juko | 36011e9bccaa24fc364c1651ad0acfa040a995cc7bf301b35e735e1a1596941b

General

Target
2026-08-14_dc617d0b5e489bc170abd9a52397d50c_elex_wannacry.exe
Size 32KB
Sample260814-2vpdgstyfv
SHA256 36011e9bccaa24fc364c1651ad0acfa040a995cc7bf301b35e735e1a1596941b
MD5 dc617d0b5e489bc170abd9a52397d50c
SHA1 9d56ab0e2ef71b72c7d5a850d9a8d4c5b8be4ab4
SHA512 b83f3b7b72a562c8f0a357cd5c85dd4a8fe24afee47c9571607c75adce14f8608e31aac1799b2806ecbe2bf9324e2e42d1548b23dea8622bd64b75c00d12ff6b
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7R:ZLsF2Kerc64sTiX2IV0DKy7R
TLSH
T166E23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
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
behavioral1/files/0x0014000000024346-4.dat	family_juko
behavioral1/files/0x000400000001e699-12.dat	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	2026-08-14_dc617d0b5e489bc170abd9a52397d50c_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4344	WINWORD.exe
3632	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-1-5-21-2937465464-4167303362-2236413517-1000\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
4496	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	2026-08-14_dc617d0b5e489bc170abd9a52397d50c_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
4496	cmd.exe
3320	PING.EXE
4660	PING.EXE
3340	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3340	PING.EXE
3320	PING.EXE
4660	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1596 wrote to memory of 4344	1596	2026-08-14_dc617d0b5e489bc170abd9a52397d50c_elex_wannacry.exe	85
PID 4344 wrote to memory of 4496	4344	WINWORD.exe	87
PID 4496 wrote to memory of 3320	4496	cmd.exe	89
PID 4496 wrote to memory of 4660	4496	cmd.exe	90
PID 4496 wrote to memory of 3340	4496	cmd.exe	91
PID 4496 wrote to memory of 3632	4496	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-14_dc617d0b5e489bc170abd9a52397d50c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-14_dc617d0b5e489bc170abd9a52397d50c_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1596
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4344
- - 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\0000580F" 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:4496
  - - 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:3320
  - - 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:4660
  - - 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:3340
  - - 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:3632

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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

0000580F

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000580F
Size 32KB
SHA256 947eee059d78a805383b17d765d8ee710d24a9ade23f9e3e0bf8a1afa75513c5
MD5 1851d2944c09605ad6ad042394c5096b
SHA1 aa0b3640a3dbea9f1d7ad4fbb94a7b8591f56e93
SHA512 831769ebbbd3f7c94252cc837d83246773ce276f5e67af1e65745c3eb20e5ad21028a72e9dce381829b8bf757d7a0f2e36be19df023bc9c06706c5162bd86322
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7X:ZLsF2Kerc64sTiX2IV0DKy7X
TLSH
T16FE23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 36011e9bccaa24fc364c1651ad0acfa040a995cc7bf301b35e735e1a1596941b
MD5 dc617d0b5e489bc170abd9a52397d50c
SHA1 9d56ab0e2ef71b72c7d5a850d9a8d4c5b8be4ab4
SHA512 b83f3b7b72a562c8f0a357cd5c85dd4a8fe24afee47c9571607c75adce14f8608e31aac1799b2806ecbe2bf9324e2e42d1548b23dea8622bd64b75c00d12ff6b
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7R:ZLsF2Kerc64sTiX2IV0DKy7R
TLSH
T166E23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
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