juko | 0bd23ed1e21fc36310532261fbbb6bcd1489c0c3b23d359499ead7d97d395ce4

General

Target
2026-04-19_156eb15ffdcbc428a6c5480dc3ae0f27_elex_wannacry.exe
Size 42KB
Sample260419-p74bysf14t
SHA256 0bd23ed1e21fc36310532261fbbb6bcd1489c0c3b23d359499ead7d97d395ce4
MD5 156eb15ffdcbc428a6c5480dc3ae0f27
SHA1 2e64b6da8616418066335fb652feda22aa243c69
SHA512 e7a2c8a55bc718a232bed0a33e72a2bdcb5ba1dfb076aa65ea1e5ccffc791f00d278745cafaed21f2e906893879f7e3ff4ab17363d864bf7e1f4d88b255fe33d
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41m:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+x
TLSH
T17013171776A460D2CDB76074E91A4E30437E9CF664A7B317A72076202DB3D5ACFA02CE
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 2 IoCs

resource	yara_rule
behavioral2/files/0x002d00000002b1ab-4.dat	family_juko
behavioral2/files/0x001c00000002b2b1-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
8	WINWORD.exe
2876	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-1-5-21-3847269522-1618051987-1942096715-1000\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	2026-04-19_156eb15ffdcbc428a6c5480dc3ae0f27_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
3496	cmd.exe
3096	PING.EXE
2648	PING.EXE
5040	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3096	PING.EXE
2648	PING.EXE
5040	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4964 wrote to memory of 8	4964	2026-04-19_156eb15ffdcbc428a6c5480dc3ae0f27_elex_wannacry.exe	80
PID 8 wrote to memory of 3496	8	WINWORD.exe	81
PID 3496 wrote to memory of 3096	3496	cmd.exe	83
PID 3496 wrote to memory of 2648	3496	cmd.exe	84
PID 3496 wrote to memory of 5040	3496	cmd.exe	85
PID 3496 wrote to memory of 2876	3496	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-19_156eb15ffdcbc428a6c5480dc3ae0f27_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-19_156eb15ffdcbc428a6c5480dc3ae0f27_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4964
- 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:8
- - 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\00001B1A" 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:3496
  - - 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:3096
  - - 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:2648
  - - 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:5040
  - - 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:2876

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

00001B1A

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001B1A
Size 42KB
SHA256 41829e634a7060067e198e70fa23e497669d1232786828010de45ab76933d538
MD5 57aa1514582b6d8d227661d41b7efe79
SHA1 0d4fb1bb4d8ac8a5940e95da1e0840d2a04799f9
SHA512 627fd86852007fae6f7b4bee7ed6c75464b401534b6c4f2ec2de4da9f06b93703b21c94f6cafc86f4e0eb137412275caf5deaf1e58de3e29d96411b40eff6c88
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41O:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+V
TLSH
T1AC13171776A460D2CDB76074E91A4E30437E9CF664A7B317A72076202DB3D5ACFA02CE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 42KB
SHA256 0bd23ed1e21fc36310532261fbbb6bcd1489c0c3b23d359499ead7d97d395ce4
MD5 156eb15ffdcbc428a6c5480dc3ae0f27
SHA1 2e64b6da8616418066335fb652feda22aa243c69
SHA512 e7a2c8a55bc718a232bed0a33e72a2bdcb5ba1dfb076aa65ea1e5ccffc791f00d278745cafaed21f2e906893879f7e3ff4ab17363d864bf7e1f4d88b255fe33d
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41m:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+x
TLSH
T17013171776A460D2CDB76074E91A4E30437E9CF664A7B317A72076202DB3D5ACFA02CE
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