juko | 01f6003603ac5b9b7555b1441d343f7ee650c0981b8ca2d3a9ed50514f7f5b36

Analysis

max time kernel
149s
max time network
146s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
25/04/2026, 03:31

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General

Target
2026-04-25_d7c6e1b2e7d476fa683ed69ec5809fdb_elex_wannacry.exe
Size 56KB
Sample260425-d3ks9set4y
SHA256 01f6003603ac5b9b7555b1441d343f7ee650c0981b8ca2d3a9ed50514f7f5b36
MD5 d7c6e1b2e7d476fa683ed69ec5809fdb
SHA1 58596d74f8848ff7e074a19ab44712946a151d83
SHA512 0a43c021420cae037127f13e2f6b8b5680a3276d014e0e1e8f76f398878471e91965121f72cf2b7ef972a235dc994fa4b60fffd73a0ee0fc2afbbf1779dcc7cf
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWE:PLy2Kerc64CiGImqRa8OKFE9WBE
TLSH
T1B84319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
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 8 IoCs

resource	yara_rule
behavioral2/memory/2956-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x002300000002b17b-5.dat	family_juko
behavioral2/memory/2972-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/2956-14-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/2972-17-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b415-18.dat	family_juko
behavioral2/memory/3568-20-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/3568-22-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2972	WINWORD.exe
3568	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-1-5-21-2122505878-652277452-2375749442-1000\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	2026-04-25_d7c6e1b2e7d476fa683ed69ec5809fdb_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
2156	PING.EXE
552	cmd.exe
4584	PING.EXE
2104	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2104	PING.EXE
2156	PING.EXE
4584	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 2972	2956	2026-04-25_d7c6e1b2e7d476fa683ed69ec5809fdb_elex_wannacry.exe	80
PID 2972 wrote to memory of 552	2972	WINWORD.exe	81
PID 552 wrote to memory of 4584	552	cmd.exe	83
PID 552 wrote to memory of 2104	552	cmd.exe	84
PID 552 wrote to memory of 2156	552	cmd.exe	85
PID 552 wrote to memory of 3568	552	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-25_d7c6e1b2e7d476fa683ed69ec5809fdb_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-25_d7c6e1b2e7d476fa683ed69ec5809fdb_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2956
- 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:2972
- - 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\0000184F" 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:552
  - - 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:4584
  - - 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:2104
  - - 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:2156
  - - 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:3568

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

0000184F

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000184F
Size 56KB
SHA256 45dd9669727a93f7ebe1fd5643772d8c7900a66b04d1ff55baded2809a37bd55
MD5 996d641aedde466f5d830aaf0c81a791
SHA1 78d1f000ec4e9143bc14fe164218b67e42b93971
SHA512 421769a274bc9966652aee110476aa881c7ac9c744c793ee627d927de4338b9d21f6fa64ea22e1c491ed989beb01806e5eeb1a04b265af47158b4df084bd2e68
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWJ:PLy2Kerc64CiGImqRa8OKFE9WBJ
TLSH
T1E04319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 56KB
SHA256 01f6003603ac5b9b7555b1441d343f7ee650c0981b8ca2d3a9ed50514f7f5b36
MD5 d7c6e1b2e7d476fa683ed69ec5809fdb
SHA1 58596d74f8848ff7e074a19ab44712946a151d83
SHA512 0a43c021420cae037127f13e2f6b8b5680a3276d014e0e1e8f76f398878471e91965121f72cf2b7ef972a235dc994fa4b60fffd73a0ee0fc2afbbf1779dcc7cf
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWE:PLy2Kerc64CiGImqRa8OKFE9WBE
TLSH
T1B84319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2956-0-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/2956-14-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/2956-13-0x0000000000980000-0x00000000009FA000-memory.dmp

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memory/2972-12-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/2972-17-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/2972-16-0x0000000000870000-0x00000000008EA000-memory.dmp

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memory/3568-20-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/3568-22-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/3568-21-0x0000000000870000-0x00000000008EA000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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