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
behavioral2/files/0x001100000001c4fd-4.dat	family_juko
behavioral2/files/0x001000000001c57d-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
468	WINWORD.exe
5328	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-1-5-21-552508041-2681165170-3229858294-1000\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
2416	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	2026-08-14_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

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
2416	cmd.exe
5828	PING.EXE
4116	PING.EXE
728	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4116	PING.EXE
728	PING.EXE
5828	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 468	4936	2026-08-14_dc617d0b5e489bc170abd9a52397d50c_elex_wannacry.exe	89
PID 468 wrote to memory of 2416	468	WINWORD.exe	90
PID 2416 wrote to memory of 5828	2416	cmd.exe	92
PID 2416 wrote to memory of 4116	2416	cmd.exe	93
PID 2416 wrote to memory of 728	2416	cmd.exe	94
PID 2416 wrote to memory of 5328	2416	cmd.exe	95

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⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4936
- 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:468
- - 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\00006FBC" 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:2416
  - - 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:5828
  - - 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:4116
  - - 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:728
  - - 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:5328

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

00006FBC

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006FBC
Size 32KB
SHA256 2cea0e9086833d718804212358bc6150eebdb86c33191ca2df94eb14e3c2b194
MD5 2b53e9f11fd803e2eaed6438faac0b37
SHA1 d747944eb58950731b2fa18d3494967b64386cf2
SHA512 0a4b48347bd092228ff8ee150d9002a95b0fccac6a9fc19de291493cedda1bbaca09e964175e0256ac850613dfe5a44856a0eb7fb605e6d89b32e4843a60cd71
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7g:ZLsF2Kerc64sTiX2IV0DKy7g
TLSH
T19BE23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
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