juko | 13abb218c456c254f0e19a04fc265f529e7ee5ab89ef44b677e409e507fe537f

Analysis

max time kernel
149s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
07/05/2026, 02:41

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-05-07_7d373dfc1474cacc5246b8cf25f91d30_elex_wannacry.exe
Size 49KB
Sample260507-c6fs2sat2j
SHA256 13abb218c456c254f0e19a04fc265f529e7ee5ab89ef44b677e409e507fe537f
MD5 7d373dfc1474cacc5246b8cf25f91d30
SHA1 6ded262468119362309944ca9d6c0b042236a134
SHA512 4cd33b9f32976aaefedcc41db329f346e8fcf39a369e602397ec7ee60f7f9f4bb891bc6e35f748291e8ea1f429c3f4a1339d1c0c50851a7e9f1dc4bd8bad7817
SSDEEP 1536:4LsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2/:4Ly2Kerc64CiGImVu8p4kojWh2/
TLSH
T128334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
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/4536-0-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x000a00000002a117-5.dat	family_juko
behavioral2/memory/4536-13-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/1156-16-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b3f7-17.dat	family_juko
behavioral2/memory/5912-19-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/5912-21-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1156	WINWORD.exe
5912	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-1-5-21-1456842261-3464001825-2855069093-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-07_7d373dfc1474cacc5246b8cf25f91d30_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.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
5088	PING.EXE
3864	PING.EXE
5036	cmd.exe
5008	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5008	PING.EXE
5088	PING.EXE
3864	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 1156	4536	2026-05-07_7d373dfc1474cacc5246b8cf25f91d30_elex_wannacry.exe	78
PID 1156 wrote to memory of 5036	1156	WINWORD.exe	79
PID 5036 wrote to memory of 5008	5036	cmd.exe	81
PID 5036 wrote to memory of 5088	5036	cmd.exe	82
PID 5036 wrote to memory of 3864	5036	cmd.exe	83
PID 5036 wrote to memory of 5912	5036	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-07_7d373dfc1474cacc5246b8cf25f91d30_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-07_7d373dfc1474cacc5246b8cf25f91d30_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4536
- 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:1156
- - 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\00007C04" 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:5036
  - - 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:5008
  - - 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:5088
  - - 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:3864
  - - 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:5912

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

00007C04

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007C04
Size 49KB
SHA256 9fc3e9075163ae51f1f374d5e904f42a77cb07366d62bf57b163c350fa5f5abf
MD5 94d52003080f7088fd7ccb0cf780a3d5
SHA1 6a444615e3f0511b13ffcfdc0ee11d5351531023
SHA512 0434c096719bd8dd77218a3591ee68e11ac377bcdb592bb9fa7058c72a0c742424d8318db68142ccdd776d0f9cf8a76e5c7b81843e1e986093883cb2d5ed6f76
SSDEEP 1536:4LsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2n:4Ly2Kerc64CiGImVu8p4kojWh2n
TLSH
T1C9334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 49KB
SHA256 13abb218c456c254f0e19a04fc265f529e7ee5ab89ef44b677e409e507fe537f
MD5 7d373dfc1474cacc5246b8cf25f91d30
SHA1 6ded262468119362309944ca9d6c0b042236a134
SHA512 4cd33b9f32976aaefedcc41db329f346e8fcf39a369e602397ec7ee60f7f9f4bb891bc6e35f748291e8ea1f429c3f4a1339d1c0c50851a7e9f1dc4bd8bad7817
SSDEEP 1536:4LsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2/:4Ly2Kerc64CiGImVu8p4kojWh2/
TLSH
T128334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1156-16-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/1156-15-0x00000000008B0000-0x000000000092A000-memory.dmp

Download

memory/4536-0-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/4536-13-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/4536-12-0x00000000009B0000-0x0000000000A2A000-memory.dmp

Download

memory/5912-19-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5912-20-0x0000000000830000-0x00000000008AA000-memory.dmp

Download

memory/5912-21-0x0000000000400000-0x0000000000420000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads