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
behavioral1/files/0x002c00000001b679-3.dat	family_juko
behavioral1/files/0x000b0000000241cd-12.dat	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2101206053-1414382737-268919432-1000\Control Panel\International\Geo\Nation	WINWORD.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2101206053-1414382737-268919432-1000\Control Panel\International\Geo\Nation	2026-10-11_6edffe58da9d3e799a8e647464f4b617_elex_wannacry.exe

Executes dropped EXE 2 IoCs

pid	Process
4620	WINWORD.exe
1632	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-1-5-21-2101206053-1414382737-268919432-1000\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
4120	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
4120	cmd.exe
4112	PING.EXE
4512	PING.EXE
3396	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4112	PING.EXE
4512	PING.EXE
3396	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3524 wrote to memory of 4620	3524	2026-10-11_6edffe58da9d3e799a8e647464f4b617_elex_wannacry.exe	86
PID 4620 wrote to memory of 4120	4620	WINWORD.exe	87
PID 4120 wrote to memory of 4112	4120	cmd.exe	89
PID 4120 wrote to memory of 4512	4120	cmd.exe	90
PID 4120 wrote to memory of 3396	4120	cmd.exe	93
PID 4120 wrote to memory of 1632	4120	cmd.exe	96

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⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3524
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4620
- - 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\00001FE4" 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:4120
  - - 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:4112
  - - 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:4512
  - - 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:3396
  - - 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:1632

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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

00001FE4

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001FE4
Size 50KB
SHA256 30cbd0f93aefdf571b8b147b78adb977f3b4d90beebe388ad1b6b80094fdeac9
MD5 120d539c81bf44cb56e0f5363df30990
SHA1 766030d660174cfcf98b55ca8ddb97fa316292c8
SHA512 f66408b1c03e74cc30ae3d83166bfde7e80634bc15986438b1f462abaa6c1a8a4402584f4b321c89462ed06ef3c7249d15035ab7261e2941615306e7fb416e20
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOh:tLsF2Kerc64sTiX2IV0DpL8SE9nYOh
TLSH
T1FD33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
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