juko | 3c65227841da77bfa7cdc6ea65350a3999cf5ad91e3abeb3c94d5ad1ac3bc3c3

General

Target
2026-08-01_978be79208d95615bb128db4b04424d5_elex_wannacry.exe
Size 32KB
Sample260802-empyqatgrb
SHA256 3c65227841da77bfa7cdc6ea65350a3999cf5ad91e3abeb3c94d5ad1ac3bc3c3
MD5 978be79208d95615bb128db4b04424d5
SHA1 7f97d7af389cb89fae153e54392d264f82736ef7
SHA512 639ce066190792211e679f56e124c8d7772c2e72f9b782ea0748954d504ee0ee686c8024bdafeb20ac06513ab7162c06e488c6131a598a0189ab2264d628a0af
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbfC:tLsF2Kerc64sTiX2IV0DYQK
TLSH
T1FFE22A2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
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/0x000c00000001b315-4.dat	family_juko
behavioral2/files/0x000e00000001c527-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4208	WINWORD.exe
4088	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

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
956	cmd.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	2026-08-01_978be79208d95615bb128db4b04424d5_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

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
956	cmd.exe
2144	PING.EXE
2484	PING.EXE
4844	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2144	PING.EXE
2484	PING.EXE
4844	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 4208	2560	2026-08-01_978be79208d95615bb128db4b04424d5_elex_wannacry.exe	89
PID 4208 wrote to memory of 956	4208	WINWORD.exe	90
PID 956 wrote to memory of 2144	956	cmd.exe	92
PID 956 wrote to memory of 2484	956	cmd.exe	93
PID 956 wrote to memory of 4844	956	cmd.exe	94
PID 956 wrote to memory of 4088	956	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-01_978be79208d95615bb128db4b04424d5_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-01_978be79208d95615bb128db4b04424d5_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2560
- 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:4208
- - 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\0000119D" 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:956
  - - 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:2144
  - - 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:2484
  - - 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:4844
  - - 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:4088

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

0000119D

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000119D
Size 32KB
SHA256 b1d1a8ae3911899d1663ac96031373063d5a45234090e9195596c3a99f7a98eb
MD5 2991c365ff41c9823df68a649cb8c33f
SHA1 b29cbd77cd86df7215e9102041d0f5196e2cca25
SHA512 e3cd0ead0860d752bf1619811f0bf2d9d55183616363265e017414cd990d4bd1f195ae4ff0f8b5f8522514d7a169d792f81c5eddf16a2661b845623cc882fd47
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbft:tLsF2Kerc64sTiX2IV0DYQF
TLSH
T10AE23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 3c65227841da77bfa7cdc6ea65350a3999cf5ad91e3abeb3c94d5ad1ac3bc3c3
MD5 978be79208d95615bb128db4b04424d5
SHA1 7f97d7af389cb89fae153e54392d264f82736ef7
SHA512 639ce066190792211e679f56e124c8d7772c2e72f9b782ea0748954d504ee0ee686c8024bdafeb20ac06513ab7162c06e488c6131a598a0189ab2264d628a0af
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbfC:tLsF2Kerc64sTiX2IV0DYQK
TLSH
T1FFE22A2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
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