juko | df363ac513ce5c1f7f3132e5e0a0ee5129302c6e20e1e8ac0494bf88da6f97f5

General

Target
2026-10-29_11a61a26ff57541f73041d963c8443e9_elex_wannacry.exe
Size 133KB
Sample261029-vsj8esew6j
SHA256 df363ac513ce5c1f7f3132e5e0a0ee5129302c6e20e1e8ac0494bf88da6f97f5
MD5 11a61a26ff57541f73041d963c8443e9
SHA1 b1b265e67c235bb0a0d528f90993361efe670baa
SHA512 eaa687d179f191024f80e6fe4262403fbfedfa5b8b5bbbd972df13c86e812568b1058415c98ca42f3c579e6d0f33f0778fda3ce8815f756a3fffa8ff4e21fc85
SSDEEP 3072:bLy2Kerc64CiGImIX9UQpx7NQ/zc2cQgVI:bLy2Kwc64YIF3gk6
TLSH
T1B1D32818A7F40135EAB74B70FDF1145286B3BD172E26DA6C1A85368D0933B41CA72B6B
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/0x000900000001b850-3.dat	family_juko
behavioral2/files/0x001100000001c45b-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4484	WINWORD.exe
5324	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-1-5-21-2304238888-3968896904-642854331-1000\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
940	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-29_11a61a26ff57541f73041d963c8443e9_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

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
3216	PING.EXE
3364	PING.EXE
1300	PING.EXE
940	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3216	PING.EXE
3364	PING.EXE
1300	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3456 wrote to memory of 4484	3456	2026-10-29_11a61a26ff57541f73041d963c8443e9_elex_wannacry.exe	89
PID 4484 wrote to memory of 940	4484	WINWORD.exe	90
PID 940 wrote to memory of 3216	940	cmd.exe	92
PID 940 wrote to memory of 3364	940	cmd.exe	93
PID 940 wrote to memory of 1300	940	cmd.exe	94
PID 940 wrote to memory of 5324	940	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-29_11a61a26ff57541f73041d963c8443e9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-29_11a61a26ff57541f73041d963c8443e9_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3456
- 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:4484
- - 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\0000196D" 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:940
  - - 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:3216
  - - 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:3364
  - - 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:1300
  - - 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:5324

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

0000196D

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000196D
Size 133KB
SHA256 3be85c2b71a996604994415e693d95ffcff49eefb1da23b6810b80ed68d90ea8
MD5 e3c76bfac1376db84bcf3717e78d7a12
SHA1 ce762c2dcd983e786d8349ab596a8198472d4efc
SHA512 48281d8a14adee87660426ecd1823c81d548cef264114018ee7caae8c284742cb5c51a61170a97c2c3d1011db887862e648ec91bfb86ee0f184e7f1663bd009a
SSDEEP 3072:bLy2Kerc64CiGImIX9UQpx7NQ/zc2cQgV6:bLy2Kwc64YIF3gko
TLSH
T101D32818A7F40135EAB74B70FDF1145286B3BD172E26DA6C1A85378D0933B41CA72B6B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 133KB
SHA256 df363ac513ce5c1f7f3132e5e0a0ee5129302c6e20e1e8ac0494bf88da6f97f5
MD5 11a61a26ff57541f73041d963c8443e9
SHA1 b1b265e67c235bb0a0d528f90993361efe670baa
SHA512 eaa687d179f191024f80e6fe4262403fbfedfa5b8b5bbbd972df13c86e812568b1058415c98ca42f3c579e6d0f33f0778fda3ce8815f756a3fffa8ff4e21fc85
SSDEEP 3072:bLy2Kerc64CiGImIX9UQpx7NQ/zc2cQgVI:bLy2Kwc64YIF3gk6
TLSH
T1B1D32818A7F40135EAB74B70FDF1145286B3BD172E26DA6C1A85368D0933B41CA72B6B
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