juko | 589ac61d43a1a6a1e264cedf498abaedccd54cff09a1a8c0a22f2382c5584a60

Analysis

max time kernel
149s
max time network
129s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
22/04/2026, 02:44

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-04-22_38a4afd889493d6b38fd0875f209083e_elex_wannacry.exe
Size 49KB
Sample260422-c8dfpsbw51
SHA256 589ac61d43a1a6a1e264cedf498abaedccd54cff09a1a8c0a22f2382c5584a60
MD5 38a4afd889493d6b38fd0875f209083e
SHA1 5a6670d97a5d09ddf49632c47bfe46f365a5b9e3
SHA512 c5c8e131b14d1165afcf611a37b8e18786e2e84c34f0eb30b7ca5568bccbfd111413523c7dbacd4b0f8ec7cd2d1cc80a325303ed916c9726e3c030f8065d3499
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2e:VLy2Kerc64CiGImVucp4kojWh2e
TLSH
T102334C0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
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/4456-0-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x001d00000002b416-5.dat	family_juko
behavioral2/memory/4456-13-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/6000-16-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b44a-17.dat	family_juko
behavioral2/memory/5284-19-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/5284-21-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
6000	WINWORD.exe
5284	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-1-5-21-2397528088-2630719772-1129911217-1000\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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-22_38a4afd889493d6b38fd0875f209083e_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

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
2584	PING.EXE
4576	PING.EXE
1676	cmd.exe
3716	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4576	PING.EXE
3716	PING.EXE
2584	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 6000	4456	2026-04-22_38a4afd889493d6b38fd0875f209083e_elex_wannacry.exe	79
PID 6000 wrote to memory of 1676	6000	WINWORD.exe	80
PID 1676 wrote to memory of 3716	1676	cmd.exe	82
PID 1676 wrote to memory of 2584	1676	cmd.exe	83
PID 1676 wrote to memory of 4576	1676	cmd.exe	84
PID 1676 wrote to memory of 5284	1676	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-04-22_38a4afd889493d6b38fd0875f209083e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-22_38a4afd889493d6b38fd0875f209083e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4456
- 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:6000
- - 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\00006375" 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:1676
  - - 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:3716
  - - 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:2584
  - - 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:4576
  - - 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:5284

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

00006375

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006375
Size 49KB
SHA256 83ce8fd73ca2a4d83a890445fd1867b88b3f18c37faf288753cafd81f5fc445b
MD5 e54f6daeaf4165dfeb423edfbf3d9cea
SHA1 8b0c1a3cd1b57e96578760a16fa374ef890b3572
SHA512 c990455dbff2afe3d11f3189648dc2ce69e32383478094a631249626aca237f5f0d0e363233a7f7124736fc0750ae78be7d1db036f1e0cc46cb60e3c3ad2a7c1
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2w:VLy2Kerc64CiGImVucp4kojWh2w
TLSH
T11E334B0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 49KB
SHA256 589ac61d43a1a6a1e264cedf498abaedccd54cff09a1a8c0a22f2382c5584a60
MD5 38a4afd889493d6b38fd0875f209083e
SHA1 5a6670d97a5d09ddf49632c47bfe46f365a5b9e3
SHA512 c5c8e131b14d1165afcf611a37b8e18786e2e84c34f0eb30b7ca5568bccbfd111413523c7dbacd4b0f8ec7cd2d1cc80a325303ed916c9726e3c030f8065d3499
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2e:VLy2Kerc64CiGImVucp4kojWh2e
TLSH
T102334C0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4456-0-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/4456-12-0x0000000002580000-0x00000000025E4000-memory.dmp

Download

memory/4456-13-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5284-19-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5284-20-0x0000000002070000-0x00000000020D4000-memory.dmp

Download

memory/5284-21-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/6000-15-0x0000000002590000-0x00000000025F4000-memory.dmp

Download

memory/6000-16-0x0000000000400000-0x0000000000420000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads