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19 changed files with 38 additions and 71 deletions

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@ -1,5 +1,7 @@
# pancap # pancap
<img alt="pancap logo" src="pancap.png" width="250px" height="250px">
## Idea ## Idea
If you get access to a [PCAP](https://en.wikipedia.org/wiki/Pcap) file, for example during a CTF or captured on your own, you usually have the problem of overlooking all the relevant information to get a basic idea of the capture file. This gets worse if the capture file includes lots of white noise or irrelevant traffic - often included in the capture file to cloak *interesting* packets in a bunch of packets to YouTube, Reddit, Twitter and others. If you get access to a [PCAP](https://en.wikipedia.org/wiki/Pcap) file, for example during a CTF or captured on your own, you usually have the problem of overlooking all the relevant information to get a basic idea of the capture file. This gets worse if the capture file includes lots of white noise or irrelevant traffic - often included in the capture file to cloak *interesting* packets in a bunch of packets to YouTube, Reddit, Twitter and others.
@ -10,7 +12,7 @@ If you get access to a [PCAP](https://en.wikipedia.org/wiki/Pcap) file, for exam
Simply run Simply run
`go get git.darknebu.la/maride/pancap` `go get github.com/maride/pancap`
This will also build `pancap` and place it into your `GOBIN` directory - means you can directly execute it! This will also build `pancap` and place it into your `GOBIN` directory - means you can directly execute it!

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@ -2,8 +2,8 @@ package analyze
import ( import (
"fmt" "fmt"
"git.darknebu.la/maride/pancap/output" "github.com/maride/pancap/output"
"git.darknebu.la/maride/pancap/protocol" "github.com/maride/pancap/protocol"
"github.com/google/gopacket" "github.com/google/gopacket"
"log" "log"
) )

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@ -1,42 +0,0 @@
package main
import (
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
"testing"
)
func Test_analyzePCAP(t *testing.T) {
type args struct {
source *gopacket.PacketSource
linkType layers.LinkType
}
tests := []struct {
name string
args args
wantErr bool
}{
{
name: "Faulty link type",
args: args{
source: &gopacket.PacketSource{
DecodeOptions: gopacket.DecodeOptions{
Lazy: false,
NoCopy: false,
SkipDecodeRecovery: false,
DecodeStreamsAsDatagrams: false,
},
},
linkType: 2,
},
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if err := analyzePCAP(tt.args.source, tt.args.linkType); (err != nil) != tt.wantErr {
t.Errorf("analyzePCAP() error = %v, wantErr %v", err, tt.wantErr)
}
})
}
}

2
go.mod
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@ -1,4 +1,4 @@
module git.darknebu.la/maride/pancap module github.com/maride/pancap
go 1.13 go 1.13

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@ -3,8 +3,8 @@ package main
import ( import (
"flag" "flag"
"fmt" "fmt"
"git.darknebu.la/maride/pancap/analyze" "github.com/maride/pancap/analyze"
"git.darknebu.la/maride/pancap/output" "github.com/maride/pancap/output"
"log" "log"
"math/rand" "math/rand"
"time" "time"
@ -53,13 +53,13 @@ func printMOTD() {
"PanCAP: Analyzer for pancake files", "PanCAP: Analyzer for pancake files",
"You want some syrup with these packets?", "You want some syrup with these packets?",
"Check out CONTRIBUTORS.md!", "Check out CONTRIBUTORS.md!",
"Push your commits to git.darknebu.la/maride/pancap", "Push your commits to github.com/maride/pancap",
"Don't let the white noise traffic confuse you.", "Don't let the white noise traffic confuse you.",
"Grab a Club Mate if you don't have one yet.", "Grab a Club Mate if you don't have one yet.",
"In Soviet Russia, traffic analyzes you.", "In Soviet Russia, traffic analyzes you.",
"Who captures the captors?", "Who captures the captors?",
"Respect other's privacy. Always.", "Respect other's privacy. Always.",
"Make public data available, protect private data.", // https://www.ccc.de/en/hackerethik "Make public data available, protect private data.", // https://www.ccc.de/en/hackerethik
"Most traffic is just there to confuse the russians.", // hat-tip to twitter.com/_harryr_ "Most traffic is just there to confuse the russians.", // hat-tip to twitter.com/_harryr_
} }

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@ -2,17 +2,18 @@ package output
import ( import (
"fmt" "fmt"
"git.darknebu.la/maride/pancap/common"
"io/ioutil" "io/ioutil"
"log" "log"
"os" "os"
"strings" "strings"
"github.com/maride/pancap/common"
) )
var ( var (
registeredFiles []File registeredFiles []File
notFound []string notFound []string
extractedFiles int extractedFiles int
) )
// Registers a file with the given name and content. // Registers a file with the given name and content.
@ -20,12 +21,18 @@ var (
// This means that a module should _always_ call this function when a file is encountered. // This means that a module should _always_ call this function when a file is encountered.
// origin is a descriptive string where the file comes from, e.g. the module name. // origin is a descriptive string where the file comes from, e.g. the module name.
func RegisterFile(filename string, content []byte, origin string) { func RegisterFile(filename string, content []byte, origin string) {
// Check if there even is anything to register
if len(content) == 0 {
// File is empty, won't register the void
log.Printf("Avoided registering file from %s because it is empty.", origin)
return
}
thisFile := NewFile(filename, content, origin) thisFile := NewFile(filename, content, origin)
// To avoid doubles, we need to check if that hash is already present // To avoid doubles, we need to check if that hash is already present
for _, f := range registeredFiles { for _, f := range registeredFiles {
if f.hash == thisFile.hash { if f.hash == thisFile.hash {
// Found - stop here // Found - stop here
log.Printf("Avoided registering file '%s' because it has the same content as an already registered file ", f.name) log.Printf("Avoided registering file from %s because it has the same content as an already registered file ", origin)
return return
} }
} }

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@ -2,8 +2,8 @@ package arp
import ( import (
"fmt" "fmt"
"git.darknebu.la/maride/pancap/common" "github.com/maride/pancap/common"
"git.darknebu.la/maride/pancap/output" "github.com/maride/pancap/output"
"github.com/google/gopacket" "github.com/google/gopacket"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
"log" "log"

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@ -1,7 +1,7 @@
package dhcpv4 package dhcpv4
import ( import (
"git.darknebu.la/maride/pancap/output" "github.com/maride/pancap/output"
"github.com/google/gopacket" "github.com/google/gopacket"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
) )

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@ -2,7 +2,7 @@ package dhcpv4
import ( import (
"fmt" "fmt"
"git.darknebu.la/maride/pancap/common" "github.com/maride/pancap/common"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
"log" "log"
) )

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@ -2,7 +2,7 @@ package dhcpv4
import ( import (
"fmt" "fmt"
"git.darknebu.la/maride/pancap/common" "github.com/maride/pancap/common"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
) )

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@ -2,7 +2,7 @@ package dhcpv4
import ( import (
"fmt" "fmt"
"git.darknebu.la/maride/pancap/common" "github.com/maride/pancap/common"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
"log" "log"
) )

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@ -2,7 +2,7 @@ package dns
import ( import (
"fmt" "fmt"
"git.darknebu.la/maride/pancap/common" "github.com/maride/pancap/common"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
"golang.org/x/net/publicsuffix" "golang.org/x/net/publicsuffix"
"log" "log"

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@ -1,7 +1,7 @@
package dns package dns
import ( import (
"git.darknebu.la/maride/pancap/output" "github.com/maride/pancap/output"
"github.com/google/gopacket" "github.com/google/gopacket"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
) )

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@ -2,7 +2,7 @@ package dns
import ( import (
"fmt" "fmt"
"git.darknebu.la/maride/pancap/common" "github.com/maride/pancap/common"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
"golang.org/x/net/publicsuffix" "golang.org/x/net/publicsuffix"
"log" "log"

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@ -1,8 +1,8 @@
package http package http
import ( import (
"git.darknebu.la/maride/pancap/common" "github.com/maride/pancap/common"
"git.darknebu.la/maride/pancap/output" "github.com/maride/pancap/output"
"github.com/google/gopacket" "github.com/google/gopacket"
"github.com/google/gopacket/layers" "github.com/google/gopacket/layers"
"github.com/google/gopacket/tcpassembly" "github.com/google/gopacket/tcpassembly"

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@ -3,7 +3,7 @@ package http
import ( import (
"bufio" "bufio"
"fmt" "fmt"
"git.darknebu.la/maride/pancap/output" "github.com/maride/pancap/output"
"github.com/google/gopacket" "github.com/google/gopacket"
"github.com/google/gopacket/tcpassembly" "github.com/google/gopacket/tcpassembly"
"github.com/google/gopacket/tcpassembly/tcpreader" "github.com/google/gopacket/tcpassembly/tcpreader"

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@ -1,10 +1,10 @@
package protocol package protocol
import ( import (
"git.darknebu.la/maride/pancap/protocol/arp" "github.com/maride/pancap/protocol/arp"
"git.darknebu.la/maride/pancap/protocol/dhcpv4" "github.com/maride/pancap/protocol/dhcpv4"
"git.darknebu.la/maride/pancap/protocol/dns" "github.com/maride/pancap/protocol/dns"
"git.darknebu.la/maride/pancap/protocol/http" "github.com/maride/pancap/protocol/http"
) )
var ( var (