juko | ced0a7cdc24369a29b9da298bc548555fe925547ecac696a4017e86b2ad32efe

General

Target
2026-09-16_0a9b27e9df15c7ba75a66b9ee152c6ec_elex_wannacry.exe
Size 151KB
Sample260916-rtms6a1gmg
SHA256 ced0a7cdc24369a29b9da298bc548555fe925547ecac696a4017e86b2ad32efe
MD5 0a9b27e9df15c7ba75a66b9ee152c6ec
SHA1 4ca40894ce93e6387081cfc455a5a55bd68245b9
SHA512 b89fa0bf57ca11e0d5486490d6cd8c22522eaaac95979ae7a376844932fe860f024afa91105c6dc3d2ee7fd42839496e9f884717e55b72b7bff59e9b6b090b23
SSDEEP 3072:LLy2Kerc64CiGIm6CjPloaK6Or1kz36Rq4QqjYCr6KNe2aKd/EAGzYMzhq9BMUOh:LLy2Kwc64YIridmrNPyEe2Xd/EPYQsOh
TLSH
T190E36C06A14780F2DC6700B06689ABFF8A359E358421D9E6E798FC5DED739D1A72C307
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 6 IoCs

resource	yara_rule
behavioral2/memory/3644-0-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko
behavioral2/files/0x0009000000016b4d-5.dat	family_juko
behavioral2/memory/3644-10-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko
behavioral2/memory/3916-12-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko
behavioral2/files/0x001300000001c433-13.dat	family_juko
behavioral2/memory/4352-15-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3916	WINWORD.exe
4352	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-1-5-21-1704430598-3087477806-3297458608-1000\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
2476	cmd.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	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	2026-09-16_0a9b27e9df15c7ba75a66b9ee152c6ec_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

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
2476	cmd.exe
1732	PING.EXE
5116	PING.EXE
3328	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1732	PING.EXE
5116	PING.EXE
3328	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3644 wrote to memory of 3916	3644	2026-09-16_0a9b27e9df15c7ba75a66b9ee152c6ec_elex_wannacry.exe	87
PID 3916 wrote to memory of 2476	3916	WINWORD.exe	88
PID 2476 wrote to memory of 1732	2476	cmd.exe	90
PID 2476 wrote to memory of 5116	2476	cmd.exe	91
PID 2476 wrote to memory of 3328	2476	cmd.exe	92
PID 2476 wrote to memory of 4352	2476	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-16_0a9b27e9df15c7ba75a66b9ee152c6ec_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-16_0a9b27e9df15c7ba75a66b9ee152c6ec_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3644
- 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:3916
- - 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\00007E52" 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:2476
  - - 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:1732
  - - 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:5116
  - - 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:3328
  - - 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:4352

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00007E52

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007E52
Size 151KB
SHA256 279c58ba67b1a63da5d6fd6752f16cae2703a952f958198b7dfb447f2c6d5c4d
MD5 1b7c280ca23991028562edb1af6dd5d5
SHA1 683b248ec228a8b05efe9eb28c2ac3c75212029e
SHA512 ea4560fc1730fb983bdfbd2a2a5eacec083e982ba673ccde5176a87754f7e3c879a258d6d9fd8e0353a4e6d85086f681e9ea86c55690268c532178a09f6c0e9a
SSDEEP 3072:LLy2Kerc64CiGIm6CjPloaK6Or1kz36Rq4QqjYCr6KNe2aKd/EAGzYMzhq9BMUOB:LLy2Kwc64YIridmrNPyEe2Xd/EPYQsOB
TLSH
T18AE36C06A14780F2DC6700B06689ABFF8A359E358421D9E6E798FC5DED739D1A72C307
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 151KB
SHA256 ced0a7cdc24369a29b9da298bc548555fe925547ecac696a4017e86b2ad32efe
MD5 0a9b27e9df15c7ba75a66b9ee152c6ec
SHA1 4ca40894ce93e6387081cfc455a5a55bd68245b9
SHA512 b89fa0bf57ca11e0d5486490d6cd8c22522eaaac95979ae7a376844932fe860f024afa91105c6dc3d2ee7fd42839496e9f884717e55b72b7bff59e9b6b090b23
SSDEEP 3072:LLy2Kerc64CiGIm6CjPloaK6Or1kz36Rq4QqjYCr6KNe2aKd/EAGzYMzhq9BMUOh:LLy2Kwc64YIridmrNPyEe2Xd/EPYQsOh
TLSH
T190E36C06A14780F2DC6700B06689ABFF8A359E358421D9E6E798FC5DED739D1A72C307
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3644-0-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/3644-10-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/3916-12-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/4352-15-0x0000000000400000-0x000000000041F000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads