juko | 830e68937e90afc51a3ec2e8bdce7d34665c8ac0e8bc0edff44ba4d2764f7bd6

General

Target
2026-06-05_5d9eab02bab088faaf55df9ade25c06f_elex_wannacry.exe
Size 30KB
Sample260605-byeeksas5z
SHA256 830e68937e90afc51a3ec2e8bdce7d34665c8ac0e8bc0edff44ba4d2764f7bd6
MD5 5d9eab02bab088faaf55df9ade25c06f
SHA1 64dc824420011dc3f4943fd00bc23cc77cf722d5
SHA512 f691491953b16dd13f756f6d12b71b0bd442cffbd8ea0996a15c4c204a22246167a5d6bdc4044b5ef42f7a258075e173bbfda974bc464536ace5b90088cb0e9c
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHX3:tLsF2Kerc64sTiX2IV0Dzlo3
TLSH
T1BFE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x000c000000028ec9-4.dat	family_juko
behavioral2/files/0x001900000002b86a-9.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1176	WINWORD.exe
2032	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-1-5-21-1768642833-2142038154-4041560723-1000\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	2026-06-05_5d9eab02bab088faaf55df9ade25c06f_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
3500	cmd.exe
2364	PING.EXE
5144	PING.EXE
5204	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5204	PING.EXE
2364	PING.EXE
5144	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5116 wrote to memory of 1176	5116	2026-06-05_5d9eab02bab088faaf55df9ade25c06f_elex_wannacry.exe	82
PID 1176 wrote to memory of 3500	1176	WINWORD.exe	83
PID 3500 wrote to memory of 2364	3500	cmd.exe	85
PID 3500 wrote to memory of 5144	3500	cmd.exe	86
PID 3500 wrote to memory of 5204	3500	cmd.exe	87
PID 3500 wrote to memory of 2032	3500	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-06-05_5d9eab02bab088faaf55df9ade25c06f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-05_5d9eab02bab088faaf55df9ade25c06f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5116
- 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:1176
- - 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\00002FD6" 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:3500
  - - 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:2364
  - - 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:5144
  - - 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:5204
  - - 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:2032

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

00002FD6

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002FD6
Size 30KB
SHA256 3392c5bc60c089251b3757a97e8d32b859daef211409cad316aa9918aae766f9
MD5 2f05932785e06d89d39541f89c23a4b9
SHA1 0fc18b8b3104f876255d4925f24e9450d01aaba7
SHA512 addeda4f5caf65f28246d2bb0b4fec36d624137ff9528a0ac49e5c8248c41f8680623b13075a8cd8b7758cadb0b924fbd18009612ffae810396d274ff76a5c17
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXC:tLsF2Kerc64sTiX2IV0DzloC
TLSH
T18DE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 830e68937e90afc51a3ec2e8bdce7d34665c8ac0e8bc0edff44ba4d2764f7bd6
MD5 5d9eab02bab088faaf55df9ade25c06f
SHA1 64dc824420011dc3f4943fd00bc23cc77cf722d5
SHA512 f691491953b16dd13f756f6d12b71b0bd442cffbd8ea0996a15c4c204a22246167a5d6bdc4044b5ef42f7a258075e173bbfda974bc464536ace5b90088cb0e9c
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHX3:tLsF2Kerc64sTiX2IV0Dzlo3
TLSH
T1BFE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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