juko | ee08848bf8586ba9b4c504800d3151756bc64f7f493678e7c78f12e76788e76e

General

Target
2026-10-13_e9fad7217d85d55bc6ad195953dac642_elex_wannacry.exe
Size 53KB
Sample261014-cy85maeb74
SHA256 ee08848bf8586ba9b4c504800d3151756bc64f7f493678e7c78f12e76788e76e
MD5 e9fad7217d85d55bc6ad195953dac642
SHA1 49cf67be969a31f251895b516b65ec63ffaad731
SHA512 36f5a7ec9f06bc06d3db34466eb61e8ad0e7e203f4f687e0c3c797e51d3539da4e6498487c598ec9bda150133fabb01ba5725fa1c95da4a2e843bbb76402cb16
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2O:3Ly2Kerc64CiGIm1tcBMUOOFO
TLSH
T180335C176A559056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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/0x000d00000001b8b0-3.dat	family_juko
behavioral2/files/0x000d00000001c641-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4808	WINWORD.exe
4824	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-1-5-21-1262770251-41185387-1005173349-1000\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
2996	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	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	2026-10-13_e9fad7217d85d55bc6ad195953dac642_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
2996	cmd.exe
4432	PING.EXE
3772	PING.EXE
4460	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3772	PING.EXE
4460	PING.EXE
4432	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4200 wrote to memory of 4808	4200	2026-10-13_e9fad7217d85d55bc6ad195953dac642_elex_wannacry.exe	89
PID 4808 wrote to memory of 2996	4808	WINWORD.exe	90
PID 2996 wrote to memory of 4432	2996	cmd.exe	92
PID 2996 wrote to memory of 3772	2996	cmd.exe	93
PID 2996 wrote to memory of 4460	2996	cmd.exe	94
PID 2996 wrote to memory of 4824	2996	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-13_e9fad7217d85d55bc6ad195953dac642_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-13_e9fad7217d85d55bc6ad195953dac642_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4200
- 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:4808
- - 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\000069DF" 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:2996
  - - 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:4432
  - - 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:3772
  - - 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:4460
  - - 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:4824

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

000069DF

Path C:\Users\Admin\AppData\Roaming\Mozilla\000069DF
Size 53KB
SHA256 f04d7aa41b1bbda4b9feefe7299b2189a9506e22c0e59086ca36ac003c2dd1c2
MD5 8b191affdcd1eafde77b23890c1021f8
SHA1 a9ce05fcb7e67126afc8b1a1014f6511d4306e96
SHA512 1841aaf6308605b5a7e144516a2c3c74d4bf38c0918fefd5f3e420700fbb457f473c550353c8c11f2c4dc72e2f8cb1cbc5228ad072ccb3d799f8c176be9ae825
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq27:3Ly2Kerc64CiGIm1tcBMUOOF7
TLSH
T1A3335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 53KB
SHA256 ee08848bf8586ba9b4c504800d3151756bc64f7f493678e7c78f12e76788e76e
MD5 e9fad7217d85d55bc6ad195953dac642
SHA1 49cf67be969a31f251895b516b65ec63ffaad731
SHA512 36f5a7ec9f06bc06d3db34466eb61e8ad0e7e203f4f687e0c3c797e51d3539da4e6498487c598ec9bda150133fabb01ba5725fa1c95da4a2e843bbb76402cb16
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2O:3Ly2Kerc64CiGIm1tcBMUOOFO
TLSH
T180335C176A559056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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