juko | e0a8f792c8d07ad8ee0ab430efeeb2447dc879e57f59df593770f970cfd3f8cf

General

Target
2026-10-17_5cf604e3e3617d8864a23bd0ff7140f7_elex_wannacry.exe
Size 32KB
Sample261019-esc64set7v
SHA256 e0a8f792c8d07ad8ee0ab430efeeb2447dc879e57f59df593770f970cfd3f8cf
MD5 5cf604e3e3617d8864a23bd0ff7140f7
SHA1 94fa8dd24f9b644b67a3d92e94703c6406e9a1df
SHA512 c3feb61357df945f5390994ccfb58e097caaaed898c3df0139ba9f808db32760b0355fead917d62303863ffd786bb543bea601592853d4e9b6b3ae9962f7677c
SSDEEP 768:5ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHp1:DLsF2Kerc64sTiX2IV0Dhu1
TLSH
T105E24A1B2AA17052C59320B0FA991F34C47D4CB6116BB066FB417B6928B2D63CFB1DDE
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/0x00080000000004e8-3.dat	family_juko
behavioral1/files/0x001300000001e549-12.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-1-5-21-895009113-1202185046-1686627690-1000\Control Panel\International\Geo\Nation	2026-10-17_5cf604e3e3617d8864a23bd0ff7140f7_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-895009113-1202185046-1686627690-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
2860	WINWORD.exe
1904	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-1-5-21-895009113-1202185046-1686627690-1000\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
4004	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.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	2026-10-17_5cf604e3e3617d8864a23bd0ff7140f7_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
4004	cmd.exe
1808	PING.EXE
3996	PING.EXE
2392	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1808	PING.EXE
3996	PING.EXE
2392	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3468 wrote to memory of 2860	3468	2026-10-17_5cf604e3e3617d8864a23bd0ff7140f7_elex_wannacry.exe	87
PID 2860 wrote to memory of 4004	2860	WINWORD.exe	88
PID 4004 wrote to memory of 1808	4004	cmd.exe	90
PID 4004 wrote to memory of 3996	4004	cmd.exe	93
PID 4004 wrote to memory of 2392	4004	cmd.exe	96
PID 4004 wrote to memory of 1904	4004	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\2026-10-17_5cf604e3e3617d8864a23bd0ff7140f7_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-17_5cf604e3e3617d8864a23bd0ff7140f7_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3468
- 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:2860
- - 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\00004D93" 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:4004
  - - 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:1808
  - - 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:3996
  - - 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:2392
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:1904

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

00004D93

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004D93
Size 32KB
SHA256 b4ba0890d0fb3c2e48b2b7ee3fd7fb0aa9d13b42e83e3f9709259c901784b014
MD5 8066b50d819abe30d5c71991c011d578
SHA1 ed0d6f350e136b4e39238642a8bc35736d81d016
SHA512 6d1e79a829b9c84b9eaae32d5190e2a0526ce84ca4b0e658310ad89caec59e7a8c7a4932142a6dc1ee09fd5dbdac3a2c17cf27c706889577b1ef4a8dff450ad8
SSDEEP 768:5ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpp:DLsF2Kerc64sTiX2IV0Dhup
TLSH
T1C0E24A1B2AA17052C59320B0FA991F34C47D4CB6116BB066FB417B6928B2D63CFB1DDE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 e0a8f792c8d07ad8ee0ab430efeeb2447dc879e57f59df593770f970cfd3f8cf
MD5 5cf604e3e3617d8864a23bd0ff7140f7
SHA1 94fa8dd24f9b644b67a3d92e94703c6406e9a1df
SHA512 c3feb61357df945f5390994ccfb58e097caaaed898c3df0139ba9f808db32760b0355fead917d62303863ffd786bb543bea601592853d4e9b6b3ae9962f7677c
SSDEEP 768:5ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHp1:DLsF2Kerc64sTiX2IV0Dhu1
TLSH
T105E24A1B2AA17052C59320B0FA991F34C47D4CB6116BB066FB417B6928B2D63CFB1DDE
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