juko | 52a64d498331efa1136562f8f720c915a2d80cf4526bea87955397bdf80b80be

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
06/05/2026, 03:49

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-05-06_4c1ca32cd7dbf01088fcd41bb6d98686_elex_wannacry.exe
Size 216KB
Sample260506-ednpases4p
SHA256 52a64d498331efa1136562f8f720c915a2d80cf4526bea87955397bdf80b80be
MD5 4c1ca32cd7dbf01088fcd41bb6d98686
SHA1 50006e29783814895e398ca00d42320b9dc26490
SHA512 29df1e4fd2254695d684d6477074bc8f98f79b3840a29afd0ccae5fd0bc9ee5f334b5802f11365d7608d6169a8a821d0a059a77089a2ffa6df45754b4da16a1e
SSDEEP 3072:uLy2Kerc64CiGImRRLytU+3ZZYRGILCSihxnQDhGgZ:uLy2Kwc64YIcyjIDLCSiDaQa
TLSH
T1CE240A2B905330ACDA1782BCD7EA9671E4747CA41532BD7D5B28FA302F31C616F7A858
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/4764-0-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/files/0x000f000000028e1b-5.dat	family_juko
behavioral2/memory/4764-12-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/memory/2924-16-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b447-17.dat	family_juko
behavioral2/memory/5092-19-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/memory/5092-28-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2924	WINWORD.exe
5092	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-1-5-21-650218026-1419908266-2856590055-1000\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	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	2026-05-06_4c1ca32cd7dbf01088fcd41bb6d98686_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
2732	cmd.exe
5556	PING.EXE
4952	PING.EXE
5052	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4952	PING.EXE
5052	PING.EXE
5556	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4764 wrote to memory of 2924	4764	2026-05-06_4c1ca32cd7dbf01088fcd41bb6d98686_elex_wannacry.exe	79
PID 2924 wrote to memory of 2732	2924	WINWORD.exe	80
PID 2732 wrote to memory of 5556	2732	cmd.exe	82
PID 2732 wrote to memory of 4952	2732	cmd.exe	83
PID 2732 wrote to memory of 5052	2732	cmd.exe	84
PID 2732 wrote to memory of 5092	2732	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-06_4c1ca32cd7dbf01088fcd41bb6d98686_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-06_4c1ca32cd7dbf01088fcd41bb6d98686_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4764
- 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:2924
- - 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\00001FBA" 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:2732
  - - 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:5556
  - - 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:4952
  - - 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:5052
  - - 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:5092

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

Replay Monitor

Loading Replay Monitor...

Downloads

00001FBA

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001FBA
Size 216KB
SHA256 178358fbc7c188144abd76eb7f05c21574680a0b155ff515cae841d5fca87525
MD5 2886d17f5cc35a8c4461653b58047175
SHA1 0063a641e37f6f0d4c98b546f1fc6b24fa48a2d0
SHA512 2bc0f4e69b7db909e956fc8300d156ee0804e83ccc81c0eaccbe963838f3d234563be0c97a94133cee2cbec06a78e69c0d77dfbc9145c6b3eb8e50d4cb611ba5
SSDEEP 3072:uLy2Kerc64CiGImRRLytU+3ZZYRGILCSihxnQDhGgY:uLy2Kwc64YIcyjIDLCSiDaQz
TLSH
T18B240A2B905330ACDA1782BCD7EA9671E4747CA41532BD7D5B28FA302F31C616F7A858
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 216KB
SHA256 52a64d498331efa1136562f8f720c915a2d80cf4526bea87955397bdf80b80be
MD5 4c1ca32cd7dbf01088fcd41bb6d98686
SHA1 50006e29783814895e398ca00d42320b9dc26490
SHA512 29df1e4fd2254695d684d6477074bc8f98f79b3840a29afd0ccae5fd0bc9ee5f334b5802f11365d7608d6169a8a821d0a059a77089a2ffa6df45754b4da16a1e
SSDEEP 3072:uLy2Kerc64CiGImRRLytU+3ZZYRGILCSihxnQDhGgZ:uLy2Kwc64YIcyjIDLCSiDaQa
TLSH
T1CE240A2B905330ACDA1782BCD7EA9671E4747CA41532BD7D5B28FA302F31C616F7A858
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2924-15-0x00000000008B0000-0x000000000092B000-memory.dmp

Download

memory/2924-16-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/4764-0-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/4764-12-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/4764-11-0x0000000000890000-0x000000000090B000-memory.dmp

Download

memory/5092-19-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/5092-20-0x0000000000850000-0x00000000008CB000-memory.dmp

Download

memory/5092-28-0x0000000000400000-0x0000000000436000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads