juko | aed00d3460541a7da5aa143873ee4f7e339613aaec655a1055367494ea2db352

General

Target
2026-07-11_95b4a75c045168b4e883821c0e1917b0_elex_wannacry.exe
Size 105KB
Sample260711-s8pfzaet2n
SHA256 aed00d3460541a7da5aa143873ee4f7e339613aaec655a1055367494ea2db352
MD5 95b4a75c045168b4e883821c0e1917b0
SHA1 85743226173b9eaa6600cfeee9a827a9a46552d4
SHA512 8606dd9e5640945e6b083b7df779049304b6b91c4d048dd349da63c06d8b2ffe2f9b95c0ae9f04d61f1d6ce36563263f9a7db29aff295628389973fac940591b
SSDEEP 768:mZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2L5:SLsF2Kerc64sTiX2IV0DVk2L5
TLSH
T120B32A2B2AA17052C59320F0F9591F34C43E9DB5116BB0A2F7417B6928B6D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery 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/0x000a00000001b312-4.dat	family_juko
behavioral2/files/0x000e00000001c487-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2040	WINWORD.exe
5516	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-1-5-21-1875162379-3804078649-638427191-1000\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

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	2026-07-11_95b4a75c045168b4e883821c0e1917b0_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
824	PING.EXE
4904	PING.EXE
5084	cmd.exe
5772	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
824	PING.EXE
4904	PING.EXE
5772	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5328 wrote to memory of 2040	5328	2026-07-11_95b4a75c045168b4e883821c0e1917b0_elex_wannacry.exe	87
PID 2040 wrote to memory of 5084	2040	WINWORD.exe	88
PID 5084 wrote to memory of 5772	5084	cmd.exe	90
PID 5084 wrote to memory of 824	5084	cmd.exe	91
PID 5084 wrote to memory of 4904	5084	cmd.exe	92
PID 5084 wrote to memory of 5516	5084	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-11_95b4a75c045168b4e883821c0e1917b0_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-11_95b4a75c045168b4e883821c0e1917b0_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5328
- 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:2040
- - 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\00004254" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:5084
  - - 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:5772
  - - 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:824
  - - 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:4904
  - - 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:5516

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

00004254

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004254
Size 105KB
SHA256 6da2e91ef7fdb9285c510ef5804b066c780bf760813a3b7035d9c920a963d182
MD5 88d49e8a34f6b945c6a815ea245692e4
SHA1 08fcb82d21d7c08e620fc9f4a2402c7dbe23c4f2
SHA512 5beb76215d3ed674370c868e19f82009dfccd351933620764cbaebfbdd95e56e2bf2e1e307ae26a095cf3da242e2647f42f520d453fac5ea76ec330d59edb3b2
SSDEEP 768:mZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2Lg:SLsF2Kerc64sTiX2IV0DVk2Lg
TLSH
T127B31A2B2AA17052C59320F0F9591F34C43E9DB5116BB0A2F7417B6928B6D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 105KB
SHA256 aed00d3460541a7da5aa143873ee4f7e339613aaec655a1055367494ea2db352
MD5 95b4a75c045168b4e883821c0e1917b0
SHA1 85743226173b9eaa6600cfeee9a827a9a46552d4
SHA512 8606dd9e5640945e6b083b7df779049304b6b91c4d048dd349da63c06d8b2ffe2f9b95c0ae9f04d61f1d6ce36563263f9a7db29aff295628389973fac940591b
SSDEEP 768:mZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2L5:SLsF2Kerc64sTiX2IV0DVk2L5
TLSH
T120B32A2B2AA17052C59320F0F9591F34C43E9DB5116BB0A2F7417B6928B6D63CF71ACE
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