juko | 6efee448fd5dd641f156d164eb66ec72ca6c28d046aa10fe383ecc991fa7188f

General

Target
2026-07-02_9d5d08ba1e9bd323ff9efbd80521466b_elex_wannacry.exe
Size 30KB
Sample260702-gs5bpsct8z
SHA256 6efee448fd5dd641f156d164eb66ec72ca6c28d046aa10fe383ecc991fa7188f
MD5 9d5d08ba1e9bd323ff9efbd80521466b
SHA1 d7c202876128c0af675b7a01eea78b398dc2a187
SHA512 4a76d62c6457ab39ce504cd982ee9ea73e26d41329ab4d8d9b46377151ee1b42bd8543ab538e6a420a74feff89d5818111595dbc993abcbc2826bd9fbb8162fe
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXg:tLsF2Kerc64sTiX2IV0Dzlog
TLSH
T1F7E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x000800000001b85a-4.dat	family_juko
behavioral2/files/0x000f00000001c5ae-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4216	WINWORD.exe
3316	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-1-5-21-2132828192-1552876075-2324613956-1000\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	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
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	2026-07-02_9d5d08ba1e9bd323ff9efbd80521466b_elex_wannacry.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
1264	PING.EXE
2136	cmd.exe
4548	PING.EXE
4544	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4548	PING.EXE
4544	PING.EXE
1264	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 460 wrote to memory of 4216	460	2026-07-02_9d5d08ba1e9bd323ff9efbd80521466b_elex_wannacry.exe	89
PID 4216 wrote to memory of 2136	4216	WINWORD.exe	90
PID 2136 wrote to memory of 4548	2136	cmd.exe	92
PID 2136 wrote to memory of 4544	2136	cmd.exe	93
PID 2136 wrote to memory of 1264	2136	cmd.exe	94
PID 2136 wrote to memory of 3316	2136	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-02_9d5d08ba1e9bd323ff9efbd80521466b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-02_9d5d08ba1e9bd323ff9efbd80521466b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:460
- 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:4216
- - 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\0000521C" 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:2136
  - - 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:4548
  - - 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:4544
  - - 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:1264
  - - 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:3316

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

0000521C

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000521C
Size 30KB
SHA256 79ef4bb80144f567338cf7c37b5ae92eba02af33b74e9d9d31abbe3e196f31bd
MD5 b3317ee8e14509aeef3fa9705ae6d575
SHA1 b5b3bb1b44117341da6549a615b8f40e280a8670
SHA512 e30bdfc8e4f1653563b241ada29557bf62ded5f57f188e96b7fecbd37ad8cc71a10add69fe578da8bae83525b5ddfb3b00de312d3c62c6ad6cbc9c2ef7469e81
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXy:tLsF2Kerc64sTiX2IV0Dzloy
TLSH
T1B1E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 6efee448fd5dd641f156d164eb66ec72ca6c28d046aa10fe383ecc991fa7188f
MD5 9d5d08ba1e9bd323ff9efbd80521466b
SHA1 d7c202876128c0af675b7a01eea78b398dc2a187
SHA512 4a76d62c6457ab39ce504cd982ee9ea73e26d41329ab4d8d9b46377151ee1b42bd8543ab538e6a420a74feff89d5818111595dbc993abcbc2826bd9fbb8162fe
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXg:tLsF2Kerc64sTiX2IV0Dzlog
TLSH
T1F7E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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