juko | ebb738bb1ae100e776739205b2d9230bcf22494f3c8f60492675a9254bd2dbe6

General

Target
2026-08-14_0609d343b029b61704518f81c5806e26_elex_wannacry.exe
Size 87KB
Sample260814-cavmbssflg
SHA256 ebb738bb1ae100e776739205b2d9230bcf22494f3c8f60492675a9254bd2dbe6
MD5 0609d343b029b61704518f81c5806e26
SHA1 47b2ef388eac088bde98fd1d0312d4e9e480a151
SHA512 f565e8a4fdf6218444ec334c5c74ecc530ed59f3b7da687f9a4eb0fdc06ca65fecf09b3425f0297aa9de017577a3f19d2352e3db84d088a36b0eea0af2c2f51b
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpE:2Ly2Kerc64CiGIm1K851YO6EQkwpE
TLSH
T1A893A1763A259190C48BD138E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution juko persistence trojan

Malware Config

Signatures

Family: Juko
Juko is a trojan written in C++.
trojan juko

Detects Juko 7 IoCs

resource	yara_rule
behavioral2/memory/3308-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x00180000000115ef-5.dat	family_juko
behavioral2/memory/3308-9-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/1684-12-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x0006000000016cd1-13.dat	family_juko
behavioral2/memory/3444-15-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/3444-16-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1684	WINWORD.exe
3444	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-1-5-21-3989226554-2204910950-1522900112-1000\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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
1772	cmd.exe

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	2026-08-14_0609d343b029b61704518f81c5806e26_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
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

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
1772	cmd.exe
1332	PING.EXE
3152	PING.EXE
5132	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1332	PING.EXE
3152	PING.EXE
5132	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3308 wrote to memory of 1684	3308	2026-08-14_0609d343b029b61704518f81c5806e26_elex_wannacry.exe	89
PID 1684 wrote to memory of 1772	1684	WINWORD.exe	90
PID 1772 wrote to memory of 1332	1772	cmd.exe	92
PID 1772 wrote to memory of 3152	1772	cmd.exe	93
PID 1772 wrote to memory of 5132	1772	cmd.exe	94
PID 1772 wrote to memory of 3444	1772	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-14_0609d343b029b61704518f81c5806e26_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-14_0609d343b029b61704518f81c5806e26_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3308
- 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:1684
- - 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\000043C3" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:1772
  - - 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:1332
  - - 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:3152
  - - 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:5132
  - - 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:3444

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:1652

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

000043C3

Path C:\Users\Admin\AppData\Roaming\Mozilla\000043C3
Size 87KB
SHA256 e037b22f8c51e8ba11d966c47bc8f7c075f8d19bac51241d6f4f177b0e3f7036
MD5 bd4ed397e8e11c2108fc8ed18853ad94
SHA1 d16eefc4ff4b014accdb040fdc1a30f868bacdac
SHA512 15faf13b8bb552011760b1115f7055a6c67c76bfb399fe13b47a18948257e17c48559f30ad9016bf8c017a5e3b4fcdee3b126914628dfb24993ffe72fc9627ef
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpe:2Ly2Kerc64CiGIm1K851YO6EQkwpe
TLSH
T13993A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 87KB
SHA256 ebb738bb1ae100e776739205b2d9230bcf22494f3c8f60492675a9254bd2dbe6
MD5 0609d343b029b61704518f81c5806e26
SHA1 47b2ef388eac088bde98fd1d0312d4e9e480a151
SHA512 f565e8a4fdf6218444ec334c5c74ecc530ed59f3b7da687f9a4eb0fdc06ca65fecf09b3425f0297aa9de017577a3f19d2352e3db84d088a36b0eea0af2c2f51b
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpE:2Ly2Kerc64CiGIm1K851YO6EQkwpE
TLSH
T1A893A1763A259190C48BD138E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1684-12-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3308-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3308-9-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3444-15-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3444-16-0x0000000000400000-0x0000000000425000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads