juko | 92c14e417d1ac802866b6948bcfd3d8911d27ec4bde6104fa269932aa00dae38

General

Target
2026-08-25_dd4ace474977684b516128e6721c1345_elex_wannacry.exe
Size 50KB
Sample260826-gseq2ssfjg
SHA256 92c14e417d1ac802866b6948bcfd3d8911d27ec4bde6104fa269932aa00dae38
MD5 dd4ace474977684b516128e6721c1345
SHA1 1c95fcc595efdee78e0dd0be10c154fe1d4b5555
SHA512 3b0d9b219eba6821e4299ac195acb4b4b201d455cf5863578f95fb83cf093d9ac2a420551c291af1727eeac338e0d4fedd1a59b1be80badcc97a38d3ebb5fefa
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOr:tLsF2Kerc64sTiX2IV0DpL8SE9nYOr
TLSH
T18533291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
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/0x000e00000001b890-4.dat	family_juko
behavioral2/files/0x000f00000001c528-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3176	WINWORD.exe
1580	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-1-5-21-3986082593-3624157295-3514260330-1000\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
4716	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	2026-08-25_dd4ace474977684b516128e6721c1345_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
4716	cmd.exe
5508	PING.EXE
2052	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3736	PING.EXE
5508	PING.EXE
2052	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1608 wrote to memory of 3176	1608	2026-08-25_dd4ace474977684b516128e6721c1345_elex_wannacry.exe	89
PID 3176 wrote to memory of 4716	3176	WINWORD.exe	90
PID 4716 wrote to memory of 5508	4716	cmd.exe	92
PID 4716 wrote to memory of 2052	4716	cmd.exe	93
PID 4716 wrote to memory of 3736	4716	cmd.exe	94
PID 4716 wrote to memory of 1580	4716	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-25_dd4ace474977684b516128e6721c1345_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-25_dd4ace474977684b516128e6721c1345_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1608
- 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:3176
- - 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\0000058B" 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:4716
  - - 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:5508
  - - 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:2052
  - - 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:\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:1580

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

0000058B

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000058B
Size 50KB
SHA256 90c9595e076490bcda5f831e9c93ee93515aff795e9b1a043bbaaf92b33a5042
MD5 8519d0358439f88179f1d5d256d18ee6
SHA1 fb1ba09e8bde126db9f4b0cee762a6b5a3bcccb5
SHA512 2359f8c9632ef83a4a88c15ee80e2246796f047924b6c18f93ff0d5ea50c3d305f9ea68fb0d5ad85a78ccec79a32d0a1d99f331cdab4f8cc21a35965edd0ca03
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO2:tLsF2Kerc64sTiX2IV0DpL8SE9nYO2
TLSH
T1F833291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 92c14e417d1ac802866b6948bcfd3d8911d27ec4bde6104fa269932aa00dae38
MD5 dd4ace474977684b516128e6721c1345
SHA1 1c95fcc595efdee78e0dd0be10c154fe1d4b5555
SHA512 3b0d9b219eba6821e4299ac195acb4b4b201d455cf5863578f95fb83cf093d9ac2a420551c291af1727eeac338e0d4fedd1a59b1be80badcc97a38d3ebb5fefa
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOr:tLsF2Kerc64sTiX2IV0DpL8SE9nYOr
TLSH
T18533291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
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