juko | 403e5b350d48999074aa1324042d49e890396bf031518cba88d72c5db1f1c0b5

Analysis

max time kernel
149s
max time network
148s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
19/04/2026, 14:30

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General

Target
2026-04-19_064464e9d28e71018280f8eeca9da844_elex_wannacry.exe
Size 105KB
Sample260419-rt82dscy3l
SHA256 403e5b350d48999074aa1324042d49e890396bf031518cba88d72c5db1f1c0b5
MD5 064464e9d28e71018280f8eeca9da844
SHA1 e5212fc7b30024742ce7b0dbca71cd691bace7fe
SHA512 a5a357dbfca355e9fe0f376b85011a9f4c134efb3d712f90df1664580fa3669a14dee85f4df2d911a387589a542bb81e565bff42671a795900704e5706712c12
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqeNPWQHEz0:OLsF2Kerc64sTiX2IV0D91z0
TLSH
T1AAB32A2B2AA57052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
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/0x002800000002b179-4.dat	family_juko
behavioral2/files/0x002000000002b300-14.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4208	WINWORD.exe
1920	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-1-5-21-3119821332-640943685-2562343641-1000\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	2026-04-19_064464e9d28e71018280f8eeca9da844_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
3920	PING.EXE
4512	PING.EXE
1312	PING.EXE
2808	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3920	PING.EXE
4512	PING.EXE
1312	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3960 wrote to memory of 4208	3960	2026-04-19_064464e9d28e71018280f8eeca9da844_elex_wannacry.exe	79
PID 4208 wrote to memory of 2808	4208	WINWORD.exe	80
PID 2808 wrote to memory of 3920	2808	cmd.exe	82
PID 2808 wrote to memory of 4512	2808	cmd.exe	83
PID 2808 wrote to memory of 1312	2808	cmd.exe	84
PID 2808 wrote to memory of 1920	2808	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-04-19_064464e9d28e71018280f8eeca9da844_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-19_064464e9d28e71018280f8eeca9da844_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3960
- 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:4208
- - 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\000045FE" 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:2808
  - - 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:3920
  - - 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:4512
  - - 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:1312
  - - 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:1920

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

000045FE

Path C:\Users\Admin\AppData\Roaming\Mozilla\000045FE
Size 105KB
SHA256 53658532cdc22fc0359061dd1ae3d1f34964be3041c64c1a3b9badb97c50332d
MD5 12c28e70863a41b8f057c40fdcd60867
SHA1 1b8120d88848df9482164756040c0c71d8f5ec17
SHA512 82edb1dda99ed7a79c52d30d95cdeed279cb04dbd6466007ded26cbc4ba7c441586e2d5c9c4c0a7a0f4e1051cea939bd694c4519f92f3cf5907da09502e07603
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqeNPWQHEzf:OLsF2Kerc64sTiX2IV0D91zf
TLSH
T13AB32A2B2AA57052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 105KB
SHA256 403e5b350d48999074aa1324042d49e890396bf031518cba88d72c5db1f1c0b5
MD5 064464e9d28e71018280f8eeca9da844
SHA1 e5212fc7b30024742ce7b0dbca71cd691bace7fe
SHA512 a5a357dbfca355e9fe0f376b85011a9f4c134efb3d712f90df1664580fa3669a14dee85f4df2d911a387589a542bb81e565bff42671a795900704e5706712c12
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqeNPWQHEz0:OLsF2Kerc64sTiX2IV0D91z0
TLSH
T1AAB32A2B2AA57052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1920-16-0x0000000000990000-0x0000000000A4B000-memory.dmp

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memory/1920-19-0x0000000000990000-0x0000000000A4B000-memory.dmp

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memory/1920-21-0x0000000000990000-0x0000000000A4B000-memory.dmp

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memory/1920-24-0x0000000000990000-0x0000000000A4B000-memory.dmp

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memory/1920-28-0x0000000000990000-0x0000000000A4B000-memory.dmp

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memory/1920-29-0x0000000000990000-0x0000000000A4B000-memory.dmp

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memory/3960-10-0x00000000009A0000-0x0000000000A5B000-memory.dmp

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memory/4208-13-0x0000000000970000-0x0000000000A2B000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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