juko | 60ebe7ad52eb040a584e9bce0e370d4b9ac6879b6cc7eaf0ce442e23ecf3bd44

General

Target
2026-08-16_a0125bc55b800bc64ca4ab4808bd4ca2_elex_wannacry.exe
Size 32KB
Sample260816-vtmpyafj3z
SHA256 60ebe7ad52eb040a584e9bce0e370d4b9ac6879b6cc7eaf0ce442e23ecf3bd44
MD5 a0125bc55b800bc64ca4ab4808bd4ca2
SHA1 88125d9670c91e71c25da4b98c82b7f0ea0e5433
SHA512 2f491a4f1eb660253affdcb6a98e1ef408bf8228136ebaea41d46994c5a5e3c2b44771512f7ef0854b909777a3d0db587ac3c71bdbefed05d0ce01fb178b2634
SSDEEP 768:RZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqbNPWQHJne:bLsF2Kerc64sTiX2IV0DEane
TLSH
T16CE22A2B2AA57052C59320B0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution juko persistence trojan

Malware Config

Signatures

Family: Juko
Juko is a trojan written in C++.
trojan juko

Detects Juko 2 IoCs

resource	yara_rule
behavioral2/files/0x000e00000001b1d0-4.dat	family_juko
behavioral2/files/0x000f00000001c554-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3216	WINWORD.exe
5360	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-1-5-21-1738198120-2966725515-3980530802-1000\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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
704	cmd.exe

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	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	2026-08-16_a0125bc55b800bc64ca4ab4808bd4ca2_elex_wannacry.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
4568	PING.EXE
704	cmd.exe
2468	PING.EXE
1524	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2468	PING.EXE
1524	PING.EXE
4568	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4756 wrote to memory of 3216	4756	2026-08-16_a0125bc55b800bc64ca4ab4808bd4ca2_elex_wannacry.exe	89
PID 3216 wrote to memory of 704	3216	WINWORD.exe	90
PID 704 wrote to memory of 2468	704	cmd.exe	92
PID 704 wrote to memory of 1524	704	cmd.exe	93
PID 704 wrote to memory of 4568	704	cmd.exe	94
PID 704 wrote to memory of 5360	704	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-16_a0125bc55b800bc64ca4ab4808bd4ca2_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-16_a0125bc55b800bc64ca4ab4808bd4ca2_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4756
- 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:3216
- - 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\00005BAE" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:704
  - - 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:2468
  - - 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:1524
  - - 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:4568
  - - 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:5360

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00005BAE

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005BAE
Size 32KB
SHA256 9199afc647b59e662941e998629711a3de668e67f25c3943c3197f52eb0d70d6
MD5 d2e043b39bd97d640bafd699f4756dc6
SHA1 107a511077a4100c4f9e9a9cfb76a3a787c694b7
SHA512 d5cefd6765c1241bc22865de952acc33539186c3ed98825a465bab86cc99a788184db911ac879de34b35b6944557daa40a76619dc9fbed060e115736d70acaef
SSDEEP 768:RZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqbNPWQHJne:bLsF2Kerc64sTiX2IV0DEane
TLSH
T1CFE22B2B2AA57052C59320B0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 60ebe7ad52eb040a584e9bce0e370d4b9ac6879b6cc7eaf0ce442e23ecf3bd44
MD5 a0125bc55b800bc64ca4ab4808bd4ca2
SHA1 88125d9670c91e71c25da4b98c82b7f0ea0e5433
SHA512 2f491a4f1eb660253affdcb6a98e1ef408bf8228136ebaea41d46994c5a5e3c2b44771512f7ef0854b909777a3d0db587ac3c71bdbefed05d0ce01fb178b2634
SSDEEP 768:RZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqbNPWQHJne:bLsF2Kerc64sTiX2IV0DEane
TLSH
T16CE22A2B2AA57052C59320B0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads