juko | d3ca582d3cac86b78477e850705c97bb8228ebf5a2ea92297c4bd339bd337eb3

General

Target
2026-05-05_9aa673508c02789b21440d447695b658_elex_wannacry.exe
Size 50KB
Sample260505-jpj8gaaz21
SHA256 d3ca582d3cac86b78477e850705c97bb8228ebf5a2ea92297c4bd339bd337eb3
MD5 9aa673508c02789b21440d447695b658
SHA1 ba96b799b1156264f3a9bbbaecb3591ba8fbb7fa
SHA512 8be638efaeea679b6edb9e266b49c654b148083157bf8a4e027bece3659cf847a61de40e26df46d67b6da9bda3972bd42a2a7ea38c87df98ac6cb5677807bd38
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqzyNPWQHF8Sdq96AaWILOB:tLsF2Kerc64sTiX2IV0Dz5K8SE9nYOB
TLSH
T1CB33281A3B45E1D1C49361B0EC574F74983AECB58E276103BB85B70D2CB2A52CF7298E
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/0x000f000000028e7a-4.dat	family_juko
behavioral2/files/0x001d00000002b3da-14.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4700	WINWORD.exe
1864	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-1-5-21-2397528088-2630719772-1129911217-1000\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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-05_9aa673508c02789b21440d447695b658_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

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
5384	PING.EXE
1340	PING.EXE
1560	PING.EXE
2412	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5384	PING.EXE
1340	PING.EXE
1560	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4708 wrote to memory of 4700	4708	2026-05-05_9aa673508c02789b21440d447695b658_elex_wannacry.exe	78
PID 4700 wrote to memory of 2412	4700	WINWORD.exe	79
PID 2412 wrote to memory of 5384	2412	cmd.exe	81
PID 2412 wrote to memory of 1340	2412	cmd.exe	82
PID 2412 wrote to memory of 1560	2412	cmd.exe	83
PID 2412 wrote to memory of 1864	2412	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-05_9aa673508c02789b21440d447695b658_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-05_9aa673508c02789b21440d447695b658_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4708
- 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:4700
- - 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\00007A9D" 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:2412
  - - 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:5384
  - - 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:1340
  - - 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:1560
  - - 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:1864

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

00007A9D

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007A9D
Size 50KB
SHA256 942f6086163b1fe58a6ad795df5ca77c204d9ffa1fe5cc860e688c956506d852
MD5 ebf743780d7d5a8d0fd079a7dc252a5e
SHA1 1a1f0ab5a20a79b23a16bd2e2fb4e89b2fb40281
SHA512 1068c3a2b1ef6675725c1eff7283653676f3b3a69a9c3f196e9579f1afee127e49b07e116e5efb0dc1dd966497787350373d43ac61694a609c9ee8e89d8a3820
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqzyNPWQHF8Sdq96AaWILOe:tLsF2Kerc64sTiX2IV0Dz5K8SE9nYOe
TLSH
T10633281A3B45E1D1C49361B0EC574F74983AECB58E276103BB85B70D2CB2A52CF7298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 d3ca582d3cac86b78477e850705c97bb8228ebf5a2ea92297c4bd339bd337eb3
MD5 9aa673508c02789b21440d447695b658
SHA1 ba96b799b1156264f3a9bbbaecb3591ba8fbb7fa
SHA512 8be638efaeea679b6edb9e266b49c654b148083157bf8a4e027bece3659cf847a61de40e26df46d67b6da9bda3972bd42a2a7ea38c87df98ac6cb5677807bd38
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqzyNPWQHF8Sdq96AaWILOB:tLsF2Kerc64sTiX2IV0Dz5K8SE9nYOB
TLSH
T1CB33281A3B45E1D1C49361B0EC574F74983AECB58E276103BB85B70D2CB2A52CF7298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1864-17-0x0000000002BA0000-0x0000000002BA7000-memory.dmp

Download

memory/1864-16-0x00000000025E0000-0x0000000002644000-memory.dmp

Download

memory/4700-13-0x0000000002220000-0x0000000002284000-memory.dmp

Download

memory/4708-10-0x00000000025E0000-0x0000000002644000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads