juko | 116e492159d2bb191ce58e82aa6d91ba074b2d189e4a4e7dd22efe05546ef43b

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
16/04/2026, 08:33

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-04-16_363943c130a22287de4944938ebc5df1_elex_wannacry.exe
Size 68KB
Sample260416-kfvhhset9s
SHA256 116e492159d2bb191ce58e82aa6d91ba074b2d189e4a4e7dd22efe05546ef43b
MD5 363943c130a22287de4944938ebc5df1
SHA1 2feded048e9c5b9fd59d76c44a0df1177f372373
SHA512 fe57b1790218df7a532b48796acb65e11801cb83ca71ac6f724f6f449491d81300b2622f2f89158e9227e5e9a666a3598ea26c503da6612afb50edf680501f3b
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpf:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpf
TLSH
T17663A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D138FDE8C6
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
behavioral1/memory/2152-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/files/0x000c0000000241b4-5.dat	family_juko
behavioral1/memory/2152-12-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/memory/4516-16-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/files/0x000900000002438f-17.dat	family_juko
behavioral1/memory/468-19-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/memory/468-21-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-745935970-1373868228-562466063-1000\Control Panel\International\Geo\Nation	2026-04-16_363943c130a22287de4944938ebc5df1_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-745935970-1373868228-562466063-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4516	WINWORD.exe
468	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-1-5-21-745935970-1373868228-562466063-1000\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	2026-04-16_363943c130a22287de4944938ebc5df1_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
1208	cmd.exe
4080	PING.EXE
4864	PING.EXE
4332	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4080	PING.EXE
4864	PING.EXE
4332	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 4516	2152	2026-04-16_363943c130a22287de4944938ebc5df1_elex_wannacry.exe	86
PID 4516 wrote to memory of 1208	4516	WINWORD.exe	87
PID 1208 wrote to memory of 4080	1208	cmd.exe	89
PID 1208 wrote to memory of 4864	1208	cmd.exe	90
PID 1208 wrote to memory of 4332	1208	cmd.exe	91
PID 1208 wrote to memory of 468	1208	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-04-16_363943c130a22287de4944938ebc5df1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_363943c130a22287de4944938ebc5df1_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2152
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4516
- - 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\00003B33" 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:1208
  - - 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:4080
  - - 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:4864
  - - 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:4332
  - - 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:468

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

Query Registry

T1012

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

00003B33

Path C:\Users\Admin\AppData\Roaming\Mozilla\00003B33
Size 68KB
SHA256 3a3e34ef632a491ce39a58acc0cda446ce7195fa0cc8e9f58e6b3bed46c7802a
MD5 787d8d023c334151ec1b748739aa30b9
SHA1 d4cafc258ec9145a44da6c0f1a184813177dac8a
SHA512 cd00335dea43d525a475329292400cb1c47155b3d08e3c7508ae4962dd4d5603642b37d5b495a1df2de8f2bd5cccaad43d14423d0dcbb878ca064910bf803a5c
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpP:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpP
TLSH
T1DF63A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D138FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 68KB
SHA256 116e492159d2bb191ce58e82aa6d91ba074b2d189e4a4e7dd22efe05546ef43b
MD5 363943c130a22287de4944938ebc5df1
SHA1 2feded048e9c5b9fd59d76c44a0df1177f372373
SHA512 fe57b1790218df7a532b48796acb65e11801cb83ca71ac6f724f6f449491d81300b2622f2f89158e9227e5e9a666a3598ea26c503da6612afb50edf680501f3b
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpf:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpf
TLSH
T17663A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D138FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/468-19-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/468-21-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/468-20-0x0000000000890000-0x0000000000E43000-memory.dmp

Download

memory/2152-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/2152-12-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/2152-11-0x00000000007B0000-0x0000000000D63000-memory.dmp

Download

memory/4516-16-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/4516-15-0x00000000008C0000-0x0000000000E73000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads