juko | 11a1f15d962de9bbc7dc61c7bad696852ebd486d3c9949ceff1faa9fc541d61c

General

Target
2026-09-03_7381684d2bc97553b980fedff04d8650_elex_wannacry.exe
Size 32KB
Sample260905-3dn7tsvblb
SHA256 11a1f15d962de9bbc7dc61c7bad696852ebd486d3c9949ceff1faa9fc541d61c
MD5 7381684d2bc97553b980fedff04d8650
SHA1 65fe5ced775823d128e426a5ff83080409b32a82
SHA512 1349952bffe07d1114b555c8e808fca0b59d9314e911b1b444dd63f41e26d592dddb9c07651b94fc5a4af6bee7d5513d40fb911f77ee68eb25e97b8c0b98062d
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbf/:tLsF2Kerc64sTiX2IV0DYQ3
TLSH
T1B7E23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
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/0x0009000000019ce0-4.dat	family_juko
behavioral2/files/0x000f00000001c4fe-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3384	WINWORD.exe
1984	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-1-5-21-552508041-2681165170-3229858294-1000\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
4296	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	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	2026-09-03_7381684d2bc97553b980fedff04d8650_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

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
4296	cmd.exe
5456	PING.EXE
4572	PING.EXE
3956	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4572	PING.EXE
3956	PING.EXE
5456	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1392 wrote to memory of 3384	1392	2026-09-03_7381684d2bc97553b980fedff04d8650_elex_wannacry.exe	89
PID 3384 wrote to memory of 4296	3384	WINWORD.exe	90
PID 4296 wrote to memory of 5456	4296	cmd.exe	92
PID 4296 wrote to memory of 4572	4296	cmd.exe	93
PID 4296 wrote to memory of 3956	4296	cmd.exe	94
PID 4296 wrote to memory of 1984	4296	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-09-03_7381684d2bc97553b980fedff04d8650_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-03_7381684d2bc97553b980fedff04d8650_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1392
- 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:3384
- - 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\000013F8" 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:4296
  - - 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:5456
  - - 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:4572
  - - 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:3956
  - - 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:1984

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

000013F8

Path C:\Users\Admin\AppData\Roaming\Mozilla\000013F8
Size 32KB
SHA256 c38f726427746f0ca1e5d29ce7f3b0eb3bda27282d9b74aa13b3ff3e532d7f95
MD5 be912b3ea3986a342c8bb37f6bdde307
SHA1 ed7b3681d73b13200d5b5cd219310f091f498c0e
SHA512 ef55d6330644a0528155882eb0465a03f5f85f82498f0520d4a3184d469b5b98641d819124da9caa5e4dc90302ba8caef73efcf0d682db4f9f393a8be7bae9ec
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbfc:tLsF2Kerc64sTiX2IV0DYQE
TLSH
T13EE23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 11a1f15d962de9bbc7dc61c7bad696852ebd486d3c9949ceff1faa9fc541d61c
MD5 7381684d2bc97553b980fedff04d8650
SHA1 65fe5ced775823d128e426a5ff83080409b32a82
SHA512 1349952bffe07d1114b555c8e808fca0b59d9314e911b1b444dd63f41e26d592dddb9c07651b94fc5a4af6bee7d5513d40fb911f77ee68eb25e97b8c0b98062d
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbf/:tLsF2Kerc64sTiX2IV0DYQ3
TLSH
T1B7E23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
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