juko | d22f106e3c9081758e773415ad1dd2d270b7984da1f668d0a8191a8975f72f44

General

Target
2026-10-08_0049ae34d1f3acfcd4362bfe1c393077_elex_wannacry.exe
Size 47KB
Sample261009-2gr78aft9y
SHA256 d22f106e3c9081758e773415ad1dd2d270b7984da1f668d0a8191a8975f72f44
MD5 0049ae34d1f3acfcd4362bfe1c393077
SHA1 68b3f176db739c8169d284d996fd0514d0523e1d
SHA512 a644f4b4464ce1f5bc1a32265eb33a4b37fca53138ff3f24c25c5d0dad4ba07d93088cc2be8f9a11f5e234d4aa594e782db1c16e662947ab3e20842273aa78cc
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX67:ALsF2Kerc64sTiX2IV0DZZTo7
TLSH
T1EB235A1BFE616052C19611B0FD699F3585799CB4047BB162B780BB1D28B2DA3CF709CD
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/0x0011000000011392-3.dat	family_juko
behavioral2/files/0x0006000000016d01-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1088	WINWORD.exe
1668	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-1-5-21-650287814-2715975232-1279715623-1000\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
5384	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	2026-10-08_0049ae34d1f3acfcd4362bfe1c393077_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
5384	cmd.exe
3632	PING.EXE
3020	PING.EXE
4324	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3020	PING.EXE
4324	PING.EXE
3632	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4848 wrote to memory of 1088	4848	2026-10-08_0049ae34d1f3acfcd4362bfe1c393077_elex_wannacry.exe	89
PID 1088 wrote to memory of 5384	1088	WINWORD.exe	90
PID 5384 wrote to memory of 3632	5384	cmd.exe	92
PID 5384 wrote to memory of 3020	5384	cmd.exe	93
PID 5384 wrote to memory of 4324	5384	cmd.exe	94
PID 5384 wrote to memory of 1668	5384	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-08_0049ae34d1f3acfcd4362bfe1c393077_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-08_0049ae34d1f3acfcd4362bfe1c393077_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4848
- 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:1088
- - 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\00007E0B" 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:5384
  - - 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:3632
  - - 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:3020
  - - 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:4324
  - - 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:1668

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

00007E0B

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007E0B
Size 47KB
SHA256 225a0991914d707bcd9315b8223204bafb3efd2de7880816ceb8bcee111ddb7d
MD5 31885c183f27d423e12772b6bc17fb2b
SHA1 cd1d386d68ec95e8378620c6cbca9f05849c2fa8
SHA512 9eca9235739f2964cd9592c427f36897e12be5bbda23fdd69e0609bc05aa0117abfc48209902778327b1caea3de322db51bc87793307c480be1999aa0be4c017
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX6B:ALsF2Kerc64sTiX2IV0DZZToB
TLSH
T1AA235A1BFE616052C19611B0FD699F3585799CB4047BB162B780BB1D28B2DA3CF709CD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 47KB
SHA256 d22f106e3c9081758e773415ad1dd2d270b7984da1f668d0a8191a8975f72f44
MD5 0049ae34d1f3acfcd4362bfe1c393077
SHA1 68b3f176db739c8169d284d996fd0514d0523e1d
SHA512 a644f4b4464ce1f5bc1a32265eb33a4b37fca53138ff3f24c25c5d0dad4ba07d93088cc2be8f9a11f5e234d4aa594e782db1c16e662947ab3e20842273aa78cc
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX67:ALsF2Kerc64sTiX2IV0DZZTo7
TLSH
T1EB235A1BFE616052C19611B0FD699F3585799CB4047BB162B780BB1D28B2DA3CF709CD
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