juko | e2e765c3afe93c9013f6ac07238164db8f245363a932caabcd8f355a70c5a21d

General

Target
2026-07-20_6ae4b1c6c62a7180fce4fa23292583fd_elex_wannacry.exe
Size 64KB
Sample260720-djpccaf131
SHA256 e2e765c3afe93c9013f6ac07238164db8f245363a932caabcd8f355a70c5a21d
MD5 6ae4b1c6c62a7180fce4fa23292583fd
SHA1 814403686bb7c9dc8534055de226c04d815016d3
SHA512 4faa474201299d2889402508aa9017e3e0520d9aa25851c8ac254a22ca9ca50f51b8efde609d323adb3bb66c5d1507f5911393347589383c578e0682f397243d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/u/:sLy2Kerc64CiGIm8so28/
TLSH
T1A8536C2EA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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 2 IoCs

resource	yara_rule
behavioral2/files/0x000600000000053e-4.dat	family_juko
behavioral2/files/0x0005000000016b40-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3628	WINWORD.exe
1656	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-1-5-21-3797332335-34111092-3597280141-1000\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
3136	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	2026-07-20_6ae4b1c6c62a7180fce4fa23292583fd_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
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
1616	PING.EXE
3136	cmd.exe
1120	PING.EXE
5044	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1616	PING.EXE
1120	PING.EXE
5044	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1188 wrote to memory of 3628	1188	2026-07-20_6ae4b1c6c62a7180fce4fa23292583fd_elex_wannacry.exe	89
PID 3628 wrote to memory of 3136	3628	WINWORD.exe	90
PID 3136 wrote to memory of 1120	3136	cmd.exe	92
PID 3136 wrote to memory of 5044	3136	cmd.exe	93
PID 3136 wrote to memory of 1616	3136	cmd.exe	94
PID 3136 wrote to memory of 1656	3136	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-20_6ae4b1c6c62a7180fce4fa23292583fd_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-20_6ae4b1c6c62a7180fce4fa23292583fd_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1188
- 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:3628
- - 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\000027E8" 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:3136
  - - 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:1120
  - - 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:5044
  - - 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:1616
  - - 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:1656

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

000027E8

Path C:\Users\Admin\AppData\Roaming\Mozilla\000027E8
Size 64KB
SHA256 4807bcebca6d2a71da02f811250e6af6c2e09c103a94806b175950678e049b67
MD5 d17a4dccbe903f93d438515eb3b7a15f
SHA1 0f16625e1a8d2e804eb0cd1395947925e5c91693
SHA512 484ca80838f7a88244a03dfcbdcf50b9258be251d8feecd60a93ed8db332b2e5b051c4f0ded2da14a891b7a611836d7a9d03fe7f0884ae79d2fb7dbf9fd4376b
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/u7:sLy2Kerc64CiGIm8so287
TLSH
T125536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 e2e765c3afe93c9013f6ac07238164db8f245363a932caabcd8f355a70c5a21d
MD5 6ae4b1c6c62a7180fce4fa23292583fd
SHA1 814403686bb7c9dc8534055de226c04d815016d3
SHA512 4faa474201299d2889402508aa9017e3e0520d9aa25851c8ac254a22ca9ca50f51b8efde609d323adb3bb66c5d1507f5911393347589383c578e0682f397243d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/u/:sLy2Kerc64CiGIm8so28/
TLSH
T1A8536C2EA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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