juko | 361382830958bd8db7cef4962b1b75548f7483f6afacad177f4929131256a069

General

Target
2026-07-10_12c0bfa8fc3c39dcb0e70469c35ad5d9_elex_wannacry.exe
Size 30KB
Sample260711-abtejsaw5x
SHA256 361382830958bd8db7cef4962b1b75548f7483f6afacad177f4929131256a069
MD5 12c0bfa8fc3c39dcb0e70469c35ad5d9
SHA1 d48aa68e27b40548ccaf834aa40792570dfb4dfb
SHA512 b8f1c558ed4cf630b9394b45895b700067ad30259ec19d576fb3df74830538a533cdf50b3f4ed65527e65f9377f755bea9db846460cf92e1b9de35217dee89d9
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXM:tLsF2Kerc64sTiX2IV0DzloM
TLSH
T192E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery 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/0x000700000001b867-4.dat	family_juko
behavioral2/files/0x000f00000001c437-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3556	WINWORD.exe
4116	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-1-5-21-1875162379-3804078649-638427191-1000\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

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	2026-07-10_12c0bfa8fc3c39dcb0e70469c35ad5d9_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
3308	PING.EXE
1272	PING.EXE
4632	cmd.exe
5552	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5552	PING.EXE
3308	PING.EXE
1272	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 3556	2432	2026-07-10_12c0bfa8fc3c39dcb0e70469c35ad5d9_elex_wannacry.exe	87
PID 3556 wrote to memory of 4632	3556	WINWORD.exe	88
PID 4632 wrote to memory of 5552	4632	cmd.exe	90
PID 4632 wrote to memory of 3308	4632	cmd.exe	91
PID 4632 wrote to memory of 1272	4632	cmd.exe	92
PID 4632 wrote to memory of 4116	4632	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-10_12c0bfa8fc3c39dcb0e70469c35ad5d9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-10_12c0bfa8fc3c39dcb0e70469c35ad5d9_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2432
- 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:3556
- - 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\00001B9F" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:4632
  - - 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:5552
  - - 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:3308
  - - 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:1272
  - - 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
      System Location Discovery: System Language Discovery
      PID:4116

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00001B9F

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001B9F
Size 30KB
SHA256 f7ffec40cd9adfd086d483ea39f449bd7a55528e35162e912a4dd982c02d8fb2
MD5 64a9ff740e2f94438182d885dfcd95fb
SHA1 f61ac472fe9e3b6cdbeba8044a4295e1fb79b101
SHA512 71131067b740fe0665ea5f4950346e482a150129c6de7948e4ef2347e7409e07b2bdd00e5a419af926b4d2bcac124e787a131bf8e81f89f773e5c0ee47393477
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXl:tLsF2Kerc64sTiX2IV0Dzlol
TLSH
T174E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 361382830958bd8db7cef4962b1b75548f7483f6afacad177f4929131256a069
MD5 12c0bfa8fc3c39dcb0e70469c35ad5d9
SHA1 d48aa68e27b40548ccaf834aa40792570dfb4dfb
SHA512 b8f1c558ed4cf630b9394b45895b700067ad30259ec19d576fb3df74830538a533cdf50b3f4ed65527e65f9377f755bea9db846460cf92e1b9de35217dee89d9
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXM:tLsF2Kerc64sTiX2IV0DzloM
TLSH
T192E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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