juko | 48ea964e55ff55422cccebcac2f7ebc072db467e4c72905ddbd1fb6faec4979b

General

Target
2026-10-11_889b801a7c7d2f1504edec1884b346f4_elex_wannacry.exe
Size 53KB
Sample261012-vedtgsvs2l
SHA256 48ea964e55ff55422cccebcac2f7ebc072db467e4c72905ddbd1fb6faec4979b
MD5 889b801a7c7d2f1504edec1884b346f4
SHA1 ad76c23965dc3c04dd1c52dea5157a99704de643
SHA512 12b7bc2f0a2e8bbbd6072d978dd4f110a788ef19bc6da43a318a17465253224a8fd65e7ad37909302a9486890359ed0c865ff784d03fd826026b04ecb79f7817
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2D:3Ly2Kerc64CiGIm1tcBMUOOFD
TLSH
T1EE335C176A459056C0BB52B0FC894F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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/0x00080000000187c7-3.dat	family_juko
behavioral2/files/0x001700000001c54f-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2396	WINWORD.exe
4980	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-1-5-21-4154726816-2055034831-2297277433-1000\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
3360	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\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	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	2026-10-11_889b801a7c7d2f1504edec1884b346f4_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
3360	cmd.exe
3904	PING.EXE
4888	PING.EXE
3696	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3904	PING.EXE
4888	PING.EXE
3696	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 2396	4788	2026-10-11_889b801a7c7d2f1504edec1884b346f4_elex_wannacry.exe	88
PID 2396 wrote to memory of 3360	2396	WINWORD.exe	89
PID 3360 wrote to memory of 3904	3360	cmd.exe	91
PID 3360 wrote to memory of 4888	3360	cmd.exe	92
PID 3360 wrote to memory of 3696	3360	cmd.exe	93
PID 3360 wrote to memory of 4980	3360	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-10-11_889b801a7c7d2f1504edec1884b346f4_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-11_889b801a7c7d2f1504edec1884b346f4_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4788
- 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:2396
- - 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\0000646A" 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:3360
  - - 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:3904
  - - 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:4888
  - - 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:3696
  - - 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:4980

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

0000646A

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000646A
Size 53KB
SHA256 b6e9a27aa4128ef8e9e9d0daf2a3af0f34751f8f6c0dbb7731b635b5450f32aa
MD5 26ab85552979dd040733d867c50c9698
SHA1 1f2a5a9c7de0dcb5254e167d656544945dcc9ebc
SHA512 a6f48a9a988f6788e3bcdd6136c025791d30dec9f7f29142094f85da15bf6d621fd6b5c6daf1f534adbcb69a0fda771f74d9a77047682e41d873cae69a22f9e5
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq26:3Ly2Kerc64CiGIm1tcBMUOOF6
TLSH
T1D3335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 53KB
SHA256 48ea964e55ff55422cccebcac2f7ebc072db467e4c72905ddbd1fb6faec4979b
MD5 889b801a7c7d2f1504edec1884b346f4
SHA1 ad76c23965dc3c04dd1c52dea5157a99704de643
SHA512 12b7bc2f0a2e8bbbd6072d978dd4f110a788ef19bc6da43a318a17465253224a8fd65e7ad37909302a9486890359ed0c865ff784d03fd826026b04ecb79f7817
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2D:3Ly2Kerc64CiGIm1tcBMUOOFD
TLSH
T1EE335C176A459056C0BB52B0FC894F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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