juko | b38884975f19baa4370f0692287fac611e00506dc43fdf51b40d5d6b54631b06

General

Target
2026-06-30_1b612cb064d937461083afc265725c0e_elex_wannacry.exe
Size 42KB
Sample260701-apm5pabs2n
SHA256 b38884975f19baa4370f0692287fac611e00506dc43fdf51b40d5d6b54631b06
MD5 1b612cb064d937461083afc265725c0e
SHA1 85b0dc08e0e9337ac85ea9c2807226fb786a5be2
SHA512 f3ecb94b155d5ea644b581db70a36ed7390c047dcd5e3139fd1ef46fb1da024619f79322464f0b7411bb499958398b8f28874aec8bed7cfc6d62eca7323a52a4
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41Z:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+u
TLSH
T12713171776A460D2CDB76074E91A4E30437E9CF664A7B317A72076202DB3D5ACFA02CE
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/0x000b00000001b8c8-4.dat	family_juko
behavioral2/files/0x000f00000001c592-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2816	WINWORD.exe
2860	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-1-5-21-1749168396-1890032557-311772428-1000\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	2026-06-30_1b612cb064d937461083afc265725c0e_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
3708	PING.EXE
2884	PING.EXE
5960	cmd.exe
5688	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2884	PING.EXE
5688	PING.EXE
3708	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4224 wrote to memory of 2816	4224	2026-06-30_1b612cb064d937461083afc265725c0e_elex_wannacry.exe	88
PID 2816 wrote to memory of 5960	2816	WINWORD.exe	89
PID 5960 wrote to memory of 5688	5960	cmd.exe	91
PID 5960 wrote to memory of 3708	5960	cmd.exe	92
PID 5960 wrote to memory of 2884	5960	cmd.exe	93
PID 5960 wrote to memory of 2860	5960	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-06-30_1b612cb064d937461083afc265725c0e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-30_1b612cb064d937461083afc265725c0e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4224
- 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:2816
- - 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\0000498C" 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:5960
  - - 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:5688
  - - 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:3708
  - - 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:2884
  - - 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:2860

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

0000498C

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000498C
Size 42KB
SHA256 057e1da5e086e47c987fc98dea8094cb692316eca963cc34607916ed9931a308
MD5 7a9bba03e4bffa5b1bcf0debbd11af0a
SHA1 fe57b5b97625edca4ae6ab7ab2596c05a6d7bc03
SHA512 9615f010db8d03e286052707cd4771da345d864e4d2344a1c4fef14a5875040b45117799ae179cc9e8220425f0b940ed28059abb1cdd338c5f1e93c36215581f
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41F:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+C
TLSH
T16913171776A460D2CDB76074E91A4E30437E9CF664A7B317A72076202DB3D5ACFA02CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 42KB
SHA256 b38884975f19baa4370f0692287fac611e00506dc43fdf51b40d5d6b54631b06
MD5 1b612cb064d937461083afc265725c0e
SHA1 85b0dc08e0e9337ac85ea9c2807226fb786a5be2
SHA512 f3ecb94b155d5ea644b581db70a36ed7390c047dcd5e3139fd1ef46fb1da024619f79322464f0b7411bb499958398b8f28874aec8bed7cfc6d62eca7323a52a4
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41Z:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+u
TLSH
T12713171776A460D2CDB76074E91A4E30437E9CF664A7B317A72076202DB3D5ACFA02CE
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