juko | 21899d4df78c7aa1bc2d6e2731f029c1e149bb6da873b5147d33302dbb73aec0

General

Target
2026-05-06_e00a9676f4a44fae1c643bc8c916e536_elex_wannacry.exe
Size 53KB
Sample260506-papsashx6v
SHA256 21899d4df78c7aa1bc2d6e2731f029c1e149bb6da873b5147d33302dbb73aec0
MD5 e00a9676f4a44fae1c643bc8c916e536
SHA1 225e050b62635bfc76388ba5bff6192decae47e6
SHA512 db9f9bc05264d523d6e58d62013c2e8c7478d457fc95af19a1580d13ee3ed724030febd14b51ecd5856e0adeecd1d05ecc3c9fb76a1235630d1b102ff88534db
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2C:3Ly2Kerc64CiGIm1tcBMUOOFC
TLSH
T1B1335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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/0x000900000002a117-4.dat	family_juko
behavioral2/files/0x001d00000002b3e4-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5584	WINWORD.exe
3812	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-1-5-21-1456842261-3464001825-2855069093-1000\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	2026-05-06_e00a9676f4a44fae1c643bc8c916e536_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
4956	cmd.exe
3392	PING.EXE
2328	PING.EXE
6016	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3392	PING.EXE
2328	PING.EXE
6016	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 5584	2376	2026-05-06_e00a9676f4a44fae1c643bc8c916e536_elex_wannacry.exe	79
PID 5584 wrote to memory of 4956	5584	WINWORD.exe	80
PID 4956 wrote to memory of 3392	4956	cmd.exe	82
PID 4956 wrote to memory of 2328	4956	cmd.exe	83
PID 4956 wrote to memory of 6016	4956	cmd.exe	84
PID 4956 wrote to memory of 3812	4956	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-06_e00a9676f4a44fae1c643bc8c916e536_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-06_e00a9676f4a44fae1c643bc8c916e536_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2376
- 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:5584
- - 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\000060C0" 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:4956
  - - 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:3392
  - - 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:2328
  - - 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:6016
  - - 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:3812

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

000060C0

Path C:\Users\Admin\AppData\Roaming\Mozilla\000060C0
Size 53KB
SHA256 7b15cf5699d2853c91c41c7095567737b98e8926ebf62d980cd87e00ce3e9650
MD5 ffb85b53a538756a6707888d8d05dbee
SHA1 0d27c5a5aed7ce97e84f729b79a975e4592d7ade
SHA512 c79c59116a8d385516aab8e454b5a7fe4f143ebd870d7854a4634b4a826d34dbf37eef6e76928a00cd3648f9fb5340b75871d6c9614cf55937325a2d43a9a9f8
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2A:3Ly2Kerc64CiGIm1tcBMUOOFA
TLSH
T1C0335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 53KB
SHA256 21899d4df78c7aa1bc2d6e2731f029c1e149bb6da873b5147d33302dbb73aec0
MD5 e00a9676f4a44fae1c643bc8c916e536
SHA1 225e050b62635bfc76388ba5bff6192decae47e6
SHA512 db9f9bc05264d523d6e58d62013c2e8c7478d457fc95af19a1580d13ee3ed724030febd14b51ecd5856e0adeecd1d05ecc3c9fb76a1235630d1b102ff88534db
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2C:3Ly2Kerc64CiGIm1tcBMUOOFC
TLSH
T1B1335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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