juko | 2fbfd17e409145ac5b74a88da9c46b456419e205a45d29afb13153f70f85e6e9

General

Target
2026-08-11_d469f40e4b72d924f1b218739630c7a3_elex_wannacry.exe
Size 64KB
Sample260811-n6345aeb79
SHA256 2fbfd17e409145ac5b74a88da9c46b456419e205a45d29afb13153f70f85e6e9
MD5 d469f40e4b72d924f1b218739630c7a3
SHA1 1ae2e8f5e1759939c0a50e1d60f289920f38dcdb
SHA512 a48a4aa9002893c8d4e8c7284b8fa8c51b4a8660404551f58a23927050cd9dda8c228a949d480a6daa735ab437b28090d7edfd898583f67e3369110f805e856a
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/un:sLy2Kerc64CiGIm8so28n
TLSH
T1E7535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x000e00000001c467-4.dat	family_juko
behavioral2/files/0x000e00000001c46b-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4252	WINWORD.exe
2084	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-1-5-21-2301830172-776172150-2531349243-1000\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
4588	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	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	2026-08-11_d469f40e4b72d924f1b218739630c7a3_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

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
4588	cmd.exe
5044	PING.EXE
3816	PING.EXE
3060	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5044	PING.EXE
3816	PING.EXE
3060	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5896 wrote to memory of 4252	5896	2026-08-11_d469f40e4b72d924f1b218739630c7a3_elex_wannacry.exe	89
PID 4252 wrote to memory of 4588	4252	WINWORD.exe	90
PID 4588 wrote to memory of 5044	4588	cmd.exe	92
PID 4588 wrote to memory of 3816	4588	cmd.exe	93
PID 4588 wrote to memory of 3060	4588	cmd.exe	94
PID 4588 wrote to memory of 2084	4588	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-11_d469f40e4b72d924f1b218739630c7a3_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-11_d469f40e4b72d924f1b218739630c7a3_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5896
- 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:4252
- - 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\00006828" 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:4588
  - - 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:5044
  - - 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:3816
  - - 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:3060
  - - 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:2084

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

Replay Monitor

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Downloads

00006828

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006828
Size 64KB
SHA256 a6c00da4b4c9c1a0fadc88c759959a1bbb0ac77bbdfef3e632bc236fdf3611fe
MD5 d1e2adc3d103df8593ccc5317f50d283
SHA1 1915d90ddb91c2f769c0c6079a6c4b1023161c41
SHA512 9c04c40a1efbb9a1627532d15722ccf1cb17a7d4cde73f3cbe730eb88b6b889f40bceb567c630b1e0d5caab64aa1cc3d4a0b36c104a9d5a7105059e68f0780c4
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ud:sLy2Kerc64CiGIm8so28d
TLSH
T1AA535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 2fbfd17e409145ac5b74a88da9c46b456419e205a45d29afb13153f70f85e6e9
MD5 d469f40e4b72d924f1b218739630c7a3
SHA1 1ae2e8f5e1759939c0a50e1d60f289920f38dcdb
SHA512 a48a4aa9002893c8d4e8c7284b8fa8c51b4a8660404551f58a23927050cd9dda8c228a949d480a6daa735ab437b28090d7edfd898583f67e3369110f805e856a
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/un:sLy2Kerc64CiGIm8so28n
TLSH
T1E7535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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