juko | 0068548736df5f32bac2a4c223c4b4b76d78dc85433a72ab46cb0ae5075237e2

General

Target
2026-08-09_6036d6baa2b0e31559ca02dbcc841726_elex_wannacry.exe
Size 49KB
Sample260809-3zaass1wat
SHA256 0068548736df5f32bac2a4c223c4b4b76d78dc85433a72ab46cb0ae5075237e2
MD5 6036d6baa2b0e31559ca02dbcc841726
SHA1 79d8f249071d852b8cce66595601c9cfafb2ee16
SHA512 9cc334cee7ef5a35a19c02ff00f89386719257113bc0afa85a6388674a44e36cfc2a0dfd696a180415627c1477f8eacabcd9a583b4c219091696b1ceaedf376b
SSDEEP 1536:4LsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2p:4Ly2Kerc64CiGImVu8p4kojWh2p
TLSH
T1AF334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
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 7 IoCs

resource	yara_rule
behavioral2/memory/1468-0-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x000d000000016cd6-5.dat	family_juko
behavioral2/memory/1468-10-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/3360-12-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x000e00000001c612-13.dat	family_juko
behavioral2/memory/2644-15-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/2644-16-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3360	WINWORD.exe
2644	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-1-5-21-3989226554-2204910950-1522900112-1000\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
4732	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	2026-08-09_6036d6baa2b0e31559ca02dbcc841726_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
5784	PING.EXE
2948	PING.EXE
4480	PING.EXE
4732	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2948	PING.EXE
4480	PING.EXE
5784	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1468 wrote to memory of 3360	1468	2026-08-09_6036d6baa2b0e31559ca02dbcc841726_elex_wannacry.exe	88
PID 3360 wrote to memory of 4732	3360	WINWORD.exe	89
PID 4732 wrote to memory of 5784	4732	cmd.exe	91
PID 4732 wrote to memory of 2948	4732	cmd.exe	92
PID 4732 wrote to memory of 4480	4732	cmd.exe	93
PID 4732 wrote to memory of 2644	4732	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-09_6036d6baa2b0e31559ca02dbcc841726_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_6036d6baa2b0e31559ca02dbcc841726_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1468
- 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:3360
- - 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\00006C63" 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:4732
  - - 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:5784
  - - 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:2948
  - - 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:4480
  - - 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:2644

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

Replay Monitor

Loading Replay Monitor...

Downloads

00006C63

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006C63
Size 49KB
SHA256 caf22d6d771a3ad71aee877559a742c38306fc0256c3dfc4be917619d0165a37
MD5 b20ed9f63a449d6b0186a69214166975
SHA1 59f3e3bb2890171ca553a28fd11f7e231b0a386d
SHA512 f450da811a1c7ef3288fd3edf182a71ddbdfdba59741195981fb3e11c6b5b4d03ecb4d1c971bb4ffad2fbdae9252b5bbccdce57577886b1302b250820d69d12a
SSDEEP 1536:4LsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2v:4Ly2Kerc64CiGImVu8p4kojWh2v
TLSH
T1B5334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 49KB
SHA256 0068548736df5f32bac2a4c223c4b4b76d78dc85433a72ab46cb0ae5075237e2
MD5 6036d6baa2b0e31559ca02dbcc841726
SHA1 79d8f249071d852b8cce66595601c9cfafb2ee16
SHA512 9cc334cee7ef5a35a19c02ff00f89386719257113bc0afa85a6388674a44e36cfc2a0dfd696a180415627c1477f8eacabcd9a583b4c219091696b1ceaedf376b
SSDEEP 1536:4LsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2p:4Ly2Kerc64CiGImVu8p4kojWh2p
TLSH
T1AF334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1468-0-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/1468-10-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/2644-15-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/2644-16-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/3360-12-0x0000000000400000-0x0000000000420000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads