juko | b064cd2de3efa85e91d92bc30643e76ff1c87fb1d27714a5903607735df71872

General

Target
2026-09-04_14e8b903467663666a724a52cb6d279a_elex_wannacry.exe
Size 69KB
Sample260905-wftf1afb47
SHA256 b064cd2de3efa85e91d92bc30643e76ff1c87fb1d27714a5903607735df71872
MD5 14e8b903467663666a724a52cb6d279a
SHA1 b973cbd4e0737dd1fb6ba610b4daf4cb9d88938c
SHA512 a4b0e3d5cf9c0a60332054d84b52e070b67e982c079e9579c97f0c0a285ea0ec6ef9011cd3d6c65fac7df1d00e7198b74daa4f9f6fe9c305fdc0689e05f97484
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9K:tLy2Kerc64CiGIm1K851YOhqYBwEM9K
TLSH
T19D63F70737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
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/0x000700000001b85f-4.dat	family_juko
behavioral2/files/0x000f00000001c520-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2736	WINWORD.exe
1248	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
5188	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-04_14e8b903467663666a724a52cb6d279a_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

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
5188	cmd.exe
2068	PING.EXE
2920	PING.EXE
4080	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2920	PING.EXE
4080	PING.EXE
2068	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2736	2932	2026-09-04_14e8b903467663666a724a52cb6d279a_elex_wannacry.exe	90
PID 2736 wrote to memory of 5188	2736	WINWORD.exe	91
PID 5188 wrote to memory of 2068	5188	cmd.exe	93
PID 5188 wrote to memory of 2920	5188	cmd.exe	94
PID 5188 wrote to memory of 4080	5188	cmd.exe	95
PID 5188 wrote to memory of 1248	5188	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-09-04_14e8b903467663666a724a52cb6d279a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-04_14e8b903467663666a724a52cb6d279a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2932
- 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:2736
- - 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\000031EA" 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:5188
  - - 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:2068
  - - 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:2920
  - - 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:4080
  - - 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:1248

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

Replay Monitor

Loading Replay Monitor...

Downloads

000031EA

Path C:\Users\Admin\AppData\Roaming\Mozilla\000031EA
Size 69KB
SHA256 d4d5547b3b803c707c6f04111081f125c098c9ec03a19a4f8a4f96239c98d2c1
MD5 cae81dd0ecf7a740e38a004846156b0a
SHA1 260ebc56ed5a421cff8ac185938c5db2bae0e05f
SHA512 27d6f8131b52459a82ddc31621c5a27a6b71c21e990da51f99ebe1d40f1cc27336f0f016280e8f39bd2eee52602a22ea14d267e38af6a02b43d6c9f2bb097afa
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9c:tLy2Kerc64CiGIm1K851YOhqYBwEM9c
TLSH
T13863F70737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 69KB
SHA256 b064cd2de3efa85e91d92bc30643e76ff1c87fb1d27714a5903607735df71872
MD5 14e8b903467663666a724a52cb6d279a
SHA1 b973cbd4e0737dd1fb6ba610b4daf4cb9d88938c
SHA512 a4b0e3d5cf9c0a60332054d84b52e070b67e982c079e9579c97f0c0a285ea0ec6ef9011cd3d6c65fac7df1d00e7198b74daa4f9f6fe9c305fdc0689e05f97484
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9K:tLy2Kerc64CiGIm1K851YOhqYBwEM9K
TLSH
T19D63F70737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
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