juko | c060f6fc7c0a69739c1368422eb750889f10869d21729fec118441b8b4c99d4a

General

Target
2026-10-28_c656178ae75c2f105e9e78bbdb2ef38d_elex_wannacry.exe
Size 32KB
Sample261029-xnmtvssthx
SHA256 c060f6fc7c0a69739c1368422eb750889f10869d21729fec118441b8b4c99d4a
MD5 c656178ae75c2f105e9e78bbdb2ef38d
SHA1 ee91163c8969f16deb2273269f6f1eb1d81543ba
SHA512 a7174b0624e5381c76a98b9cccbb2628906c2a00f4e988d29f569328e0978b5efd63931060e120a50dad35e97c757175075cf553afc6af638c71899b26f518c4
SSDEEP 768:2ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqxNPWQH4lGg:iLsF2Kerc64sTiX2IV0D2h5
TLSH
T1BBE23A2B6AA17052C59320F0F9592F34C43D9DB9116BB062F7417B6928B2D63CF71ACE
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/0x0005000000023257-3.dat	family_juko
behavioral1/files/0x000900000002453f-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-1-5-21-747854149-4118156852-591593384-1000\Control Panel\International\Geo\Nation	2026-10-28_c656178ae75c2f105e9e78bbdb2ef38d_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-747854149-4118156852-591593384-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
1904	WINWORD.exe
3480	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-1-5-21-747854149-4118156852-591593384-1000\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
3516	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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-28_c656178ae75c2f105e9e78bbdb2ef38d_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
3516	cmd.exe
2812	PING.EXE
2464	PING.EXE
1188	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2812	PING.EXE
2464	PING.EXE
1188	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 456 wrote to memory of 1904	456	2026-10-28_c656178ae75c2f105e9e78bbdb2ef38d_elex_wannacry.exe	85
PID 1904 wrote to memory of 3516	1904	WINWORD.exe	86
PID 3516 wrote to memory of 2812	3516	cmd.exe	88
PID 3516 wrote to memory of 2464	3516	cmd.exe	91
PID 3516 wrote to memory of 1188	3516	cmd.exe	94
PID 3516 wrote to memory of 3480	3516	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-28_c656178ae75c2f105e9e78bbdb2ef38d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-28_c656178ae75c2f105e9e78bbdb2ef38d_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:456
- 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:1904
- - 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\00006D24" 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:3516
  - - 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:2812
  - - 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:2464
  - - 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:1188
  - - 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:3480

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

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Downloads

00006D24

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006D24
Size 32KB
SHA256 074d69b68af5d01f00f3e9e01302c06de1af0543e82d45f45dffee0a6cf6eab0
MD5 4a548ff6fcb14cfdc2dbea369db6a4a2
SHA1 c511c0b25dda06a8950d1824d43202083bba9de5
SHA512 8440ccd91f652e378b387c3b8cd78eed951a9b70073e7c07305174ef7c658d926aa8bd9d611296a070b1bed8f0b9d267971343d0c24eb75bbcc8f5b0c058a755
SSDEEP 768:2ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqxNPWQH4lGR:iLsF2Kerc64sTiX2IV0D2hw
TLSH
T156E22A2B6AA17052C59320F0F9592F34C43D9DB9116BB062F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 c060f6fc7c0a69739c1368422eb750889f10869d21729fec118441b8b4c99d4a
MD5 c656178ae75c2f105e9e78bbdb2ef38d
SHA1 ee91163c8969f16deb2273269f6f1eb1d81543ba
SHA512 a7174b0624e5381c76a98b9cccbb2628906c2a00f4e988d29f569328e0978b5efd63931060e120a50dad35e97c757175075cf553afc6af638c71899b26f518c4
SSDEEP 768:2ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqxNPWQH4lGg:iLsF2Kerc64sTiX2IV0D2h5
TLSH
T1BBE23A2B6AA17052C59320F0F9592F34C43D9DB9116BB062F7417B6928B2D63CF71ACE
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