juko | f2d1053f11de71466de31ee6ab84eac1c1bd5f7557a62c8a606e303bc3a3d5c7

General

Target
2026-05-17_e33e6db93d3295457140a44785392322_elex_wannacry.exe
Size 53KB
Sample260517-tgxhyaew9j
SHA256 f2d1053f11de71466de31ee6ab84eac1c1bd5f7557a62c8a606e303bc3a3d5c7
MD5 e33e6db93d3295457140a44785392322
SHA1 74e2d7eceb36714a7635e38f8dd34c6e14394fb2
SHA512 4159d96eab65261fb4bf878561552985d6667c5260db9b1b81056f6a6f065058aa86929500d079ad45451c9d585c26780db27c7b230d3531499439c8df9bfb7a
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2x:3Ly2Kerc64CiGIm1tcBMUOOFx
TLSH
T1D5335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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/0x001b00000002b45e-4.dat	family_juko
behavioral2/files/0x001d00000002b463-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3984	WINWORD.exe
3384	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-1-5-21-125073035-2952146151-721812867-1000\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	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_e33e6db93d3295457140a44785392322_elex_wannacry.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
3532	PING.EXE
3288	cmd.exe
5032	PING.EXE
3276	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3532	PING.EXE
5032	PING.EXE
3276	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1264 wrote to memory of 3984	1264	2026-05-17_e33e6db93d3295457140a44785392322_elex_wannacry.exe	80
PID 3984 wrote to memory of 3288	3984	WINWORD.exe	81
PID 3288 wrote to memory of 5032	3288	cmd.exe	83
PID 3288 wrote to memory of 3276	3288	cmd.exe	84
PID 3288 wrote to memory of 3532	3288	cmd.exe	85
PID 3288 wrote to memory of 3384	3288	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-17_e33e6db93d3295457140a44785392322_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-17_e33e6db93d3295457140a44785392322_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1264
- 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:3984
- - 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\0000590E" 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:3288
  - - 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:5032
  - - 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:3276
  - - 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:3532
  - - 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:3384

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

0000590E

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000590E
Size 53KB
SHA256 9c5b8ae216c5af3a164e797b5b7ffe53dcdfaf821f763243914142ed851ebec8
MD5 2428f9e3da166e0526a98e0e9da1a7ad
SHA1 405ba2cb578d8c10c76c74a8b95c2fe307372533
SHA512 de48d76507f92211a661927498087aa03f21639727c40023c579714ca055ab664625db4f176d44f7ebf1449e92ba98507ce6bc88e3ce31517ad27dbe1f66f263
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2S:3Ly2Kerc64CiGIm1tcBMUOOFS
TLSH
T1EB335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 53KB
SHA256 f2d1053f11de71466de31ee6ab84eac1c1bd5f7557a62c8a606e303bc3a3d5c7
MD5 e33e6db93d3295457140a44785392322
SHA1 74e2d7eceb36714a7635e38f8dd34c6e14394fb2
SHA512 4159d96eab65261fb4bf878561552985d6667c5260db9b1b81056f6a6f065058aa86929500d079ad45451c9d585c26780db27c7b230d3531499439c8df9bfb7a
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2x:3Ly2Kerc64CiGIm1tcBMUOOFx
TLSH
T1D5335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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