juko | ede73263989f52efd3e53fedfad73239f0b54478701e9afc316de4fd91f3a3cd

General

Target
2026-07-04_102d8dfadd572cde63855316fcaf1d3a_elex_wannacry.exe
Size 64KB
Sample260704-e2re4aa16x
SHA256 ede73263989f52efd3e53fedfad73239f0b54478701e9afc316de4fd91f3a3cd
MD5 102d8dfadd572cde63855316fcaf1d3a
SHA1 81caab4fde3051b28d0d05e126d87586d7549f0a
SHA512 04c5b97eb39f08e598c29ec6ccf8fce5651d8182f30e9ed7336e79a626aa8da14e00268259e9d0b994e0f78e957085eaef83bf4d97f2b222c49bff4305467fcf
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/up:sLy2Kerc64CiGIm8so28p
TLSH
T17A535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x000b00000001b1b6-4.dat	family_juko
behavioral2/files/0x000e00000001c5f3-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4620	WINWORD.exe
6080	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-1-5-21-2639994890-966400312-4246138405-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-04_102d8dfadd572cde63855316fcaf1d3a_elex_wannacry.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
1336	cmd.exe
5708	PING.EXE
2556	PING.EXE
2456	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5708	PING.EXE
2556	PING.EXE
2456	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 4620	4456	2026-07-04_102d8dfadd572cde63855316fcaf1d3a_elex_wannacry.exe	87
PID 4620 wrote to memory of 1336	4620	WINWORD.exe	88
PID 1336 wrote to memory of 5708	1336	cmd.exe	90
PID 1336 wrote to memory of 2556	1336	cmd.exe	91
PID 1336 wrote to memory of 2456	1336	cmd.exe	92
PID 1336 wrote to memory of 6080	1336	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-04_102d8dfadd572cde63855316fcaf1d3a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-04_102d8dfadd572cde63855316fcaf1d3a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4456
- 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:4620
- - 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\00006B98" 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:1336
  - - 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:5708
  - - 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:2556
  - - 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:2456
  - - 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:6080

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

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Downloads

00006B98

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006B98
Size 64KB
SHA256 a421cb6ee8ca97b1d445344eb3cb088c986da1363da8a101b24cc1af67f94d6d
MD5 db3ff3470501726c7219410f3cce0b4a
SHA1 112b442087b6506610e9dfe0eabdf1229d270456
SHA512 b173561cb4027632969a40a19fdac743cf8122aeb392bbc397af2db8d74a86d4d61c356b4886d470270d7530614318ee91e327866db955374c9da47578b317c3
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uu:sLy2Kerc64CiGIm8so28u
TLSH
T1D5535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 ede73263989f52efd3e53fedfad73239f0b54478701e9afc316de4fd91f3a3cd
MD5 102d8dfadd572cde63855316fcaf1d3a
SHA1 81caab4fde3051b28d0d05e126d87586d7549f0a
SHA512 04c5b97eb39f08e598c29ec6ccf8fce5651d8182f30e9ed7336e79a626aa8da14e00268259e9d0b994e0f78e957085eaef83bf4d97f2b222c49bff4305467fcf
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/up:sLy2Kerc64CiGIm8so28p
TLSH
T17A535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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