a29_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
2964	PING.EXE
5900	PING.EXE
2368	cmd.exe
5588	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5588	PING.EXE
2964	PING.EXE
5900	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4344 wrote to memory of 4828	4344	2026-08-08_60f22936ad75ef148aedcf56bbd37a29_elex_wannacry.exe	89
PID 4828 wrote to memory of 2368	4828	WINWORD.exe	90
PID 2368 wrote to memory of 5588	2368	cmd.exe	92
PID 2368 wrote to memory of 2964	2368	cmd.exe	93
PID 2368 wrote to memory of 5900	2368	cmd.exe	94
PID 2368 wrote to memory of 5648	2368	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-08_60f22936ad75ef148aedcf56bbd37a29_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_60f22936ad75ef148aedcf56bbd37a29_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4344
- 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:4828
- - 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\000049CA" 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:2368
  - - 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:5588
  - - 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:2964
  - - 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:5900
  - - 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:5648

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

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Downloads

000049CA

Path C:\Users\Admin\AppData\Roaming\Mozilla\000049CA
Size 49KB
SHA256 db8d8e10bc9feedbda63e78cdc711733d3ff007855f0f9e37571cf6a206d27a7
MD5 74e23169e8bd49528c0b8e91ede9933a
SHA1 4f31cdbe2d1e1f9966bbe50c55986126f451f06e
SHA512 20ee4fdccdc299423cc3c7a9fca3accb4ec1de4ea5f3520d898901200d197bd42b86544df74cfa6a79a40ca13726d50381ff06efc8728920e29b1f4f201b68ae
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2h:VLy2Kerc64CiGImVucp4kojWh2h
TLSH
T1D0334C0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 49KB
SHA256 567034bf3f49af47dd63fbb7f1fc852b347c6b0a53f4684e31d4168fc0168dc0
MD5 60f22936ad75ef148aedcf56bbd37a29
SHA1 7433c2be4c8f653cba700ab5b9d1bf94eafdde12
SHA512 164e1eff739fff61339159902102da60e82fbfe52ef2f10e8ce26f291bd047f387aab8173350ba46b2274c46347ee28138bfa9a3e4420861dcc57480c966f167
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2V:VLy2Kerc64CiGImVucp4kojWh2V
TLSH
T1A0334C0A3BD550C2D56205B0EDAA0F35833BEC391127A75EA750765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4344-0-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/4344-10-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/4828-12-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5648-15-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5648-16-0x0000000000400000-0x0000000000420000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads