Overview

overview

8

Static

static

3

quatra.exe

windows10-2004-x64

8

quatra.exe

windows11-21h2-x64

8

Analysis

  • max time kernel
    125s
  • 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
    16/06/2026, 21:34

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General

  • Target
    quatra.exe
  • Size 89KB
  • Sample260616-1ercgaex5m
  • SHA256 bc88e504c54b3000604e9916e6ddf1b9d61b86b5e8676635574d25338d1d7cad
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
bootkitdiscoveryexploitpersistencespywarestealer

Malware Config

Signatures

  • Drops file in Drivers directory 64 IoCs
  • Manipulates Digital Signatures 2 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
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Drops desktop.ini file(s) 2 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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 Program Files directory 64 IoCs
  • Drops file in Windows directory 64 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

    discovery
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\quatra.exe
    "C:\Users\Admin\AppData\Local\Temp\quatra.exe"
    1⤵
    • Enumerates connected drives
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c takeown /f C:\ /r /d y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3916
      • C:\Windows\system32\takeown.exe
        takeown /f C:\ /r /d y
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        • Suspicious use of AdjustPrivilegeToken
        PID:4000
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c icacls C:\ /grant administrators:F /t
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:396
      • C:\Windows\system32\icacls.exe
        icacls C:\ /grant administrators:F /t
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:3388
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c rd /s /q C:\
      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 Program Files directory
      • Drops file in Windows directory
      PID:3396

Network

        MITRE ATT&CK Enterprise v16

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        Downloads