juko | e28de5e69376dd35cf19c0f0e174da5203eaf5c0f76b1f14ac2f32774f454a7d

General

Target
2026-10-11_6edffe58da9d3e799a8e647464f4b617_elex_wannacry.exe
Size 50KB
Sample261012-xpv7mady8x
SHA256 e28de5e69376dd35cf19c0f0e174da5203eaf5c0f76b1f14ac2f32774f454a7d
MD5 6edffe58da9d3e799a8e647464f4b617
SHA1 7d232e315654fd078aa74b2758848c8d7ba9dbe7
SHA512 d627bdb380e4bec905e780ae745d8de63869225f949136b500eb3ca7a07ff3fd957d1dbbff26c0021d3c9b91eb77cfe7793d04f0cd1accb6b29dfa10e445eeca
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO2:tLsF2Kerc64sTiX2IV0DpL8SE9nYO2
TLSH
T10B33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E676103BB85B70D1CB2A52CF3298E
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/0x000900000001b84e-3.dat	family_juko
behavioral2/files/0x000e00000001c5c3-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5876	WINWORD.exe
3716	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-1-5-21-560646293-820748483-2532804640-1000\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
4788	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	2026-10-11_6edffe58da9d3e799a8e647464f4b617_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
2724	PING.EXE
2208	PING.EXE
4788	cmd.exe
264	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
264	PING.EXE
2724	PING.EXE
2208	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4168 wrote to memory of 5876	4168	2026-10-11_6edffe58da9d3e799a8e647464f4b617_elex_wannacry.exe	89
PID 5876 wrote to memory of 4788	5876	WINWORD.exe	90
PID 4788 wrote to memory of 264	4788	cmd.exe	92
PID 4788 wrote to memory of 2724	4788	cmd.exe	93
PID 4788 wrote to memory of 2208	4788	cmd.exe	94
PID 4788 wrote to memory of 3716	4788	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-11_6edffe58da9d3e799a8e647464f4b617_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-11_6edffe58da9d3e799a8e647464f4b617_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4168
- 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:5876
- - 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\00005425" 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:4788
  - - 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:264
  - - 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:2724
  - - 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:2208
  - - 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:3716

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

00005425

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005425
Size 50KB
SHA256 e227b448f74aa04e8ed8590a4eca63768ef13893c71c88e1bd626e29a56b49f8
MD5 b5331be73be7f4d6d36df14e614d96af
SHA1 44860e37fc0d1862bf2d0e0935ed7c58929b3954
SHA512 3a7a10e2fd064f622d9e80fd1f9db9d64eed3ce37bf36260fda0babf1feac350898bb27529d6066d136729145187af7dbf8cb9b8a0f4f8f83f47009a56d5e86c
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOJ:tLsF2Kerc64sTiX2IV0DpL8SE9nYOJ
TLSH
T14833291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 e28de5e69376dd35cf19c0f0e174da5203eaf5c0f76b1f14ac2f32774f454a7d
MD5 6edffe58da9d3e799a8e647464f4b617
SHA1 7d232e315654fd078aa74b2758848c8d7ba9dbe7
SHA512 d627bdb380e4bec905e780ae745d8de63869225f949136b500eb3ca7a07ff3fd957d1dbbff26c0021d3c9b91eb77cfe7793d04f0cd1accb6b29dfa10e445eeca
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO2:tLsF2Kerc64sTiX2IV0DpL8SE9nYO2
TLSH
T10B33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E676103BB85B70D1CB2A52CF3298E
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