Overview

overview

8

Static

static

3

O9A.exe

windows10-2004-x64

8

O9A.exe

windows11-21h2-x64

8

Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    17/06/2026, 04:30

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General

  • Target
    O9A.exe
  • Size 90KB
  • Sample260617-e4t9rsaw2q
  • SHA256 c86ba08ead6f7fb8d394718f227cb7167573a15d6a51cacfa9d07a65372bc33a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
bootkitdefense_evasiondiscoveryexploitpersistence

Malware Config

Signatures

  • Drops file in Drivers directory 64 IoCs
  • Manipulates Digital Signatures 4 IoCs

    Attackers can apply techniques such as modifying certain DLL exports to make their binary seem valid.

  • Possible privilege escalation attempt 2 IoCs
    exploit
  • Modifies file permissions 1 TTPs 2 IoCs
    discovery
  • Drops desktop.ini file(s) 40 IoCs
  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

    defense_evasion
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence
  • Drops autorun.inf file 1 TTPs 1 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 64 IoCs
  • Modifies termsrv.dll 1 TTPs 1 IoCs

    Commonly used to allow simultaneous RDP sessions.

  • Drops file in Windows directory 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\O9A.exe
    "C:\Users\Admin\AppData\Local\Temp\O9A.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5068
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c takeown /f C:\Boot /r /d y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4980
      • C:\Windows\system32\takeown.exe
        takeown /f C:\Boot /r /d y
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:5972
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c icacls C:\Windows\System32 /grant administrators:F /t
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4928
      • C:\Windows\system32\icacls.exe
        icacls C:\Windows\System32 /grant administrators:F /t
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:5024
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c rmdir /s /q C:\Windows
      2⤵
      • Drops file in Drivers directory
      • Manipulates Digital Signatures
      • Drops desktop.ini file(s)
      • Drops autorun.inf file
      • Drops file in System32 directory
      • Modifies termsrv.dll
      • Drops file in Windows directory
      PID:5036

Network

        MITRE ATT&CK Enterprise v16

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        Downloads