juko | 720d2535f440fd2a3f12c202a66bcc392d4e0df62118b616d2e74f494761e3cb

General

Target
2026-08-02_7271d0772b519c18a4227a53b0a1ef54_elex_wannacry.exe
Size 32KB
Sample260802-1h82pasdmb
SHA256 720d2535f440fd2a3f12c202a66bcc392d4e0df62118b616d2e74f494761e3cb
MD5 7271d0772b519c18a4227a53b0a1ef54
SHA1 1c0d051de9a4fc75edd1489d31e3ea3dbba042a9
SHA512 ee2e8c05964ed9a34ec3f89cb8aab296998808a066f1e90b673d4a89b7c48965ea258964f6a0f8c65a147046c3c7cd70ce837f20926552246fd464e52e965134
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHlq:OLsF2Kerc64sTiX2IV0Dpmq
TLSH
T112E2192B2AA17052C59220B0F9591F34C43D5DB50F6BB062F74D7A6928B2D63CF71ACE
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/0x001700000002431a-4.dat	family_juko
behavioral1/files/0x00080000000243c7-12.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	2026-08-02_7271d0772b519c18a4227a53b0a1ef54_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
5016	WINWORD.exe
3764	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
1084	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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-02_7271d0772b519c18a4227a53b0a1ef54_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

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
1084	cmd.exe
4604	PING.EXE
2940	PING.EXE
4876	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4604	PING.EXE
2940	PING.EXE
4876	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 5016	2004	2026-08-02_7271d0772b519c18a4227a53b0a1ef54_elex_wannacry.exe	86
PID 5016 wrote to memory of 1084	5016	WINWORD.exe	87
PID 1084 wrote to memory of 4604	1084	cmd.exe	89
PID 1084 wrote to memory of 2940	1084	cmd.exe	90
PID 1084 wrote to memory of 4876	1084	cmd.exe	92
PID 1084 wrote to memory of 3764	1084	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-02_7271d0772b519c18a4227a53b0a1ef54_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_7271d0772b519c18a4227a53b0a1ef54_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2004
- 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:5016
- - 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\00007193" 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:1084
  - - 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:4604
  - - 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:2940
  - - 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:4876
  - - 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:3764

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

00007193

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007193
Size 32KB
SHA256 87966334a506f6e174fef477bc48c9451cf94f8623a4fbeb9501464bb26fcb2f
MD5 090c4814e5b419b15f8a1eccf154720e
SHA1 29acff1bb37150468201730b2b2a4a7c6b372f8e
SHA512 486196871ef8f8faef3d65937fbf0bef7896676a7e9f21b16618ed97995e5ee156b5489cbdd8c55af4feb13953e0036244623837aa7eb765136dc603d67c9d0e
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHl6:OLsF2Kerc64sTiX2IV0Dpm6
TLSH
T15EE2192B2AA17052C59220B0F9591F34C43D5DB50F6BB062F74D7A6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 720d2535f440fd2a3f12c202a66bcc392d4e0df62118b616d2e74f494761e3cb
MD5 7271d0772b519c18a4227a53b0a1ef54
SHA1 1c0d051de9a4fc75edd1489d31e3ea3dbba042a9
SHA512 ee2e8c05964ed9a34ec3f89cb8aab296998808a066f1e90b673d4a89b7c48965ea258964f6a0f8c65a147046c3c7cd70ce837f20926552246fd464e52e965134
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHlq:OLsF2Kerc64sTiX2IV0Dpmq
TLSH
T112E2192B2AA17052C59220B0F9591F34C43D5DB50F6BB062F74D7A6928B2D63CF71ACE
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