juko | 9e0760e2b0f856c8ce9465796c15dc71974942f12491ded9ab62f6e4221417a4

General

Target
2026-05-05_cd189b0fdb9b10122f252b7a5b44bc71_elex_wannacry.exe
Size 32KB
Sample260505-mjfvmsgv7m
SHA256 9e0760e2b0f856c8ce9465796c15dc71974942f12491ded9ab62f6e4221417a4
MD5 cd189b0fdb9b10122f252b7a5b44bc71
SHA1 4494d34497a856daf896bd6b8209ec7a2cd83355
SHA512 50e7af70ca7167399222881ba05e0c5130fc79362b02f3f128365bd3ce9fa1d5d8f7b38f2fbe965d90a59b4c2d9ccbcdc3207e87eee9bfd106c504a123156d5e
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7f:ZLsF2Kerc64sTiX2IV0DKy7f
TLSH
T1D3E23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
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/0x002f00000002b19f-4.dat	family_juko
behavioral2/files/0x001b00000002b45c-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4956	WINWORD.exe
5084	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-1-5-21-1383858298-2057492509-1726743289-1000\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	2026-05-05_cd189b0fdb9b10122f252b7a5b44bc71_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
3736	PING.EXE
4516	PING.EXE
5004	PING.EXE
3940	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3736	PING.EXE
4516	PING.EXE
5004	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1456 wrote to memory of 4956	1456	2026-05-05_cd189b0fdb9b10122f252b7a5b44bc71_elex_wannacry.exe	80
PID 4956 wrote to memory of 3940	4956	WINWORD.exe	81
PID 3940 wrote to memory of 3736	3940	cmd.exe	83
PID 3940 wrote to memory of 4516	3940	cmd.exe	84
PID 3940 wrote to memory of 5004	3940	cmd.exe	85
PID 3940 wrote to memory of 5084	3940	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-05_cd189b0fdb9b10122f252b7a5b44bc71_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-05_cd189b0fdb9b10122f252b7a5b44bc71_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1456
- 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:4956
- - 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\00002116" 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:3940
  - - 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:3736
  - - 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:4516
  - - 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:5004
  - - 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:5084

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

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Downloads

00002116

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002116
Size 32KB
SHA256 91525c221b5c5dad9ea1c3960d1d0db43e674777f800d2b1cba09439e1599c36
MD5 91b675703b1594108f2506d1e471c50a
SHA1 fd06e2e58b39f715f80aced035a99344a5bdf7d0
SHA512 b69de4634e5654e1cb7c4a9cba1456fe88a3ee6774c92e9202026767927d016957f772ece272fe0b605d5b22d97594e45e4513c715abc103e0a16137835d6fe8
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf73:ZLsF2Kerc64sTiX2IV0DKy73
TLSH
T116E23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 9e0760e2b0f856c8ce9465796c15dc71974942f12491ded9ab62f6e4221417a4
MD5 cd189b0fdb9b10122f252b7a5b44bc71
SHA1 4494d34497a856daf896bd6b8209ec7a2cd83355
SHA512 50e7af70ca7167399222881ba05e0c5130fc79362b02f3f128365bd3ce9fa1d5d8f7b38f2fbe965d90a59b4c2d9ccbcdc3207e87eee9bfd106c504a123156d5e
SSDEEP 768:J9ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqNNPWQHf7f:ZLsF2Kerc64sTiX2IV0DKy7f
TLSH
T1D3E23B2B6AA57052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
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