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
behavioral2/files/0x000c00000001b315-4.dat	family_juko
behavioral2/files/0x000f00000001c54d-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5104	WINWORD.exe
4436	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-1-5-21-1875162379-3804078649-638427191-1000\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	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
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

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
2640	cmd.exe
2988	PING.EXE
708	PING.EXE
1084	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2988	PING.EXE
708	PING.EXE
1084	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 952 wrote to memory of 5104	952	2026-07-13_e5f84fc918a45dbe200e34429f972a54_elex_wannacry.exe	87
PID 5104 wrote to memory of 2640	5104	WINWORD.exe	88
PID 2640 wrote to memory of 2988	2640	cmd.exe	90
PID 2640 wrote to memory of 708	2640	cmd.exe	91
PID 2640 wrote to memory of 1084	2640	cmd.exe	92
PID 2640 wrote to memory of 4436	2640	cmd.exe	93

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⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:952
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5104
- - 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\00005B66" 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:2640
  - - 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:2988
  - - 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:708
  - - 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:1084
  - - 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:4436

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

Remote System Discovery

1

T1018

System Information Discovery

1

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

00005B66

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005B66
Size 30KB
SHA256 5013e31b0a98961e5a92a0bf4c7c92fbb23bba221ce031469f7833e3681d5cbf
MD5 d480bf264b7ac687b2d09789f02b6338
SHA1 dff487b6fe632575773f64737f83b3e67d0393df
SHA512 0ceab64612a1c3ff619acfe2c0bd9286f9e34ace2f60b4102bc61c549d5673512ee9295370cf974228f86ac459c9333dcfdfd32aa91e40c970d98bc4e54775fd
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXL:tLsF2Kerc64sTiX2IV0DzloL
TLSH
T1B7E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

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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