juko | a52bb5edd9efb29e7fa60760b14825fe04873628af861f40414113c4906eba6c

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
04/05/2026, 12:13

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General

Target
2026-05-04_07b1ac7a0330fdac30e7546815511d9d_elex_wannacry.exe
Size 49KB
Sample260504-pd344aex7p
SHA256 a52bb5edd9efb29e7fa60760b14825fe04873628af861f40414113c4906eba6c
MD5 07b1ac7a0330fdac30e7546815511d9d
SHA1 a2623ed816f96ec94a7e5fa1441c142216515693
SHA512 f4f320be5e96ac9a1206f380b3e3acd7c9d6802e5a9a564b62fec3707c42fc0a202aa28b1275e441b1790a7c0f0f124053af384421475f8362d19fee8a347bf1
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2u:VLy2Kerc64CiGImVucp4kojWh2u
TLSH
T1F7334B0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
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/1168-0-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x000f000000028e1b-5.dat	family_juko
behavioral2/memory/1168-13-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/5032-16-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b3af-17.dat	family_juko
behavioral2/memory/4268-19-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/4268-21-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5032	WINWORD.exe
4268	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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-04_07b1ac7a0330fdac30e7546815511d9d_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
4256	PING.EXE
4996	PING.EXE
2264	cmd.exe
4192	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4192	PING.EXE
4256	PING.EXE
4996	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1168 wrote to memory of 5032	1168	2026-05-04_07b1ac7a0330fdac30e7546815511d9d_elex_wannacry.exe	79
PID 5032 wrote to memory of 2264	5032	WINWORD.exe	80
PID 2264 wrote to memory of 4996	2264	cmd.exe	82
PID 2264 wrote to memory of 4192	2264	cmd.exe	83
PID 2264 wrote to memory of 4256	2264	cmd.exe	84
PID 2264 wrote to memory of 4268	2264	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-04_07b1ac7a0330fdac30e7546815511d9d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-04_07b1ac7a0330fdac30e7546815511d9d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1168
- 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:5032
- - 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\00006AEA" 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:2264
  - - 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:4996
  - - 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:4192
  - - 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:4256
  - - 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:4268

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

00006AEA

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006AEA
Size 49KB
SHA256 96dcc537a7c9ed26dd287b646ff508fb732378f4b99f404fa42cee486d64e914
MD5 3b7e86cad97ef2110bfca9569565a0a6
SHA1 338afc139cbd6f3b9996043a0d48435f9684a474
SHA512 3221e83c8bc3218d0645af8073e9d97cab20279f24acce90ac7f3bc5eca1fcae80fece34f2265d0fd11f9d3160bed214b3c67e6d6e9b590747b7247aec03cede
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2h:VLy2Kerc64CiGImVucp4kojWh2h
TLSH
T142334C0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 49KB
SHA256 a52bb5edd9efb29e7fa60760b14825fe04873628af861f40414113c4906eba6c
MD5 07b1ac7a0330fdac30e7546815511d9d
SHA1 a2623ed816f96ec94a7e5fa1441c142216515693
SHA512 f4f320be5e96ac9a1206f380b3e3acd7c9d6802e5a9a564b62fec3707c42fc0a202aa28b1275e441b1790a7c0f0f124053af384421475f8362d19fee8a347bf1
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2u:VLy2Kerc64CiGImVucp4kojWh2u
TLSH
T1F7334B0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1168-13-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/1168-0-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/1168-12-0x0000000002240000-0x00000000024CB000-memory.dmp

Download

memory/4268-19-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/4268-21-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/4268-20-0x0000000002270000-0x00000000024FB000-memory.dmp

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memory/4268-23-0x0000000002270000-0x00000000024FB000-memory.dmp

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memory/4268-27-0x0000000002270000-0x00000000024FB000-memory.dmp

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memory/4268-33-0x0000000002270000-0x00000000024FB000-memory.dmp

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memory/5032-15-0x00000000025A0000-0x000000000282B000-memory.dmp

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memory/5032-16-0x0000000000400000-0x0000000000420000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads