juko | f7711be296901f4e3cc69327c9a332c5c07622c643072c7b2648324844da7ec7

General

Target
2026-05-04_6a054173b804270858f4a643d54ef25d_elex_wannacry.exe
Size 105KB
Sample260504-ea158afw2l
SHA256 f7711be296901f4e3cc69327c9a332c5c07622c643072c7b2648324844da7ec7
MD5 6a054173b804270858f4a643d54ef25d
SHA1 3a8cbd4d7515317fa2261a9c65d1488d2c4f22cc
SHA512 5c90dec8710e7a31c0b04c2e4fcc78f5b217d3aaf3c5b897ae78374b9de0f8530fb73609611f7f92948aba1734a279de967ef8ca6082b35101afca590972d54d
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFV:XLsF2Kerc64sTiX2IV0DpKV
TLSH
T139B32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
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/0x001b00000002b4f3-4.dat	family_juko
behavioral2/files/0x001b00000002b4fa-14.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3844	WINWORD.exe
3088	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-1-5-21-2122505878-652277452-2375749442-1000\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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-04_6a054173b804270858f4a643d54ef25d_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
4532	PING.EXE
2424	PING.EXE
4668	PING.EXE
4088	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4668	PING.EXE
4532	PING.EXE
2424	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4884 wrote to memory of 3844	4884	2026-05-04_6a054173b804270858f4a643d54ef25d_elex_wannacry.exe	80
PID 3844 wrote to memory of 4088	3844	WINWORD.exe	81
PID 4088 wrote to memory of 4532	4088	cmd.exe	83
PID 4088 wrote to memory of 2424	4088	cmd.exe	84
PID 4088 wrote to memory of 4668	4088	cmd.exe	85
PID 4088 wrote to memory of 3088	4088	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-04_6a054173b804270858f4a643d54ef25d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-04_6a054173b804270858f4a643d54ef25d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4884
- 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:3844
- - 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\00000AB8" 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:4088
  - - 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:4532
  - - 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:2424
  - - 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:4668
  - - 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:3088

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

00000AB8

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000AB8
Size 105KB
SHA256 c4a0a7892cf1fcabe30510fdaf72d92e3849f7bfbbdf455dc0fd70e399617538
MD5 9431f31c677fe40818251cbb1d86baa3
SHA1 3abd0eddd6c3ed55e7914344f5f3273340fb896d
SHA512 a79418c9365906248c896f0cbf6a9c4e8e560dc5b4fc8f827aa9940700245c075740aa66e5a36898bbaff65868f10100a694f29155cc608831dcfe3b2dd8a2ae
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFF:XLsF2Kerc64sTiX2IV0DpKF
TLSH
T1C9B32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 105KB
SHA256 f7711be296901f4e3cc69327c9a332c5c07622c643072c7b2648324844da7ec7
MD5 6a054173b804270858f4a643d54ef25d
SHA1 3a8cbd4d7515317fa2261a9c65d1488d2c4f22cc
SHA512 5c90dec8710e7a31c0b04c2e4fcc78f5b217d3aaf3c5b897ae78374b9de0f8530fb73609611f7f92948aba1734a279de967ef8ca6082b35101afca590972d54d
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFV:XLsF2Kerc64sTiX2IV0DpKV
TLSH
T139B32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3088-16-0x0000000002B30000-0x0000000002B37000-memory.dmp

Download

memory/3088-17-0x0000000002C90000-0x0000000002D2C000-memory.dmp

Download

memory/3088-21-0x0000000002C90000-0x0000000002D2C000-memory.dmp

Download

memory/3844-13-0x00000000025B0000-0x000000000264C000-memory.dmp

Download

memory/4884-10-0x0000000002670000-0x000000000270C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads