juko | 6f8e8213cbbc22b12956ced6532647017b8280f08c7f2528c0470aed790742ba

General

Target
2026-08-30_ee1fcaa2da0d62476483e3165450cd0a_elex_wannacry.exe
Size 56KB
Sample260831-bshj2sec43
SHA256 6f8e8213cbbc22b12956ced6532647017b8280f08c7f2528c0470aed790742ba
MD5 ee1fcaa2da0d62476483e3165450cd0a
SHA1 f5f76ca4b1420d11fc3910650d00f3012ace4f71
SHA512 8c561b56669f0966a3e246c7071502cdf15b85794824533f5a0cebdedfb03c95fe3a21dbdb8295dbd15953228eac1dcc6494ad99c68532d8eed3f179f4f23619
SSDEEP 1536:pLsF2Kerc64sTiX2IV0DhuD8OKFVG9WGWj:pLy2Kerc64CiGImVuD8OKFE9WBj
TLSH
T19A4319263AE61CD3C15364F0EAE49B308078FD7219279023E794BB9815BEC92DF7199D
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 7 IoCs

resource	yara_rule
behavioral2/memory/1080-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x000b00000001b852-5.dat	family_juko
behavioral2/memory/1080-10-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/2212-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x000f00000001c489-13.dat	family_juko
behavioral2/memory/1720-15-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/1720-16-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2212	WINWORD.exe
1720	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-1-5-21-189034102-168398478-1159367937-1000\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
1504	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	2026-08-30_ee1fcaa2da0d62476483e3165450cd0a_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
1868	PING.EXE
2512	PING.EXE
2940	PING.EXE
1504	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1868	PING.EXE
2512	PING.EXE
2940	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 2212	1080	2026-08-30_ee1fcaa2da0d62476483e3165450cd0a_elex_wannacry.exe	89
PID 2212 wrote to memory of 1504	2212	WINWORD.exe	90
PID 1504 wrote to memory of 1868	1504	cmd.exe	92
PID 1504 wrote to memory of 2512	1504	cmd.exe	93
PID 1504 wrote to memory of 2940	1504	cmd.exe	94
PID 1504 wrote to memory of 1720	1504	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-30_ee1fcaa2da0d62476483e3165450cd0a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-30_ee1fcaa2da0d62476483e3165450cd0a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1080
- 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:2212
- - 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\00003543" 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:1504
  - - 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:1868
  - - 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:2512
  - - 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:2940
  - - 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:1720

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

00003543

Path C:\Users\Admin\AppData\Roaming\Mozilla\00003543
Size 56KB
SHA256 ea8be0bf513c98f9b505aed3c76ebde91716ce4165b9d9d1ca9a9b5c67e1befc
MD5 2ad2a91bddec5078b2abf9d7d96dbdc9
SHA1 6da3a81bc9c782f70bc0411cdcb36affc9931713
SHA512 6bc5622212788b66b72fef364de7411f10615381b3ffa678573d596712bdf3250c189bc31accacfab69f59788294db892deee97bc0bd1982dfa8d7b22091aafa
SSDEEP 1536:pLsF2Kerc64sTiX2IV0DhuD8OKFVG9WGWu:pLy2Kerc64CiGImVuD8OKFE9WBu
TLSH
T13643192A3AE61CD3C15364F0EAE49B308078FD7219279023E7947B9815BEC92DF7199D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 56KB
SHA256 6f8e8213cbbc22b12956ced6532647017b8280f08c7f2528c0470aed790742ba
MD5 ee1fcaa2da0d62476483e3165450cd0a
SHA1 f5f76ca4b1420d11fc3910650d00f3012ace4f71
SHA512 8c561b56669f0966a3e246c7071502cdf15b85794824533f5a0cebdedfb03c95fe3a21dbdb8295dbd15953228eac1dcc6494ad99c68532d8eed3f179f4f23619
SSDEEP 1536:pLsF2Kerc64sTiX2IV0DhuD8OKFVG9WGWj:pLy2Kerc64CiGImVuD8OKFE9WBj
TLSH
T19A4319263AE61CD3C15364F0EAE49B308078FD7219279023E794BB9815BEC92DF7199D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1080-0-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/1080-10-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/1720-15-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/1720-16-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/2212-12-0x0000000000400000-0x0000000000422000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads