juko | 5d6406cf230662a179053d339646c9e4a8b138667387761b4dc9fb40f1e4a71f

General

Target
2026-07-24_0cb56ce53b186981ae2b6378f4846aa2_elex_wannacry.exe
Size 47KB
Sample260724-mh61faxtew
SHA256 5d6406cf230662a179053d339646c9e4a8b138667387761b4dc9fb40f1e4a71f
MD5 0cb56ce53b186981ae2b6378f4846aa2
SHA1 a8f6c8aa53f45bd4beda526d442646fa2e2d61d2
SHA512 3cd8571918bf604e9fae784361a207f028b662e9ce0e9475d428a1669c6a08cd60934b97e0dfa4e3478c401551d0aa0e7bc11700ce9275f31f55f483888006bd
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJG:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqx8
TLSH
T17D235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
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/0x000b000000019caa-4.dat	family_juko
behavioral2/files/0x000d00000001c577-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4916	WINWORD.exe
4836	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-1-5-21-4046655672-1449839301-2197395821-1000\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
1944	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	2026-07-24_0cb56ce53b186981ae2b6378f4846aa2_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
1944	cmd.exe
5820	PING.EXE
4960	PING.EXE
2508	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5820	PING.EXE
4960	PING.EXE
2508	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4396 wrote to memory of 4916	4396	2026-07-24_0cb56ce53b186981ae2b6378f4846aa2_elex_wannacry.exe	89
PID 4916 wrote to memory of 1944	4916	WINWORD.exe	90
PID 1944 wrote to memory of 5820	1944	cmd.exe	92
PID 1944 wrote to memory of 4960	1944	cmd.exe	93
PID 1944 wrote to memory of 2508	1944	cmd.exe	94
PID 1944 wrote to memory of 4836	1944	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-24_0cb56ce53b186981ae2b6378f4846aa2_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-24_0cb56ce53b186981ae2b6378f4846aa2_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4396
- 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:4916
- - 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\000054D5" 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:1944
  - - 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:5820
  - - 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:4960
  - - 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:2508
  - - 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:4836

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

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Downloads

000054D5

Path C:\Users\Admin\AppData\Roaming\Mozilla\000054D5
Size 47KB
SHA256 20b641a346ad1842229c8d721a120fb32341a79a63a0f8d976e011218a39b2fc
MD5 016473be6c3712e2ec35a6bb6a85c832
SHA1 f95e4b42afea2896dde6a1cd1d119aefc1e9d5c2
SHA512 3ee7796d7761fe4616d79f43c6b7687518cb074584317230221bf9eedf082a15d0cc4a2c5ce5e7006f95c6b31525bfa6dee24874109a9613400fb1132a8ccd33
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJl:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxv
TLSH
T18E235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 47KB
SHA256 5d6406cf230662a179053d339646c9e4a8b138667387761b4dc9fb40f1e4a71f
MD5 0cb56ce53b186981ae2b6378f4846aa2
SHA1 a8f6c8aa53f45bd4beda526d442646fa2e2d61d2
SHA512 3cd8571918bf604e9fae784361a207f028b662e9ce0e9475d428a1669c6a08cd60934b97e0dfa4e3478c401551d0aa0e7bc11700ce9275f31f55f483888006bd
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJG:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqx8
TLSH
T17D235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
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