juko | f96fbb6118fc4c78a5ae2931b6ff69930fe2e71aca740494c995c831329ee2a8

General

Target
2026-07-13_e5f84fc918a45dbe200e34429f972a54_elex_wannacry.exe
Size 30KB
Sample260714-ashdlsdv8v
SHA256 f96fbb6118fc4c78a5ae2931b6ff69930fe2e71aca740494c995c831329ee2a8
MD5 e5f84fc918a45dbe200e34429f972a54
SHA1 fc082f19e8a0a8a7c9aee577510f378969ed3cf0
SHA512 7d6616b2a5dcd6ecb235985a569389bbbcce5d2794a994ff1a6f63d766bcee58b667434def3b11d80e3dea1c0bb8dfed2869826aa6cadd5e474219c07aa0ed7a
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHX5:tLsF2Kerc64sTiX2IV0Dzlo5
TLSH
T1FBE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x001400000002431b-4.dat	family_juko
behavioral1/files/0x000900000002451d-9.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-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	2026-07-13_e5f84fc918a45dbe200e34429f972a54_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
1960	WINWORD.exe
840	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-1-5-21-2937465464-4167303362-2236413517-1000\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	2026-07-13_e5f84fc918a45dbe200e34429f972a54_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
2924	PING.EXE
4624	cmd.exe
3816	PING.EXE
3088	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3816	PING.EXE
3088	PING.EXE
2924	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 1960	1928	2026-07-13_e5f84fc918a45dbe200e34429f972a54_elex_wannacry.exe	85
PID 1960 wrote to memory of 4624	1960	WINWORD.exe	86
PID 4624 wrote to memory of 3816	4624	cmd.exe	88
PID 4624 wrote to memory of 3088	4624	cmd.exe	89
PID 4624 wrote to memory of 2924	4624	cmd.exe	92
PID 4624 wrote to memory of 840	4624	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-13_e5f84fc918a45dbe200e34429f972a54_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-13_e5f84fc918a45dbe200e34429f972a54_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1928
- 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:1960
- - 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\00003D30" 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:4624
  - - 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:3816
  - - 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:3088
  - - 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:2924
  - - 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:840

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

00003D30

Path C:\Users\Admin\AppData\Roaming\Mozilla\00003D30
Size 30KB
SHA256 b5fc29c55f9747b7a19b70a200df30f0976d10a8db2ff1a54eab67d10972bc3c
MD5 045fa56a3ba5761dc2a3f78fa55476d5
SHA1 b7fcdd18f17247d49731c500a09dbea84d6759d9
SHA512 5e51e9fd5439a6931114e04507a54966be88f8b9ea663b674b68398535d9f84b2ceeb3ed828d76b95afb432d303994771bb51646646b07a22c2d52c3fa57708b
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXb:tLsF2Kerc64sTiX2IV0Dzlob
TLSH
T112E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 f96fbb6118fc4c78a5ae2931b6ff69930fe2e71aca740494c995c831329ee2a8
MD5 e5f84fc918a45dbe200e34429f972a54
SHA1 fc082f19e8a0a8a7c9aee577510f378969ed3cf0
SHA512 7d6616b2a5dcd6ecb235985a569389bbbcce5d2794a994ff1a6f63d766bcee58b667434def3b11d80e3dea1c0bb8dfed2869826aa6cadd5e474219c07aa0ed7a
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHX5:tLsF2Kerc64sTiX2IV0Dzlo5
TLSH
T1FBE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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