juko | d9460aaf663e338c50d317558e6e23a8f3b61ee61c7b55e521af3c6a320a0aec

General

Target
2026-05-03_6322da417b7ace41e76e9331f719a04f_elex_wannacry.exe
Size 61KB
Sample260503-sd6f1abx5w
SHA256 d9460aaf663e338c50d317558e6e23a8f3b61ee61c7b55e521af3c6a320a0aec
MD5 6322da417b7ace41e76e9331f719a04f
SHA1 ab1acdaeb7b227688b4341088c6c30cf86c632ca
SHA512 c4acff196590e0733dfdc0dfe958f81c2b1ce6eb8473f4d84d64aba3de3fa4d2f41830af41897071dcac2bb8d141bd22da0f23e0432cbce5fefac62e29e41407
SSDEEP 1536:yLsF2Kerc64sTiX2IV0DZZbyyCwlAY0VdTQO:yLy2Kerc64CiGImVZuyp8Tl
TLSH
T13E532C26B950B072D95220B06A6D6B36417A9DF10317A1D3E7407ADC68F2FD2EF306CE
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 7 IoCs

resource	yara_rule
behavioral2/memory/2660-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x000900000002a04f-5.dat	family_juko
behavioral2/memory/2660-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/5616-14-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b4c2-15.dat	family_juko
behavioral2/memory/3108-17-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/3108-18-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5616	WINWORD.exe
3108	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-1-5-21-600123060-2148212387-2211176695-1000\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	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	2026-05-03_6322da417b7ace41e76e9331f719a04f_elex_wannacry.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
4648	PING.EXE
1728	PING.EXE
2624	cmd.exe
4644	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1728	PING.EXE
4644	PING.EXE
4648	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 5616	2660	2026-05-03_6322da417b7ace41e76e9331f719a04f_elex_wannacry.exe	79
PID 5616 wrote to memory of 2624	5616	WINWORD.exe	80
PID 2624 wrote to memory of 4644	2624	cmd.exe	82
PID 2624 wrote to memory of 4648	2624	cmd.exe	83
PID 2624 wrote to memory of 1728	2624	cmd.exe	84
PID 2624 wrote to memory of 3108	2624	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-03_6322da417b7ace41e76e9331f719a04f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-03_6322da417b7ace41e76e9331f719a04f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2660
- 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:5616
- - 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\00001866" 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:2624
  - - 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:4644
  - - 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:4648
  - - 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:1728
  - - 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:3108

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

00001866

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001866
Size 61KB
SHA256 0cc4092282b332399706c822a7ecf6d5fd7d125ecec251127be0bc5f1f4a3f51
MD5 e450f304e06efb9813d2b01cb39d788e
SHA1 3032a8783d4416eda5b921c6a9a677256c17fc03
SHA512 a2390bafc5b3233809aacaf618e7be7a3851c08e8b95f3f3900641a2cd4caa7ad97eeba7fb84290311272f865b65864d4e57cc6f6e400405557a4cf7d610fbb0
SSDEEP 1536:yLsF2Kerc64sTiX2IV0DZZbyyCwlAY0VdTQn:yLy2Kerc64CiGImVZuyp8TY
TLSH
T1FA532C26B950B072D95220B06A6D6B36417A9DF10317A1D3E7407ADC68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 61KB
SHA256 d9460aaf663e338c50d317558e6e23a8f3b61ee61c7b55e521af3c6a320a0aec
MD5 6322da417b7ace41e76e9331f719a04f
SHA1 ab1acdaeb7b227688b4341088c6c30cf86c632ca
SHA512 c4acff196590e0733dfdc0dfe958f81c2b1ce6eb8473f4d84d64aba3de3fa4d2f41830af41897071dcac2bb8d141bd22da0f23e0432cbce5fefac62e29e41407
SSDEEP 1536:yLsF2Kerc64sTiX2IV0DZZbyyCwlAY0VdTQO:yLy2Kerc64CiGImVZuyp8Tl
TLSH
T13E532C26B950B072D95220B06A6D6B36417A9DF10317A1D3E7407ADC68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2660-0-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/2660-12-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/3108-17-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/3108-18-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5616-14-0x0000000000400000-0x0000000000422000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads