juko | 60749bf5948f517deeb5959a658e690b4a7d7ef9ddc1ce092516ec32c3e30683

General

Target
2026-05-06_2f04f9d47c785d44b063e88244b475e8_elex_wannacry.exe
Size 64KB
Sample260506-jdl8pagx4p
SHA256 60749bf5948f517deeb5959a658e690b4a7d7ef9ddc1ce092516ec32c3e30683
MD5 2f04f9d47c785d44b063e88244b475e8
SHA1 330fe3b472d3abd779cb4135690e55bc440d06a2
SHA512 06484dadfbe8aeec55722f012157d4b2ccadfaab72eaa1cd83fcdadd5a08c2d3899b78bf8d3b88fba3643ae3ab11b544ffdfd772bf1f6de48115d02f0033cf77
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/up:sLy2Kerc64CiGIm8so28p
TLSH
T1D4535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x000900000001047d-4.dat	family_juko
behavioral2/files/0x001d00000002b256-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3184	WINWORD.exe
2076	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-1-5-21-3847269522-1618051987-1942096715-1000\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	2026-05-06_2f04f9d47c785d44b063e88244b475e8_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.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
5000	cmd.exe
4092	PING.EXE
4824	PING.EXE
2536	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4092	PING.EXE
4824	PING.EXE
2536	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4444 wrote to memory of 3184	4444	2026-05-06_2f04f9d47c785d44b063e88244b475e8_elex_wannacry.exe	80
PID 3184 wrote to memory of 5000	3184	WINWORD.exe	81
PID 5000 wrote to memory of 4092	5000	cmd.exe	83
PID 5000 wrote to memory of 4824	5000	cmd.exe	84
PID 5000 wrote to memory of 2536	5000	cmd.exe	85
PID 5000 wrote to memory of 2076	5000	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-06_2f04f9d47c785d44b063e88244b475e8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-06_2f04f9d47c785d44b063e88244b475e8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4444
- 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:3184
- - 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\00004154" 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:5000
  - - 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:4092
  - - 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:4824
  - - 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:2536
  - - 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:2076

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

00004154

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004154
Size 64KB
SHA256 73fed536950459cff5c9041f976dbaf98ea99443a00b0a31d21967738fba7337
MD5 117e28323d350236641e5d4d04ed2fd5
SHA1 a5d456b61f0c8c9fc944f7cff216f349682a84b6
SHA512 3b361c858b9018725ffb5c3cca6bb10b39dedecb543e910deae3a3cade1bb775358047483f35d19167243a1e83e5c76f8ff03481fe44baee37eca2c76a9d71c2
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ur:sLy2Kerc64CiGIm8so28r
TLSH
T120535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 60749bf5948f517deeb5959a658e690b4a7d7ef9ddc1ce092516ec32c3e30683
MD5 2f04f9d47c785d44b063e88244b475e8
SHA1 330fe3b472d3abd779cb4135690e55bc440d06a2
SHA512 06484dadfbe8aeec55722f012157d4b2ccadfaab72eaa1cd83fcdadd5a08c2d3899b78bf8d3b88fba3643ae3ab11b544ffdfd772bf1f6de48115d02f0033cf77
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/up:sLy2Kerc64CiGIm8so28p
TLSH
T1D4535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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