juko | 14daccebf8fa1e86668dc66b2c3abcc78c8a7e1c7f6641021466f897eba32fbd

General

Target
2026-10-17_5dc5c96a4537a669d0c0bd91385c4cea_elex_wannacry.exe
Size 95KB
Sample261019-eptppacx2r
SHA256 14daccebf8fa1e86668dc66b2c3abcc78c8a7e1c7f6641021466f897eba32fbd
MD5 5dc5c96a4537a669d0c0bd91385c4cea
SHA1 4377e7dbd20263bf63e2343a6a0b2477ff93443b
SHA512 2f79adb08243f21e324d5e196c6abd7aae22f42a150f9a566fccb845aa1aab840c13fa65cfa6633fd9fe28a2151d74899a9917de5d76191eb398da221ef18a6b
SSDEEP 1536:JLsF2Kerc64sTiX2IV0DXJrdShIPoANJLlAXuSXv+qSFEAeOFNf:JLy2Kerc64CiGIm7JrshIPFJRAhP2EAb
TLSH
T1EE93CF167B986052D88A0470CA7F4F3584397C791426E213B3D27A1F2DB2A52EF73ADD
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 7 IoCs

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/files/0x00080000000187c7-4.dat	family_juko
behavioral2/memory/4788-9-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/memory/4320-12-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/files/0x001c00000001c570-13.dat	family_juko
behavioral2/memory/6024-16-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/memory/6024-17-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4320	WINWORD.exe
6024	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-1-5-21-4154726816-2055034831-2297277433-1000\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
4804	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	2026-10-17_5dc5c96a4537a669d0c0bd91385c4cea_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
1820	PING.EXE
4888	PING.EXE
4020	PING.EXE
4804	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4888	PING.EXE
4020	PING.EXE
1820	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 4320	4788	2026-10-17_5dc5c96a4537a669d0c0bd91385c4cea_elex_wannacry.exe	88
PID 4320 wrote to memory of 4804	4320	WINWORD.exe	89
PID 4804 wrote to memory of 1820	4804	cmd.exe	91
PID 4804 wrote to memory of 4888	4804	cmd.exe	92
PID 4804 wrote to memory of 4020	4804	cmd.exe	93
PID 4804 wrote to memory of 6024	4804	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-10-17_5dc5c96a4537a669d0c0bd91385c4cea_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-17_5dc5c96a4537a669d0c0bd91385c4cea_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4788
- 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:4320
- - 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\00006AFF" 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:4804
  - - 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:1820
  - - 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:4888
  - - 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:4020
  - - 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:6024

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

Replay Monitor

Loading Replay Monitor...

Downloads

00006AFF

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006AFF
Size 95KB
SHA256 2f291f84fdcb67fc30daf2c1455a37681c823a6b49cdfb6d751b7fbb18e92a06
MD5 259624d8bd101e450b666d5711ddaf34
SHA1 a2d48880f14d44c5f4c6595a42b2482e24befc85
SHA512 14d40584888ed0c7d7e2319393f49c67de2c9e97f6a5dcd674383cd7934942c9720bc758dd33b5c20361557c3e80948666ea73e95ab3dea42b778ad5581f9610
SSDEEP 1536:JLsF2Kerc64sTiX2IV0DXJrdShIPoANJLlAXuSXv+qSFEAeOFN5:JLy2Kerc64CiGIm7JrshIPFJRAhP2EAV
TLSH
T1D893CF167B986052D88A0470CA7F4F3584397C791426E213B3D27A1F2DB2A52EF73ADD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 95KB
SHA256 14daccebf8fa1e86668dc66b2c3abcc78c8a7e1c7f6641021466f897eba32fbd
MD5 5dc5c96a4537a669d0c0bd91385c4cea
SHA1 4377e7dbd20263bf63e2343a6a0b2477ff93443b
SHA512 2f79adb08243f21e324d5e196c6abd7aae22f42a150f9a566fccb845aa1aab840c13fa65cfa6633fd9fe28a2151d74899a9917de5d76191eb398da221ef18a6b
SSDEEP 1536:JLsF2Kerc64sTiX2IV0DXJrdShIPoANJLlAXuSXv+qSFEAeOFNf:JLy2Kerc64CiGIm7JrshIPFJRAhP2EAb
TLSH
T1EE93CF167B986052D88A0470CA7F4F3584397C791426E213B3D27A1F2DB2A52EF73ADD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4320-12-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/4788-0-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/4788-9-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/6024-16-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/6024-17-0x0000000000400000-0x000000000042B000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads