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
behavioral1/files/0x000b0000000242a5-4.dat	family_juko
behavioral1/files/0x0009000000024471-12.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-1-5-21-745935970-1373868228-562466063-1000\Control Panel\International\Geo\Nation	2026-05-04_6a054173b804270858f4a643d54ef25d_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-745935970-1373868228-562466063-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
3624	WINWORD.exe
3200	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-1-5-21-745935970-1373868228-562466063-1000\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	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	2026-05-04_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

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
3532	cmd.exe
60	PING.EXE
5028	PING.EXE
1656	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
60	PING.EXE
5028	PING.EXE
1656	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 3624	4440	2026-05-04_6a054173b804270858f4a643d54ef25d_elex_wannacry.exe	86
PID 3624 wrote to memory of 3532	3624	WINWORD.exe	87
PID 3532 wrote to memory of 60	3532	cmd.exe	89
PID 3532 wrote to memory of 5028	3532	cmd.exe	90
PID 3532 wrote to memory of 1656	3532	cmd.exe	91
PID 3532 wrote to memory of 3200	3532	cmd.exe	92

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⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4440
- 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:3624
- - 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\00001F0E" 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:3532
  - - 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:60
  - - 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:5028
  - - 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:1656
  - - 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:3200

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

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

00001F0E

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001F0E
Size 105KB
SHA256 01d5051aba74b5c16da35aaf92151cc3ca6a778ee7810ffdb23aacc3589b0ff5
MD5 1a222a7d842bfe86934980d1262c1c37
SHA1 8fab81f3f835225829b3ce6e18f73308d5041b6f
SHA512 d98e69dc6c50dc707dd0554d55fa27412f3c5797ac0f0ad73bc59026b4082a964b6f6a8744ac1ff5fcaeaddd6e6cb8da157aaece95920c4b3248cf4509f9d487
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFF:XLsF2Kerc64sTiX2IV0DpKF
TLSH
T161B32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads