juko | c64d2b3eefacb79f037a8c356967c30966ebf2bb425361858f34fb48a2f0f383

General

Target
2026-04-25_a50ad3cc935bd895319b79bb8e98a831_elex_wannacry.exe
Size 32KB
Sample260425-c24djscy7v
SHA256 c64d2b3eefacb79f037a8c356967c30966ebf2bb425361858f34fb48a2f0f383
MD5 a50ad3cc935bd895319b79bb8e98a831
SHA1 1fc766eeb4bd8fbbf6a076a7b0c450334d553239
SHA512 3f070566cccdb94a9733c9866ed7ba688e401090e2a768d8f1698f5dd5f5bc52e13ebe23642f528cb1af2d0410c7b400a5b3b718d2faeb6dfbc69cba048befc2
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7k:ZLsF2Kerc64sTiX2IV0DKy7k
TLSH
T120E23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
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/0x001f00000002b0b0-4.dat	family_juko
behavioral2/files/0x001a00000002b384-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
644	WINWORD.exe
4872	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-1-5-21-2122505878-652277452-2375749442-1000\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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-25_a50ad3cc935bd895319b79bb8e98a831_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
4636	cmd.exe
896	PING.EXE
2468	PING.EXE
4844	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2468	PING.EXE
4844	PING.EXE
896	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3880 wrote to memory of 644	3880	2026-04-25_a50ad3cc935bd895319b79bb8e98a831_elex_wannacry.exe	80
PID 644 wrote to memory of 4636	644	WINWORD.exe	81
PID 4636 wrote to memory of 896	4636	cmd.exe	83
PID 4636 wrote to memory of 2468	4636	cmd.exe	84
PID 4636 wrote to memory of 4844	4636	cmd.exe	85
PID 4636 wrote to memory of 4872	4636	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-25_a50ad3cc935bd895319b79bb8e98a831_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-25_a50ad3cc935bd895319b79bb8e98a831_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3880
- 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:644
- - 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\00007B0D" 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:4636
  - - 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:896
  - - 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:2468
  - - 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:4844
  - - 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:4872

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

00007B0D

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007B0D
Size 32KB
SHA256 4c187dbda997cd8914e6415694062e399cd55bada3e04c81dc554de24b5065f6
MD5 3b28c7448a2eb84e1265a3d04c89b64f
SHA1 a3df56fd5ea9d9e39fc6120434133209199755a4
SHA512 d1a85935759ce58c367d5565b67d750ed0a4cd1f8cb90795cbd2b7630d5ed879d7d6bf90e71e763c212e1a920f0dcc6e9fe14770ed73b9811b91650ad60c2c90
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7J:ZLsF2Kerc64sTiX2IV0DKy7J
TLSH
T1E1E23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 c64d2b3eefacb79f037a8c356967c30966ebf2bb425361858f34fb48a2f0f383
MD5 a50ad3cc935bd895319b79bb8e98a831
SHA1 1fc766eeb4bd8fbbf6a076a7b0c450334d553239
SHA512 3f070566cccdb94a9733c9866ed7ba688e401090e2a768d8f1698f5dd5f5bc52e13ebe23642f528cb1af2d0410c7b400a5b3b718d2faeb6dfbc69cba048befc2
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7k:ZLsF2Kerc64sTiX2IV0DKy7k
TLSH
T120E23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4872-14-0x0000000002B20000-0x0000000002B84000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads