juko | bebc460001d79dcf1761c4ca4144061fc7fae3f12861f1e75ab773a0a9a6d70d

General

Target
2026-10-07_ff6fefd23b7291dd32fb592ee74d15e1_elex_wannacry.exe
Size 105KB
Sample261007-3rf4daxvgs
SHA256 bebc460001d79dcf1761c4ca4144061fc7fae3f12861f1e75ab773a0a9a6d70d
MD5 ff6fefd23b7291dd32fb592ee74d15e1
SHA1 3fc8874bac5283d27514283e00ff8627a9bfb6a3
SHA512 ac87107979b8c3bb276734a050481b21750a2b7c8d2e620764fa3534875cfe22a66d3c218479620051d5690fc1f435b4c26976738e71e9f16d21f795bc97f7ce
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFP:XLsF2Kerc64sTiX2IV0DpKP
TLSH
T1BCB32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
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/0x000a00000001b302-3.dat	family_juko
behavioral2/files/0x001100000001c4e5-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
804	WINWORD.exe
5188	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-1-5-21-696679853-3915825385-3233721679-1000\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
3000	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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-07_ff6fefd23b7291dd32fb592ee74d15e1_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

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
3000	cmd.exe
6064	PING.EXE
4728	PING.EXE
2412	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2412	PING.EXE
6064	PING.EXE
4728	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 804	1792	2026-10-07_ff6fefd23b7291dd32fb592ee74d15e1_elex_wannacry.exe	89
PID 804 wrote to memory of 3000	804	WINWORD.exe	90
PID 3000 wrote to memory of 6064	3000	cmd.exe	92
PID 3000 wrote to memory of 4728	3000	cmd.exe	93
PID 3000 wrote to memory of 2412	3000	cmd.exe	94
PID 3000 wrote to memory of 5188	3000	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-07_ff6fefd23b7291dd32fb592ee74d15e1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-07_ff6fefd23b7291dd32fb592ee74d15e1_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1792
- 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:804
- - 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\00006984" 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:3000
  - - 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:6064
  - - 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:4728
  - - 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:2412
  - - 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:5188

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

00006984

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006984
Size 105KB
SHA256 a7ba4bb066735548bc6cf72a83fa87bcb851748593c1a0d151fd2d2b1daf9c77
MD5 210fd1348a02274e3d248582f86d2758
SHA1 ee5d6433c5c9d537bd217fbf6bc1ed1ad9203cf1
SHA512 bb996c3edcb7690d3dc5a7485f72ff9e02b53c983254b761f86f462ab9eef5918a31a2f32703a87b5b5b31fec5aaf0daf4a33345adc0845350a6a63c690b9946
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFT:XLsF2Kerc64sTiX2IV0DpKT
TLSH
T1CCB32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 105KB
SHA256 bebc460001d79dcf1761c4ca4144061fc7fae3f12861f1e75ab773a0a9a6d70d
MD5 ff6fefd23b7291dd32fb592ee74d15e1
SHA1 3fc8874bac5283d27514283e00ff8627a9bfb6a3
SHA512 ac87107979b8c3bb276734a050481b21750a2b7c8d2e620764fa3534875cfe22a66d3c218479620051d5690fc1f435b4c26976738e71e9f16d21f795bc97f7ce
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFP:XLsF2Kerc64sTiX2IV0DpKP
TLSH
T1BCB32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
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