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main.go
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main.go
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package main
import (
"embed"
"flag"
"fmt"
"os"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
yara "github.com/hillu/go-yara/v4"
)
//go:embed db
var ConfigPath embed.FS
func GetConf(yaml *yara.Compiler) int {
var count =0
entries, _ := ConfigPath.ReadDir("db")
for _, one := range entries {
path := one.Name()
if strings.HasSuffix(path, ".yar") {
yamlFile, err := ConfigPath.ReadFile("db/"+path)
if err != nil {
continue
}
if err = yaml.AddString(string(yamlFile), ""); err != nil {
continue
}
count+=1
}
}
return count
}
func main() {
filePtr := flag.String("file", "", "the file to scan")
dirPtr := flag.String("dir", "", "the directory to scan")
cpuPtr := flag.Int("cpu", 30, "the maximum number of CPUs to use 10-100")
scanRecuPtr := flag.Uint64("scan_recu", 10, "the maximum recursion depth for directory scanning default 5 max 20")
// 解析命令行参数
flag.Parse()
// 获取参数值
file := *filePtr
dir := *dirPtr
cpu := *cpuPtr
scanRecu := *scanRecuPtr
//开始时间
startTime := time.Now()
//写一个cgroups 限制CPU 函数
pid := os.Getpid()
//创建一个新的cgroup,限制当前进程使用10%的CPU资源
control, err := createCgroupWithCPULimit(pid, cpu)
if err != nil {
fmt.Printf("Error: %v\n", err)
os.Exit(1)
}
//确保在程序结束时删除cgroup
defer control.Delete()
//获取参数
//file := os.Args[1]
//判断这个是文件还是目录
var flags bool
// 文件和目录都没有输入的时候
if file == "" && dir == "" {
fmt.Println("file and dir is empty")
//展示帮助
os.Exit(1)
}
// 文件和目录只能选择一个
if file != "" && dir != "" {
fmt.Println("file and dir can only choose one")
os.Exit(1)
}
if file!=""{
_, err := os.Stat(file)
if err != nil {
fmt.Println("file not found")
os.Exit(1)
}
flags=true
}else if dir!=""{
_, err := os.Stat(dir)
if err != nil {
fmt.Println("dir not found")
os.Exit(1)
}
flags=false
file=dir
}else{
fmt.Println("file or dir not found")
os.Exit(1)
}
c, err := yara.NewCompiler()
if c == nil || err != nil {
return
}
ConfCount:=GetConf(c)
if ConfCount==0{
fmt.Println("no config")
return
}
rules, err := c.GetRules()
if err != nil {
fmt.Println("err2",err)
return
}
s, err := yara.NewScanner(rules)
if err != nil {
fmt.Println("err3",err)
return
}
var m yara.MatchRules
fileChan := make(chan string,1024 * 1024)
var wg sync.WaitGroup
wg.Add(1)
go func(flags bool,file_path string) {
defer wg.Done()
defer close(fileChan)
if flags {
// scan file
fileInfo, err := os.Stat(file_path)
if err != nil {
return
}
if fileInfo.Mode()&os.ModeSymlink != 0{
return
}
if fileInfo.Mode()&os.ModeDevice != 0{
return
}
if fileInfo.Mode().IsRegular() {
fileChan <- file_path
}
}else {
walk(int(scanRecu),file_path, 0, func(path string, info os.FileInfo, err error) error {
if err != nil {
return nil
}
if info.IsDir() {
return nil
}
if info.Mode()&os.ModeSymlink != 0{
return nil
}
if info.Mode()&os.ModeDevice != 0{
return nil
}
if info.Size()<10{
return nil
}
ext := strings.ToLower(filepath.Ext(path))
if _, ok := SKIP_SUFFIX[ext]; ok {
return nil
}
if SCAN_DIR_FILTER[path] {
return filepath.SkipDir
}
if len(fileChan) >= 1024 * 1024 {
//退出当前线程
runtime.Goexit()
}
fileChan <- path
return nil
})
}
}(flags,file)
wg.Wait()
fileChanLen := len(fileChan)
fmt.Println("通道内多少長度",fileChanLen)
time.Sleep(time.Millisecond*500)
wg.Add(1)
go func() {
defer wg.Done()
for path := range fileChan {
func(path string) {
if err := s.SetCallback(&m).ScanFile(path); err != nil {
return
}
if len(m) > 0 {
//写入到文件中
//fmt.Println("木马文件 : ",path)
for _, rule := range m {
fmt.Println("木马文件:",path,"规则名称 : ",rule.Rule)
break
//fmt.Println(rule.Rule)
}
m = nil
}
}(path)
}
}()
wg.Wait()
//获取通道中的长度
fmt.Println("Scan completed.")
//结束时间
endTime := time.Now()
//计算耗时
costTime := endTime.Sub(startTime)
fmt.Println("costTime",costTime)
}