juko | 87c10a1943a67bf6f358b74a37981d5afbbb8f28b7f2ceb2536c7079d5ce2fbf

General

Target
2026-08-11_e7d10ad061bc9565250f0fd971c36231_elex_wannacry.exe
Size 30KB
Sample260811-n6tkpasdqd
SHA256 87c10a1943a67bf6f358b74a37981d5afbbb8f28b7f2ceb2536c7079d5ce2fbf
MD5 e7d10ad061bc9565250f0fd971c36231
SHA1 27aec8eb1989621d3ec54b977ffdb76d900cb042
SHA512 03cbe0143c88d4809c50b1f86bc96884d9017cf72831fd79697c3f402f390874be5018143a4430f413f48ee2eff9de268f1af9c45128978233c1739999f004f1
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXU:tLsF2Kerc64sTiX2IV0DzloU
TLSH
T192E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x000c000000019cb8-4.dat	family_juko
behavioral2/files/0x000f00000001c533-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2776	WINWORD.exe
1744	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-1-5-21-3797332335-34111092-3597280141-1000\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
4444	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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-11_e7d10ad061bc9565250f0fd971c36231_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

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
4444	cmd.exe
1596	PING.EXE
1772	PING.EXE
256	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1596	PING.EXE
1772	PING.EXE
256	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4680 wrote to memory of 2776	4680	2026-08-11_e7d10ad061bc9565250f0fd971c36231_elex_wannacry.exe	88
PID 2776 wrote to memory of 4444	2776	WINWORD.exe	89
PID 4444 wrote to memory of 1596	4444	cmd.exe	91
PID 4444 wrote to memory of 1772	4444	cmd.exe	92
PID 4444 wrote to memory of 256	4444	cmd.exe	93
PID 4444 wrote to memory of 1744	4444	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-11_e7d10ad061bc9565250f0fd971c36231_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-11_e7d10ad061bc9565250f0fd971c36231_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4680
- 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:2776
- - 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\00005E45" 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:4444
  - - 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:1596
  - - 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:1772
  - - 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:256
  - - 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:1744

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

00005E45

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005E45
Size 30KB
SHA256 819122a2f13549da94ec824dee170177cba597b97ea0b319d9af0d241c2868f3
MD5 d860aa7dc44cf21306bb6b956788dcb2
SHA1 d68d6217e3db6113f0dc803cb8e74a076c16ad95
SHA512 a72996e1bf59b77f75cdd5bb303458f249e28cdf4539e1e8f9787c89b3e271326b3f3f8a35bfd92dd6eb5a8a30a2be9e4c8923ecbe03cf052a755f40b2f114b6
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHX7:tLsF2Kerc64sTiX2IV0Dzlo7
TLSH
T105E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 87c10a1943a67bf6f358b74a37981d5afbbb8f28b7f2ceb2536c7079d5ce2fbf
MD5 e7d10ad061bc9565250f0fd971c36231
SHA1 27aec8eb1989621d3ec54b977ffdb76d900cb042
SHA512 03cbe0143c88d4809c50b1f86bc96884d9017cf72831fd79697c3f402f390874be5018143a4430f413f48ee2eff9de268f1af9c45128978233c1739999f004f1
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXU:tLsF2Kerc64sTiX2IV0DzloU
TLSH
T192E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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