juko | 13eb3301755eb484fa4ef37e0d8ed65d91f392e53d3f0de9cf35001b6aedcdbc

General

Target
2026-06-02_0bb9dcc128b09e35089eb35224885b33_elex_wannacry.exe
Size 32KB
Sample260602-bkwrpsat41
SHA256 13eb3301755eb484fa4ef37e0d8ed65d91f392e53d3f0de9cf35001b6aedcdbc
MD5 0bb9dcc128b09e35089eb35224885b33
SHA1 905f6f21713505ac94cdf439fcb2c2d7893dab1f
SHA512 04fd75029bbf7bc4293dff30c52a1497dd2e78cafdd7f2056221a97ba4d25b383308c9d19f63c7e2ac9b049bd0b84eb35e66a21f0e2b03f0ba6785e6f4f5b38f
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpZ:OLsF2Kerc64sTiX2IV0DhuZ
TLSH
T104E23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
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/0x000e000000025e21-4.dat	family_juko
behavioral2/files/0x001a00000002b4e2-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3092	WINWORD.exe
1720	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-1-5-21-2824035265-2271499813-2042964211-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-02_0bb9dcc128b09e35089eb35224885b33_elex_wannacry.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
4316	cmd.exe
2780	PING.EXE
444	PING.EXE
3676	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2780	PING.EXE
444	PING.EXE
3676	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 816 wrote to memory of 3092	816	2026-06-02_0bb9dcc128b09e35089eb35224885b33_elex_wannacry.exe	83
PID 3092 wrote to memory of 4316	3092	WINWORD.exe	84
PID 4316 wrote to memory of 2780	4316	cmd.exe	86
PID 4316 wrote to memory of 444	4316	cmd.exe	87
PID 4316 wrote to memory of 3676	4316	cmd.exe	88
PID 4316 wrote to memory of 1720	4316	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-06-02_0bb9dcc128b09e35089eb35224885b33_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-02_0bb9dcc128b09e35089eb35224885b33_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:816
- 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:3092
- - 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\00006DDB" 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:4316
  - - 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:2780
  - - 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:444
  - - 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:3676
  - - 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:1720

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

Replay Monitor

Loading Replay Monitor...

Downloads

00006DDB

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006DDB
Size 32KB
SHA256 11f410cc3b32bbc3a23ea662f237df05ae7b18e6673b451905f0af0bc1523de9
MD5 d530251ae18dfb6715294689289587b1
SHA1 8ad90fdc2dfa9164e8961cdb03abf6efc478b04b
SHA512 1b16e0b0ed142fb8dc96a65ee20e1101a6b6d6271892bdf06255311d9d3bc5771332d7203968a3c1782ef0f43a18ce98c84c8bbd11eb0f5df81e37363af4ee13
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpM:OLsF2Kerc64sTiX2IV0DhuM
TLSH
T1FFE23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 13eb3301755eb484fa4ef37e0d8ed65d91f392e53d3f0de9cf35001b6aedcdbc
MD5 0bb9dcc128b09e35089eb35224885b33
SHA1 905f6f21713505ac94cdf439fcb2c2d7893dab1f
SHA512 04fd75029bbf7bc4293dff30c52a1497dd2e78cafdd7f2056221a97ba4d25b383308c9d19f63c7e2ac9b049bd0b84eb35e66a21f0e2b03f0ba6785e6f4f5b38f
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpZ:OLsF2Kerc64sTiX2IV0DhuZ
TLSH
T104E23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads