juko | ac9ee15f072b7ea5a39d4830a70f7e9ff903ee2dd35c1d82a26fecc5c6804bff

General

Target
2026-11-09_6e4624c1cf853d89ade032bbdb0375e3_elex_wannacry.exe
Size 36KB
Sample261110-t5ggmaby21
SHA256 ac9ee15f072b7ea5a39d4830a70f7e9ff903ee2dd35c1d82a26fecc5c6804bff
MD5 6e4624c1cf853d89ade032bbdb0375e3
SHA1 4849ba8c1a5caed8b70303921ce54b26de30af71
SHA512 4e58bdb4bbc42373a686c384abdae24ba03f599b65f07b2121e650a8536c7a82d9f7c84374d6f2cba32798085e5bbf2c25dff1d1090ef1972354ba97835530ca
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpN:OLsF2Kerc64sTiX2IV0DhuN
TLSH
T16AF23A1B2AA17052C59320B0FA991F34C57D4DB6116BB066FB417B6928B2D63CF70DCE
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/0x00170000000115bb-3.dat	family_juko
behavioral2/files/0x000f00000001c4e5-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2480	WINWORD.exe
3280	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-1-5-21-1704430598-3087477806-3297458608-1000\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
4680	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.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	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	2026-11-09_6e4624c1cf853d89ade032bbdb0375e3_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

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
2916	PING.EXE
3216	PING.EXE
2640	PING.EXE
4680	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2916	PING.EXE
3216	PING.EXE
2640	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 2480	1092	2026-11-09_6e4624c1cf853d89ade032bbdb0375e3_elex_wannacry.exe	89
PID 2480 wrote to memory of 4680	2480	WINWORD.exe	90
PID 4680 wrote to memory of 2916	4680	cmd.exe	92
PID 4680 wrote to memory of 3216	4680	cmd.exe	93
PID 4680 wrote to memory of 2640	4680	cmd.exe	94
PID 4680 wrote to memory of 3280	4680	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-11-09_6e4624c1cf853d89ade032bbdb0375e3_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-09_6e4624c1cf853d89ade032bbdb0375e3_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1092
- 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:2480
- - 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\00001A77" 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:4680
  - - 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:2916
  - - 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:3216
  - - 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:2640
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:3280

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00001A77

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001A77
Size 36KB
SHA256 44a708ae3005f64aa9e054cbce33febb45684e8810d9e565eff1a42279913892
MD5 12eeef6452db9daa7ed272a5af3f23af
SHA1 9d8770c278c39f5fa4fd00749ba1725cf506fd7d
SHA512 bd0ff6398b67cb9a2cab5c16786a85b579640e407ba80d9a43136775e4c4f9992990797415f2e2e661b8bc8bf7822cdc4596042b884a83aeab3671884e68bf3b
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpH:OLsF2Kerc64sTiX2IV0DhuH
TLSH
T13FF23A1B2AA17052C59320B0FA991F34C57D4DB6116BB066FB417B6928B2D63CF70DCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 36KB
SHA256 ac9ee15f072b7ea5a39d4830a70f7e9ff903ee2dd35c1d82a26fecc5c6804bff
MD5 6e4624c1cf853d89ade032bbdb0375e3
SHA1 4849ba8c1a5caed8b70303921ce54b26de30af71
SHA512 4e58bdb4bbc42373a686c384abdae24ba03f599b65f07b2121e650a8536c7a82d9f7c84374d6f2cba32798085e5bbf2c25dff1d1090ef1972354ba97835530ca
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpN:OLsF2Kerc64sTiX2IV0DhuN
TLSH
T16AF23A1B2AA17052C59320B0FA991F34C57D4DB6116BB066FB417B6928B2D63CF70DCE
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