juko | 245d8b91f3d43484c3aba6557bc888b81218a2f04b1f287b852380fccb595923

General

Target
2026-05-07_e0b8b8b2df3472acab6289440b49a413_elex_wannacry.exe
Size 30KB
Sample260507-ga3p6afv4v
SHA256 245d8b91f3d43484c3aba6557bc888b81218a2f04b1f287b852380fccb595923
MD5 e0b8b8b2df3472acab6289440b49a413
SHA1 de2cd826b329ad4eb28eb66f71e7609d2da9e961
SHA512 ff62d1c821335e9372f93831871812e5231d7b766a9351df21e90cdd145c0d3d769ea72245421aaba570d87c9d10f485bc45a872b38f23afe1d4cc92b116bb8b
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXF:tLsF2Kerc64sTiX2IV0DzloF
TLSH
T14FE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x003300000002b1cf-4.dat	family_juko
behavioral2/files/0x001c00000002b3a1-9.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3164	WINWORD.exe
4100	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-1-5-21-1383858298-2057492509-1726743289-1000\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	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	2026-05-07_e0b8b8b2df3472acab6289440b49a413_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
3816	PING.EXE
2676	PING.EXE
3688	PING.EXE
5896	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3816	PING.EXE
2676	PING.EXE
3688	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 892 wrote to memory of 3164	892	2026-05-07_e0b8b8b2df3472acab6289440b49a413_elex_wannacry.exe	80
PID 3164 wrote to memory of 5896	3164	WINWORD.exe	81
PID 5896 wrote to memory of 3816	5896	cmd.exe	83
PID 5896 wrote to memory of 2676	5896	cmd.exe	84
PID 5896 wrote to memory of 3688	5896	cmd.exe	85
PID 5896 wrote to memory of 4100	5896	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-07_e0b8b8b2df3472acab6289440b49a413_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-07_e0b8b8b2df3472acab6289440b49a413_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:892
- 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:3164
- - 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\0000614E" 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:5896
  - - 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:3816
  - - 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:2676
  - - 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:3688
  - - 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:4100

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

0000614E

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000614E
Size 30KB
SHA256 ee861090b59ed9f0edd60da62d369865e8ecffb9309151759fbaec0fae335cdc
MD5 a2823fbba600ab99cc9559e4546e9648
SHA1 43482a2d6099185a8fd3015d884f91a9961df9d4
SHA512 45e7320d9bde022a5e3207ac2e3b5a6f288fd2a078dcaac6af63f6748ec51c97f12f9ed44f8a530e4e6fe74b619c6b38bce7e2a050bf424d3eae6208a141efa4
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXe:tLsF2Kerc64sTiX2IV0Dzloe
TLSH
T1F4E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 245d8b91f3d43484c3aba6557bc888b81218a2f04b1f287b852380fccb595923
MD5 e0b8b8b2df3472acab6289440b49a413
SHA1 de2cd826b329ad4eb28eb66f71e7609d2da9e961
SHA512 ff62d1c821335e9372f93831871812e5231d7b766a9351df21e90cdd145c0d3d769ea72245421aaba570d87c9d10f485bc45a872b38f23afe1d4cc92b116bb8b
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXF:tLsF2Kerc64sTiX2IV0DzloF
TLSH
T14FE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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