juko | bdbd88fdc6734ca05c9e3ad4bd017e4ca2fdb9368fa87a68d0e2d865e20393cd

General

Target
2026-11-01_c12d101030b4d979fb2c1aa0d66642ea_elex_wannacry.exe
Size 88KB
Sample261102-lqmfbsef85
SHA256 bdbd88fdc6734ca05c9e3ad4bd017e4ca2fdb9368fa87a68d0e2d865e20393cd
MD5 c12d101030b4d979fb2c1aa0d66642ea
SHA1 da45abda588f430ef0e3bc55f302ca3ba7a8b913
SHA512 c13e6805d212bb13d9916946fac1a31d82aec94716f848506ed8ed2fe2bc2e66dcbafae09e657415b6603c1f94ac2328b7ced609467c9be0196979b1a81e5b65
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsz:sLy2Kerc64CiGIm8so28wzCBlycJWeeA
TLSH
T12D933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
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/0x000d00000001b2f6-3.dat	family_juko
behavioral2/files/0x000f00000001c54a-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2068	WINWORD.exe
5712	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-1-5-21-53044966-3830981193-2402648431-1000\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
4120	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.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	2026-11-01_c12d101030b4d979fb2c1aa0d66642ea_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
4120	cmd.exe
4508	PING.EXE
360	PING.EXE
3132	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4508	PING.EXE
360	PING.EXE
3132	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 2068	4356	2026-11-01_c12d101030b4d979fb2c1aa0d66642ea_elex_wannacry.exe	89
PID 2068 wrote to memory of 4120	2068	WINWORD.exe	90
PID 4120 wrote to memory of 4508	4120	cmd.exe	92
PID 4120 wrote to memory of 360	4120	cmd.exe	93
PID 4120 wrote to memory of 3132	4120	cmd.exe	94
PID 4120 wrote to memory of 5712	4120	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-11-01_c12d101030b4d979fb2c1aa0d66642ea_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-01_c12d101030b4d979fb2c1aa0d66642ea_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4356
- 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:2068
- - 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\0000367E" 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:4120
  - - 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:4508
  - - 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:360
  - - 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:3132
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:5712

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:940

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

0000367E

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000367E
Size 88KB
SHA256 b6a18c83dc2b259ed5735360b24362c34459eec452996f0c934be45c8ac4af28
MD5 ed3544976a7ddc0675d138e8ccba3cff
SHA1 e96d24785bd52440a351c82395382e71279a0b5b
SHA512 9a5d12bb500cbfb36769265287a814eba6457bccfc3140c49bf0800826af76fadfbab78174bc84ab0e3e04a4fee512fb265c2050fc129c1077ce99577b0f604d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsb:sLy2Kerc64CiGIm8so28wzCBlycJWees
TLSH
T1BC933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 bdbd88fdc6734ca05c9e3ad4bd017e4ca2fdb9368fa87a68d0e2d865e20393cd
MD5 c12d101030b4d979fb2c1aa0d66642ea
SHA1 da45abda588f430ef0e3bc55f302ca3ba7a8b913
SHA512 c13e6805d212bb13d9916946fac1a31d82aec94716f848506ed8ed2fe2bc2e66dcbafae09e657415b6603c1f94ac2328b7ced609467c9be0196979b1a81e5b65
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsz:sLy2Kerc64CiGIm8so28wzCBlycJWeeA
TLSH
T12D933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
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