juko | 45134cc104170a2c20ec0a8d94f180607bcae02da688a4cb91dd19fa8e509284

General

Target
2026-08-09_dee60fa50524a179c50e04567d6c05d2_elex_wannacry.exe
Size 50KB
Sample260809-elc8jattcw
SHA256 45134cc104170a2c20ec0a8d94f180607bcae02da688a4cb91dd19fa8e509284
MD5 dee60fa50524a179c50e04567d6c05d2
SHA1 b8a54cce9fe8efbf631906274b377fbd627f2167
SHA512 4964ce7d1a2d2a99d901378a13b57e6d901199fa87689e089dce33b9ec3610d2c26ea87e095666b938faf387094e58b68a6005564573cfc4606b963828967e63
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOw:tLsF2Kerc64sTiX2IV0DpL8SE9nYOw
TLSH
T1D633291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
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/0x001f000000016810-4.dat	family_juko
behavioral1/files/0x000400000001e6a2-12.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-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	2026-08-09_dee60fa50524a179c50e04567d6c05d2_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4724	WINWORD.exe
3376	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-1-5-21-204488895-2999877624-296153668-1000\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
2000	cmd.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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-09_dee60fa50524a179c50e04567d6c05d2_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

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
2000	cmd.exe
712	PING.EXE
3064	PING.EXE
2056	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
712	PING.EXE
3064	PING.EXE
2056	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3436 wrote to memory of 4724	3436	2026-08-09_dee60fa50524a179c50e04567d6c05d2_elex_wannacry.exe	87
PID 4724 wrote to memory of 2000	4724	WINWORD.exe	89
PID 2000 wrote to memory of 712	2000	cmd.exe	91
PID 2000 wrote to memory of 3064	2000	cmd.exe	93
PID 2000 wrote to memory of 2056	2000	cmd.exe	94
PID 2000 wrote to memory of 3376	2000	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-09_dee60fa50524a179c50e04567d6c05d2_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_dee60fa50524a179c50e04567d6c05d2_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3436
- 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:4724
- - 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\00001FD8" 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:2000
  - - 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:712
  - - 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:3064
  - - 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:2056
  - - 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:3376

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00001FD8

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001FD8
Size 50KB
SHA256 238d2e36a476c4b2a422f1cebccd1fcdc0d57ef4de3b14e22e3b5907aabc2f9f
MD5 ccd2587198646a5c4faa901076ad5683
SHA1 212b82dd840628aef72933854d4bbbda22730f1e
SHA512 f29612657359a343f0843c7c7c467cb508637a64ee25c02adb9484b6e2f7422c5e7a6f51efa814d8b02abf90ed33e51f158f43e3df0ee3f14027224b8b7a6cc7
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOr:tLsF2Kerc64sTiX2IV0DpL8SE9nYOr
TLSH
T13D33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 45134cc104170a2c20ec0a8d94f180607bcae02da688a4cb91dd19fa8e509284
MD5 dee60fa50524a179c50e04567d6c05d2
SHA1 b8a54cce9fe8efbf631906274b377fbd627f2167
SHA512 4964ce7d1a2d2a99d901378a13b57e6d901199fa87689e089dce33b9ec3610d2c26ea87e095666b938faf387094e58b68a6005564573cfc4606b963828967e63
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOw:tLsF2Kerc64sTiX2IV0DpL8SE9nYOw
TLSH
T1D633291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
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