juko | 1500985eaad9aa7387f399c386b99a33193e70b92d132259b595f67b1afaefad

General

Target
2026-08-25_980c30ce6734937822e384d4b0309543_elex_wannacry.exe
Size 87KB
Sample260826-ty7egasdpg
SHA256 1500985eaad9aa7387f399c386b99a33193e70b92d132259b595f67b1afaefad
MD5 980c30ce6734937822e384d4b0309543
SHA1 2d502a42a31c3afbb4c1915a2d927d9818e4e952
SHA512 4e3048282cd6ad19517c9de9f79861fe9987eaca0f3cd57133515b5853c428eb8353d0f61687f5e3dd275e7e73b21da9c44407eb3abba4e3cb0ac2d954f209b8
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpE:2Ly2Kerc64CiGIm1K851YO6EQkwpE
TLSH
T11893A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
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 7 IoCs

resource	yara_rule
behavioral2/memory/2600-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x000700000001b6c1-5.dat	family_juko
behavioral2/memory/2600-9-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/3196-12-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x001600000001c3eb-13.dat	family_juko
behavioral2/memory/5632-15-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/5632-16-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3196	WINWORD.exe
5632	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-1-5-21-1079202589-886135813-2527035092-1000\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
1204	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-25_980c30ce6734937822e384d4b0309543_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

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
1204	cmd.exe
5828	PING.EXE
5492	PING.EXE
4420	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4420	PING.EXE
5828	PING.EXE
5492	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2600 wrote to memory of 3196	2600	2026-08-25_980c30ce6734937822e384d4b0309543_elex_wannacry.exe	90
PID 3196 wrote to memory of 1204	3196	WINWORD.exe	91
PID 1204 wrote to memory of 5828	1204	cmd.exe	93
PID 1204 wrote to memory of 5492	1204	cmd.exe	94
PID 1204 wrote to memory of 4420	1204	cmd.exe	95
PID 1204 wrote to memory of 5632	1204	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-08-25_980c30ce6734937822e384d4b0309543_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-25_980c30ce6734937822e384d4b0309543_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2600
- 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:3196
- - 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\00000B3C" 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:1204
  - - 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:5828
  - - 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:5492
  - - 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:4420
  - - 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:5632

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:5972

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

00000B3C

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000B3C
Size 87KB
SHA256 70eea2eaf19da0defc6074182200acce37fc7c98d7e6e72eec97d6d142317554
MD5 97a84a339e9172026a955e218f72972e
SHA1 4addf4df7ebb616cff766ab5c692cf857c8bdc23
SHA512 313a0f4341871439b3d86c54eed4dbe3acdb945950b3e7245da1853f27a59a683e4794297191c26d2f348ae1b6b4c4a1c7a6d10b6f60c266d7deef291438d7e6
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpC:2Ly2Kerc64CiGIm1K851YO6EQkwpC
TLSH
T13B93A1763A259190C48BD138E8155AA0B932DCF53FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 87KB
SHA256 1500985eaad9aa7387f399c386b99a33193e70b92d132259b595f67b1afaefad
MD5 980c30ce6734937822e384d4b0309543
SHA1 2d502a42a31c3afbb4c1915a2d927d9818e4e952
SHA512 4e3048282cd6ad19517c9de9f79861fe9987eaca0f3cd57133515b5853c428eb8353d0f61687f5e3dd275e7e73b21da9c44407eb3abba4e3cb0ac2d954f209b8
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpE:2Ly2Kerc64CiGIm1K851YO6EQkwpE
TLSH
T11893A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2600-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/2600-9-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3196-12-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5632-15-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5632-16-0x0000000000400000-0x0000000000425000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads