juko | 7d322aa02afdaf2ae9043cd780dba6d7eef304ed31a4b9b2c03c219e969dbd54

General

Target
2026-10-14_9fbf0e50d5058694814915094e46a6db_elex_wannacry.exe
Size 47KB
Sample261014-s3epksxtfx
SHA256 7d322aa02afdaf2ae9043cd780dba6d7eef304ed31a4b9b2c03c219e969dbd54
MD5 9fbf0e50d5058694814915094e46a6db
SHA1 0f8e745e4c5ebc6fe822a00fbec7267ff23a46bf
SHA512 910f4dcb81391915ae5ed85597b72b67e2e0507fb87182da3afa4deedbced5f6f7b384d8bff9edf4d1c58dbaff02a94e6e8997338c8283b79f984ae0005e574c
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX64:ALsF2Kerc64sTiX2IV0DZZTo4
TLSH
T150235A1BFE616052C19611B0FD699F3985799CB4047BB162B780BB1D28B2DA3CF709CD
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/0x000800000001b85a-3.dat	family_juko
behavioral2/files/0x000f00000001c4f1-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3752	WINWORD.exe
2776	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-1-5-21-1404337215-1550464601-2805570857-1000\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
4660	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-14_9fbf0e50d5058694814915094e46a6db_elex_wannacry.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
5784	PING.EXE
5776	PING.EXE
4392	PING.EXE
4660	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5784	PING.EXE
5776	PING.EXE
4392	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 3752	1376	2026-10-14_9fbf0e50d5058694814915094e46a6db_elex_wannacry.exe	88
PID 3752 wrote to memory of 4660	3752	WINWORD.exe	89
PID 4660 wrote to memory of 5784	4660	cmd.exe	91
PID 4660 wrote to memory of 5776	4660	cmd.exe	92
PID 4660 wrote to memory of 4392	4660	cmd.exe	93
PID 4660 wrote to memory of 2776	4660	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-10-14_9fbf0e50d5058694814915094e46a6db_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-14_9fbf0e50d5058694814915094e46a6db_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1376
- 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:3752
- - 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\00007B61" 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:4660
  - - 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:5784
  - - 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:5776
  - - 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:4392
  - - 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:2776

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

00007B61

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007B61
Size 47KB
SHA256 368290522568554dd2fa77f9f4383bf1f8ed659328e01192f2d3701da639b9f4
MD5 c8efbb66f75726a52de7889efe90a5ff
SHA1 23996519aca94a07ec5a33d369ebf85ac1d7888c
SHA512 ba8d60e5c70ed07b8c50e72506af84924c458ee8c7000abda1a57119e27bc3e8417af550f312627d7b94a655cbee4b032f8696a80fa4300d5a185e0bebb47c3f
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX6W:ALsF2Kerc64sTiX2IV0DZZToW
TLSH
T14B235A1BFE616052C18611B0FD699F3585799CB0047BB162B780BB1D28B2DA3CF709CD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 47KB
SHA256 7d322aa02afdaf2ae9043cd780dba6d7eef304ed31a4b9b2c03c219e969dbd54
MD5 9fbf0e50d5058694814915094e46a6db
SHA1 0f8e745e4c5ebc6fe822a00fbec7267ff23a46bf
SHA512 910f4dcb81391915ae5ed85597b72b67e2e0507fb87182da3afa4deedbced5f6f7b384d8bff9edf4d1c58dbaff02a94e6e8997338c8283b79f984ae0005e574c
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX64:ALsF2Kerc64sTiX2IV0DZZTo4
TLSH
T150235A1BFE616052C19611B0FD699F3985799CB4047BB162B780BB1D28B2DA3CF709CD
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