juko | d226077976602aca9927209f5b6fb5e45b061826eb2290f697a7a92dd189da47

General

Target
2026-08-02_47707be4f2fe0a10096f010e98c6e7ec_elex_wannacry.exe
Size 88KB
Sample260802-nw71bshe29
SHA256 d226077976602aca9927209f5b6fb5e45b061826eb2290f697a7a92dd189da47
MD5 47707be4f2fe0a10096f010e98c6e7ec
SHA1 cf8cb4f0a9b3d3f9ecd9a5b26683f53ef13e2008
SHA512 7474a4d815931ff52069723a94f047d6f1612de0bb8cdfda7393979a85270aa4d9df29cf3b41e263a5445981943f77809643a5a95304ae7ac4ef5f2d3d2f52df
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrs5:sLy2Kerc64CiGIm8so28wzCBlycJWee6
TLSH
T198933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
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 2 IoCs

resource	yara_rule
behavioral2/files/0x0009000000019ce0-4.dat	family_juko
behavioral2/files/0x000e00000001c549-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1560	WINWORD.exe
1028	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-1-5-21-552508041-2681165170-3229858294-1000\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
2712	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	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	2026-08-02_47707be4f2fe0a10096f010e98c6e7ec_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
3304	PING.EXE
3300	PING.EXE
2712	cmd.exe
5824	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5824	PING.EXE
3304	PING.EXE
3300	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4512 wrote to memory of 1560	4512	2026-08-02_47707be4f2fe0a10096f010e98c6e7ec_elex_wannacry.exe	89
PID 1560 wrote to memory of 2712	1560	WINWORD.exe	90
PID 2712 wrote to memory of 5824	2712	cmd.exe	92
PID 2712 wrote to memory of 3304	2712	cmd.exe	93
PID 2712 wrote to memory of 3300	2712	cmd.exe	94
PID 2712 wrote to memory of 1028	2712	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-02_47707be4f2fe0a10096f010e98c6e7ec_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_47707be4f2fe0a10096f010e98c6e7ec_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4512
- 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:1560
- - 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\000019AC" 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:2712
  - - 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:5824
  - - 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:3304
  - - 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:3300
  - - 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:1028

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

000019AC

Path C:\Users\Admin\AppData\Roaming\Mozilla\000019AC
Size 88KB
SHA256 a487b5fc9aea29d59099bbda82aaa9ab26867a6220085349f67908cc19c80096
MD5 ba581b6bc9b672d316dc7566c04fbd16
SHA1 86c5aec136bf90866a2f46d1481359f100f65208
SHA512 c7a3b6171b2b17442562fbebb61bb5ba9d7a046c3be9d91e7db681906b6060ad7ad69b678cae827eb3e26da0244abe8aa11868cafe1a4680137c856e1e6536bb
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsL:sLy2Kerc64CiGIm8so28wzCBlycJWees
TLSH
T11B933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 d226077976602aca9927209f5b6fb5e45b061826eb2290f697a7a92dd189da47
MD5 47707be4f2fe0a10096f010e98c6e7ec
SHA1 cf8cb4f0a9b3d3f9ecd9a5b26683f53ef13e2008
SHA512 7474a4d815931ff52069723a94f047d6f1612de0bb8cdfda7393979a85270aa4d9df29cf3b41e263a5445981943f77809643a5a95304ae7ac4ef5f2d3d2f52df
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrs5:sLy2Kerc64CiGIm8so28wzCBlycJWee6
TLSH
T198933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
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