juko | e9593bcb32b22b080b6b99998f1efebbb8cd1a27b041540c206dbb4e9aac3948

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
25/04/2026, 15:25

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General

Target
2026-04-25_582c91e7068ee23a65ba5448a03cc2b1_elex_wannacry.exe
Size 216KB
Sample260425-st2sract4t
SHA256 e9593bcb32b22b080b6b99998f1efebbb8cd1a27b041540c206dbb4e9aac3948
MD5 582c91e7068ee23a65ba5448a03cc2b1
SHA1 d5ba5b95974a448625c3782c6c1dab306d0a086f
SHA512 8da7339af2c06746aea01aa2b187668c8e9f13fea856d49f6dc14b60327b885e17cdce9a6a48562fef2848f218641580ec9c2b7f7e50aa2e07dd0ef95796ba95
SSDEEP 3072:uLy2Kerc64CiGImRRLytU+3ZZYRGILCSihxnQDhGgH:uLy2Kwc64YIcyjIDLCSiDaQE
TLSH
T19B240A2B905330ACDA1782BCD7EA9671E4747CA41532BD7D5B28FA302F31C616F7A858
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 7 IoCs

resource	yara_rule
behavioral2/memory/1064-0-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/files/0x0010000000025aaf-5.dat	family_juko
behavioral2/memory/1064-12-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/memory/1824-16-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b3d7-17.dat	family_juko
behavioral2/memory/3436-19-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/memory/3436-28-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1824	WINWORD.exe
3436	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-1-5-21-1383858298-2057492509-1726743289-1000\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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-25_582c91e7068ee23a65ba5448a03cc2b1_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

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
4820	PING.EXE
2388	PING.EXE
1432	PING.EXE
2864	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4820	PING.EXE
2388	PING.EXE
1432	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1064 wrote to memory of 1824	1064	2026-04-25_582c91e7068ee23a65ba5448a03cc2b1_elex_wannacry.exe	80
PID 1824 wrote to memory of 2864	1824	WINWORD.exe	81
PID 2864 wrote to memory of 4820	2864	cmd.exe	83
PID 2864 wrote to memory of 2388	2864	cmd.exe	84
PID 2864 wrote to memory of 1432	2864	cmd.exe	85
PID 2864 wrote to memory of 3436	2864	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-25_582c91e7068ee23a65ba5448a03cc2b1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-25_582c91e7068ee23a65ba5448a03cc2b1_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1064
- 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:1824
- - 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\000038E3" 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:2864
  - - 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:4820
  - - 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:2388
  - - 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:1432
  - - 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:3436

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

000038E3

Path C:\Users\Admin\AppData\Roaming\Mozilla\000038E3
Size 216KB
SHA256 20c178822050d902734a3d442a3bb266c1d18b40ea0e0118fb428d19f87da2d9
MD5 426be049a5d25264eb7eac99eac6249e
SHA1 b39f71a085441a0c20b34990a26e95a742653da0
SHA512 fb4075f925669c6c0f2179a6d31f3294edda114fc034220e479c299b477ba4106d616a8e8f971aa7e488a4ea77ce263d97fe55bafa993bcb1764e5920a9da009
SSDEEP 3072:uLy2Kerc64CiGImRRLytU+3ZZYRGILCSihxnQDhGg+:uLy2Kwc64YIcyjIDLCSiDaQJ
TLSH
T173240A2B905330ACDA1782BCD7EA9671E4747CA41532BD7D5B28FA302F31C616F7A858
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 216KB
SHA256 e9593bcb32b22b080b6b99998f1efebbb8cd1a27b041540c206dbb4e9aac3948
MD5 582c91e7068ee23a65ba5448a03cc2b1
SHA1 d5ba5b95974a448625c3782c6c1dab306d0a086f
SHA512 8da7339af2c06746aea01aa2b187668c8e9f13fea856d49f6dc14b60327b885e17cdce9a6a48562fef2848f218641580ec9c2b7f7e50aa2e07dd0ef95796ba95
SSDEEP 3072:uLy2Kerc64CiGImRRLytU+3ZZYRGILCSihxnQDhGgH:uLy2Kwc64YIcyjIDLCSiDaQE
TLSH
T19B240A2B905330ACDA1782BCD7EA9671E4747CA41532BD7D5B28FA302F31C616F7A858
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1064-0-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/1064-11-0x00000000008A0000-0x00000000008EA000-memory.dmp

Download

memory/1064-12-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/1824-15-0x0000000000660000-0x00000000006AA000-memory.dmp

Download

memory/1824-16-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/3436-19-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/3436-20-0x0000000000870000-0x00000000008BA000-memory.dmp

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memory/3436-28-0x0000000000400000-0x0000000000436000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads