juko | e6dd130032080594b6ba351763a2adc198872cb17ad9377de3970aa0e00f6b45

General

Target
2026-07-16_7f6d59d166e4b3481f6277808bf161c8_elex_wannacry.exe
Size 39KB
Sample260716-dbfp8se17x
SHA256 e6dd130032080594b6ba351763a2adc198872cb17ad9377de3970aa0e00f6b45
MD5 7f6d59d166e4b3481f6277808bf161c8
SHA1 ee89c4f38682e9676ad998e717b1e22609bfee83
SHA512 1ac52a94d4d4a36f9a6a978746e76c58af6dd5e43e9bdadedf078f8fe423701945831252d4f8e22ba4b2e7923897429c4fda6c3540ab14e2654b5c18b521f884
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSB9:aLsF2Kerc64sTiX2IV0DVyIGFW
TLSH
T1B9036B1B2964B062C69611B0F8696F34C03D9DB4052BF052F7447B992CB6DA3DF71ACE
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 7 IoCs

resource	yara_rule
behavioral2/memory/4204-0-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x001300000001b664-5.dat	family_juko
behavioral2/memory/4204-9-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/5752-12-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x000f00000001c492-13.dat	family_juko
behavioral2/memory/1268-15-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/1268-16-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5752	WINWORD.exe
1268	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-1-5-21-2246396966-3025826688-3847171515-1000\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	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	2026-07-16_7f6d59d166e4b3481f6277808bf161c8_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

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
2960	cmd.exe
2436	PING.EXE
932	PING.EXE
5400	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2436	PING.EXE
932	PING.EXE
5400	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4204 wrote to memory of 5752	4204	2026-07-16_7f6d59d166e4b3481f6277808bf161c8_elex_wannacry.exe	87
PID 5752 wrote to memory of 2960	5752	WINWORD.exe	88
PID 2960 wrote to memory of 2436	2960	cmd.exe	90
PID 2960 wrote to memory of 932	2960	cmd.exe	91
PID 2960 wrote to memory of 5400	2960	cmd.exe	92
PID 2960 wrote to memory of 1268	2960	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-16_7f6d59d166e4b3481f6277808bf161c8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-16_7f6d59d166e4b3481f6277808bf161c8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4204
- 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:5752
- - 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\000013F8" 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:2960
  - - 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:2436
  - - 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:932
  - - 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:5400
  - - 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:1268

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

000013F8

Path C:\Users\Admin\AppData\Roaming\Mozilla\000013F8
Size 39KB
SHA256 351a7331e5dead99839ed540bcd8f3e3efb88a3fd88e454f09cbd2a75c562c42
MD5 c428829451b87c29e31e327ef8dc0c7d
SHA1 fad7e3c846da365bf50cc66a2f09193934c42252
SHA512 36b664d14af6f0aaaa40c1b12b9c1ccefcca593a0bbaea0ecb1dc1724969e0046221aa7e7c478d55a34ea6c3d5195e944eda4c93f5850b610a90bc618923ad81
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSB1:aLsF2Kerc64sTiX2IV0DVyIGFW
TLSH
T1E7036B1B2964B062C69611B0F8696F34C03D9DB4052BF052F7447B992CB6DA3DF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 39KB
SHA256 e6dd130032080594b6ba351763a2adc198872cb17ad9377de3970aa0e00f6b45
MD5 7f6d59d166e4b3481f6277808bf161c8
SHA1 ee89c4f38682e9676ad998e717b1e22609bfee83
SHA512 1ac52a94d4d4a36f9a6a978746e76c58af6dd5e43e9bdadedf078f8fe423701945831252d4f8e22ba4b2e7923897429c4fda6c3540ab14e2654b5c18b521f884
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSB9:aLsF2Kerc64sTiX2IV0DVyIGFW
TLSH
T1B9036B1B2964B062C69611B0F8696F34C03D9DB4052BF052F7447B992CB6DA3DF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1268-15-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/1268-16-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/4204-0-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/4204-9-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/5752-12-0x0000000000400000-0x000000000041D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads