juko | 32be4cc6c590c938c408f457719ca7ad4fa09783d9f5d22cf1c345c68f591ad2

General

Target
2026-05-27_38ac0a9fca768627243874107b3fe1de_elex_wannacry.exe
Size 53KB
Sample260527-e3lagahv71
SHA256 32be4cc6c590c938c408f457719ca7ad4fa09783d9f5d22cf1c345c68f591ad2
MD5 38ac0a9fca768627243874107b3fe1de
SHA1 d0b389f0dba90fe55c81386db969b76eea458a1d
SHA512 3ea04ad3e39e576bdf192c7433d7e1aa78a8f9fceef2326e4448163c854ea09cc0ae50ff21f5fec7721ba9c669e4be221cd2715684561d1e36df300e8a026919
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2g:3Ly2Kerc64CiGIm1tcBMUOOFg
TLSH
T19A335B176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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/0x0016000000028df4-4.dat	family_juko
behavioral2/files/0x001b00000002b5ae-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5004	WINWORD.exe
4296	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-1-5-21-226940941-599731907-2645636698-1000\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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-27_38ac0a9fca768627243874107b3fe1de_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
5080	PING.EXE
6104	PING.EXE
4964	PING.EXE
1120	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5080	PING.EXE
6104	PING.EXE
4964	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 5004	4988	2026-05-27_38ac0a9fca768627243874107b3fe1de_elex_wannacry.exe	79
PID 5004 wrote to memory of 1120	5004	WINWORD.exe	80
PID 1120 wrote to memory of 5080	1120	cmd.exe	82
PID 1120 wrote to memory of 6104	1120	cmd.exe	83
PID 1120 wrote to memory of 4964	1120	cmd.exe	84
PID 1120 wrote to memory of 4296	1120	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-27_38ac0a9fca768627243874107b3fe1de_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-27_38ac0a9fca768627243874107b3fe1de_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4988
- 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:5004
- - 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\00005F51" 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:1120
  - - 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:5080
  - - 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:6104
  - - 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:4964
  - - 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:4296

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

Replay Monitor

Loading Replay Monitor...

Downloads

00005F51

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005F51
Size 53KB
SHA256 dd396daa57f12dc55c9bf48fd41e477595d8decce43e1e688d7912ebf5a8822e
MD5 e78cb747f60c2aee5c5dfe29c9f6a6ad
SHA1 800a703e4e7af4c24a9f0e85b36bedcdcb578ca8
SHA512 c94a4c7a7927ac6ea7e0066fb932afb066dd664d95e32f0ec56f3550eda70507b76ebb9766252484e2baaea3afbd4af283725c5285a203c21433a11804ac74fa
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2N:3Ly2Kerc64CiGIm1tcBMUOOFN
TLSH
T139335B176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 53KB
SHA256 32be4cc6c590c938c408f457719ca7ad4fa09783d9f5d22cf1c345c68f591ad2
MD5 38ac0a9fca768627243874107b3fe1de
SHA1 d0b389f0dba90fe55c81386db969b76eea458a1d
SHA512 3ea04ad3e39e576bdf192c7433d7e1aa78a8f9fceef2326e4448163c854ea09cc0ae50ff21f5fec7721ba9c669e4be221cd2715684561d1e36df300e8a026919
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2g:3Ly2Kerc64CiGIm1tcBMUOOFg
TLSH
T19A335B176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads