juko | 8c9414478e5fb1bebcd2b549562d72ee567dd086b67c62b5d76ceb22c2d35a3f

General

Target
2026-08-09_7a442028d2d89bfcf7336a9fb26d23bf_elex_wannacry.exe
Size 50KB
Sample260809-3xfd2a1ves
SHA256 8c9414478e5fb1bebcd2b549562d72ee567dd086b67c62b5d76ceb22c2d35a3f
MD5 7a442028d2d89bfcf7336a9fb26d23bf
SHA1 176c6360e18d65ed8505c28748a34e432079dd89
SHA512 fb968a8beaa5f904ea7f076156f7a8a970a5fb0f2474c8be7d51a0ba80092ff6db3ec224fe0fcb79c42cd6ab33d8d235bbedefa1df38ad3d01d89af63976e9cd
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOQ:tLsF2Kerc64sTiX2IV0DpL8SE9nYOQ
TLSH
T1D333291A3B41E1D1C4A351B0EC5B4F74983AEDB58E676103BB85B70D1CB2A52CF7298E
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/0x0013000000016db3-4.dat	family_juko
behavioral2/files/0x000d00000001c64b-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5152	WINWORD.exe
6072	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-1-5-21-3986082593-3624157295-3514260330-1000\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
2908	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	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	2026-08-09_7a442028d2d89bfcf7336a9fb26d23bf_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

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
2908	cmd.exe
2796	PING.EXE
4840	PING.EXE
2784	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2796	PING.EXE
4840	PING.EXE
2784	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 5152	3040	2026-08-09_7a442028d2d89bfcf7336a9fb26d23bf_elex_wannacry.exe	89
PID 5152 wrote to memory of 2908	5152	WINWORD.exe	90
PID 2908 wrote to memory of 2796	2908	cmd.exe	92
PID 2908 wrote to memory of 4840	2908	cmd.exe	93
PID 2908 wrote to memory of 2784	2908	cmd.exe	94
PID 2908 wrote to memory of 6072	2908	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-09_7a442028d2d89bfcf7336a9fb26d23bf_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_7a442028d2d89bfcf7336a9fb26d23bf_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3040
- 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:5152
- - 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\00000C28" 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:2908
  - - 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:2796
  - - 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:4840
  - - 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:2784
  - - 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:6072

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

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Downloads

00000C28

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000C28
Size 50KB
SHA256 3de0261167d80b63abe3f09fced1e69494e46584813bbabd35117578dc1eae5f
MD5 6a0b391057fdb79941ddfd0b6da39d3e
SHA1 d0a07d3123759705f02397c45be6533c1de868dc
SHA512 11e3c3410f17232a28ff75d007d56751ea0e1aa1e1d8acf1eb835d972f8e2cb6dda8f156a173ef3c7b968bfcb906a69ce5a38a8eb275cb824947f503cf626644
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOb:tLsF2Kerc64sTiX2IV0DpL8SE9nYOb
TLSH
T12A33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 8c9414478e5fb1bebcd2b549562d72ee567dd086b67c62b5d76ceb22c2d35a3f
MD5 7a442028d2d89bfcf7336a9fb26d23bf
SHA1 176c6360e18d65ed8505c28748a34e432079dd89
SHA512 fb968a8beaa5f904ea7f076156f7a8a970a5fb0f2474c8be7d51a0ba80092ff6db3ec224fe0fcb79c42cd6ab33d8d235bbedefa1df38ad3d01d89af63976e9cd
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOQ:tLsF2Kerc64sTiX2IV0DpL8SE9nYOQ
TLSH
T1D333291A3B41E1D1C4A351B0EC5B4F74983AEDB58E676103BB85B70D1CB2A52CF7298E
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