juko | 5eda884a2993404c8d8971fa0e7f52eda083213ea6422d4ea7be48b0b061835a

General

Target
2026-10-02_38602bcf8056dcaf3f5f35f097ebea1b_elex_wannacry.exe
Size 69KB
Sample261003-rt3vdazhpf
SHA256 5eda884a2993404c8d8971fa0e7f52eda083213ea6422d4ea7be48b0b061835a
MD5 38602bcf8056dcaf3f5f35f097ebea1b
SHA1 7ec8867802e3906a63201368fae05b6a92f363ed
SHA512 83969b6156c1c30437879b5eaccabae2bd8283eeaa79e7af5dc5df64794a46aa8a9de23e3825795c1bfab09e38d56d8f027b7a5cee67e469894c67841189e615
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9i:tLy2Kerc64CiGIm1K851YOhqYBwEM9i
TLSH
T16563070737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
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/0x000700000001b86a-2.dat	family_juko
behavioral2/files/0x000f00000001c523-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3868	WINWORD.exe
2760	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-1-5-21-4057491610-3392471755-192832105-1000\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
2620	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-02_38602bcf8056dcaf3f5f35f097ebea1b_elex_wannacry.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
4572	PING.EXE
4852	PING.EXE
5108	PING.EXE
2620	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4572	PING.EXE
4852	PING.EXE
5108	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 3868	2352	2026-10-02_38602bcf8056dcaf3f5f35f097ebea1b_elex_wannacry.exe	90
PID 3868 wrote to memory of 2620	3868	WINWORD.exe	91
PID 2620 wrote to memory of 4572	2620	cmd.exe	93
PID 2620 wrote to memory of 4852	2620	cmd.exe	94
PID 2620 wrote to memory of 5108	2620	cmd.exe	95
PID 2620 wrote to memory of 2760	2620	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-10-02_38602bcf8056dcaf3f5f35f097ebea1b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-02_38602bcf8056dcaf3f5f35f097ebea1b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2352
- 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:3868
- - 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\00005AA7" 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:2620
  - - 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:4572
  - - 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:4852
  - - 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:5108
  - - 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:2760

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

00005AA7

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005AA7
Size 69KB
SHA256 9b9f300499751d85b14748a026c21538002350369cd4a069d75fccf9f41e21a2
MD5 797bcc0822313ac90b309458a9dee5bc
SHA1 a1917bc06e23368646c9338bab885d6df526178e
SHA512 04acf1c9d292ef1c28effe2d60e2786e1c8ae47e0a807824c67bf901c637e853cf817583dd71f32bb644f8189aa5ab548115c2a03365c3722afe9b3997cec59c
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9J:tLy2Kerc64CiGIm1K851YOhqYBwEM9J
TLSH
T1B563F70737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 69KB
SHA256 5eda884a2993404c8d8971fa0e7f52eda083213ea6422d4ea7be48b0b061835a
MD5 38602bcf8056dcaf3f5f35f097ebea1b
SHA1 7ec8867802e3906a63201368fae05b6a92f363ed
SHA512 83969b6156c1c30437879b5eaccabae2bd8283eeaa79e7af5dc5df64794a46aa8a9de23e3825795c1bfab09e38d56d8f027b7a5cee67e469894c67841189e615
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9i:tLy2Kerc64CiGIm1K851YOhqYBwEM9i
TLSH
T16563070737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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