juko | 0d1616fb32d38b0a73c6fd0bb816ea829d43e8609bddc00c71614793cafab5cf

General

Target
2026-08-02_e29064b574692edf4ca76b64c3cd7e22_elex_wannacry.exe
Size 50KB
Sample260802-jpt3nsxfpc
SHA256 0d1616fb32d38b0a73c6fd0bb816ea829d43e8609bddc00c71614793cafab5cf
MD5 e29064b574692edf4ca76b64c3cd7e22
SHA1 57662b0fc03f03f8f09c5cc147dc5e77422a7c00
SHA512 63f8f7bf91dc7686cfc67237460caf8bbdd7194b2c5062abbea54059097bc31296a7a1ddb7b46be281a4a63b1e892aa3de40e4c030e134698cc469a252b88492
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqzyNPWQHF8Sdq96AaWILOk:tLsF2Kerc64sTiX2IV0Dz5K8SE9nYOk
TLSH
T1ED33281A3B45E1D1C49361B0EC574F74983AECB58E276103BB85B70D2CB2A52CF7298E
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/0x000a00000001138e-4.dat	family_juko
behavioral2/files/0x000f00000001c478-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4604	WINWORD.exe
5368	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-1-5-21-1079202589-886135813-2527035092-1000\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
3164	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	2026-08-02_e29064b574692edf4ca76b64c3cd7e22_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
3164	cmd.exe
5696	PING.EXE
2108	PING.EXE
1156	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5696	PING.EXE
2108	PING.EXE
1156	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1268 wrote to memory of 4604	1268	2026-08-02_e29064b574692edf4ca76b64c3cd7e22_elex_wannacry.exe	90
PID 4604 wrote to memory of 3164	4604	WINWORD.exe	91
PID 3164 wrote to memory of 5696	3164	cmd.exe	93
PID 3164 wrote to memory of 2108	3164	cmd.exe	94
PID 3164 wrote to memory of 1156	3164	cmd.exe	95
PID 3164 wrote to memory of 5368	3164	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-08-02_e29064b574692edf4ca76b64c3cd7e22_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_e29064b574692edf4ca76b64c3cd7e22_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1268
- 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:4604
- - 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\000034F8" 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:3164
  - - 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:5696
  - - 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:2108
  - - 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:1156
  - - 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:5368

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

000034F8

Path C:\Users\Admin\AppData\Roaming\Mozilla\000034F8
Size 50KB
SHA256 148ac7bfeb38b88fde5d1cc6434d30bdf6fcc35dbd601d7d350c53abcfe2f880
MD5 92c5ade7fe4ec816038d4e89eb60dffa
SHA1 0b98195da399bc4bb4e4232bb3e988878871366e
SHA512 3f4f67213ba7d5907f459612df5c24eb7c90d2811dfd7419e36c4e5a4bb0fe9a29bbbafda6140b06959c1954ddd67a3d8635eac0f3ee55d8f0d9859c7c39af34
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqzyNPWQHF8Sdq96AaWILOx:tLsF2Kerc64sTiX2IV0Dz5K8SE9nYOx
TLSH
T15233281A3B45E1D1C49361B0EC574F74983AECB58E276103BB85B70D2CB2A52CF7298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 0d1616fb32d38b0a73c6fd0bb816ea829d43e8609bddc00c71614793cafab5cf
MD5 e29064b574692edf4ca76b64c3cd7e22
SHA1 57662b0fc03f03f8f09c5cc147dc5e77422a7c00
SHA512 63f8f7bf91dc7686cfc67237460caf8bbdd7194b2c5062abbea54059097bc31296a7a1ddb7b46be281a4a63b1e892aa3de40e4c030e134698cc469a252b88492
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqzyNPWQHF8Sdq96AaWILOk:tLsF2Kerc64sTiX2IV0Dz5K8SE9nYOk
TLSH
T1ED33281A3B45E1D1C49361B0EC574F74983AECB58E276103BB85B70D2CB2A52CF7298E
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