juko | 156727409640e0499b4d2280311c9b286cad4496a8c8cc1b2d66c601f1188b32

General

Target
2026-05-17_93a7f3d835fd98ca0df60573cb49782b_elex_wannacry.exe
Size 32KB
Sample260517-s6dxfset6m
SHA256 156727409640e0499b4d2280311c9b286cad4496a8c8cc1b2d66c601f1188b32
MD5 93a7f3d835fd98ca0df60573cb49782b
SHA1 290e8da40724717c91dc7ef30b4c60f056ae1ef1
SHA512 0ed5e2ab26a9eba0eaf8784d92e297e4904e45f0347b0e5b12993f6a6e565c6f7025e6c34a5dd6c13070538a55c9ca08e15e2826427972d1e073152e74f86139
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpb:OLsF2Kerc64sTiX2IV0Dhub
TLSH
T1D0E23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
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/0x000b00000002a254-5.dat	family_juko
behavioral2/files/0x001b00000002b61a-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3068	WINWORD.exe
5348	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-1-5-21-226940941-599731907-2645636698-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-17_93a7f3d835fd98ca0df60573cb49782b_elex_wannacry.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
5164	cmd.exe
5200	PING.EXE
3716	PING.EXE
6004	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3716	PING.EXE
6004	PING.EXE
5200	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 3068	1724	2026-05-17_93a7f3d835fd98ca0df60573cb49782b_elex_wannacry.exe	79
PID 3068 wrote to memory of 5164	3068	WINWORD.exe	80
PID 5164 wrote to memory of 5200	5164	cmd.exe	82
PID 5164 wrote to memory of 3716	5164	cmd.exe	83
PID 5164 wrote to memory of 6004	5164	cmd.exe	84
PID 5164 wrote to memory of 5348	5164	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-17_93a7f3d835fd98ca0df60573cb49782b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-17_93a7f3d835fd98ca0df60573cb49782b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1724
- 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:3068
- - 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\0000251C" 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:5164
  - - 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:5200
  - - 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:3716
  - - 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:6004
  - - 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:5348

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

0000251C

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000251C
Size 32KB
SHA256 b6ace33afcbefa927330a10c6fea4362ca8dacdae29e29f79950ee99b5275f3f
MD5 ecb6df082dad3c23d93f1a993b5c1b30
SHA1 7a5e02b36bc4609943084760df492e91a9b42187
SHA512 b2acef09468366546f2a72a583bf4f24e5c3dba4d356f3d50bfc2e44a4346431d04ad8fc846871920135553168eb03e9612dd6c7f2f1a1483c483b2359003ece
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHp8:OLsF2Kerc64sTiX2IV0Dhu8
TLSH
T1E2E23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 156727409640e0499b4d2280311c9b286cad4496a8c8cc1b2d66c601f1188b32
MD5 93a7f3d835fd98ca0df60573cb49782b
SHA1 290e8da40724717c91dc7ef30b4c60f056ae1ef1
SHA512 0ed5e2ab26a9eba0eaf8784d92e297e4904e45f0347b0e5b12993f6a6e565c6f7025e6c34a5dd6c13070538a55c9ca08e15e2826427972d1e073152e74f86139
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpb:OLsF2Kerc64sTiX2IV0Dhub
TLSH
T1D0E23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
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