-
Notifications
You must be signed in to change notification settings - Fork 0
/
iocgraphfunc.go
258 lines (224 loc) · 6.96 KB
/
iocgraphfunc.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
package graphproc
import (
"encoding/json"
"errors"
"regexp"
"strconv"
"strings"
)
type IOCs struct {
Md5 []string `json:"md5"`
Sha1 []string `json:"sha1"`
Sha256 []string `json:"sha256"`
Ipv4 []string `json:"ipv4"`
Ipv6 []string `json:"ipv6"`
Url []string `json:"url"`
Domain []string `json:"domain"`
}
var remd5, resha1, resha256, reipv4, reipv6, reurl, redomain *regexp.Regexp
//DeleteWhiteListIOC :
func DeleteWhiteListIOC(s *State, payload *Payload) error {
var err error = nil
return err
}
//WhiteListIOC :
func WhiteListIOC(s *State, payload *Payload) error {
var err error = nil
return err
}
//FilterWhiteListIOC :
func FilterWhiteListIOC(s *State, payload *Payload) error {
var err error = nil
return err
}
//CutFields :
func CutFields(s *State, payload *Payload) error {
//Convert the payload raw buffer into a m x n matrix of strings
matrix := BytesMatrix(payload.Raw)
//Build bitmap row of fields to cut
cutrow, err := bitmaprow(s, matrix[0])
if err != nil {
return errors.New("CutFields: unable to build rows to cut [" + err.Error() + "]")
}
//Using the cut row map, cut columns from the matrix
matrix = MatrixCut(matrix, cutrow)
//Empty the payload raw buffer and fill it the matrix converted to with string rows with \n and converted to bytes
payload.Raw = payload.Raw[:0]
payload.Raw, err = MatrixBytes(matrix, payload.Raw)
return err
}
//SelectFields :
func SelectFields(s *State, payload *Payload) error {
//Convert the payload raw buffer into a m x n matrix of strings
matrix := BytesMatrix(payload.Raw)
//Build bitmap row of fields to select
selrow, err := bitmaprow(s, matrix[0])
if err != nil {
return errors.New("SelectFields: unable to build rows to select [" + err.Error() + "]")
}
//Using the select row map, select columns from the matrix
matrix = MatrixSelect(matrix, selrow)
//Empty the payload raw buffer and fill it the matrix converted to with string rows with \n and converted to bytes
payload.Raw = payload.Raw[:0]
payload.Raw, err = MatrixBytes(matrix, payload.Raw)
return err
}
//bitmaprow : build bitmap row of fields to select
func bitmaprow(s *State, row []string) ([]bool, error) {
var bitmaprow []bool
for range row {
bitmaprow = append(bitmaprow, false)
}
if flds, ok := s.Config("fields"); ok {
flist := strings.Split(flds, " ")
for _, f := range flist {
col, err := strconv.Atoi(strings.TrimSpace(f))
if err != nil {
return nil, err
}
if col > len(bitmaprow) {
return nil, errors.New("bitmaprow: column specified is greater than length of row")
}
bitmaprow[col] = true
}
}
return bitmaprow, nil
}
//NormalIOC : convert some typical values to normal values
func NormalIOC(s *State, payload *Payload) error {
var err error = nil
var text string
text = string(payload.Raw)
text = strings.ReplaceAll(text, "hxxp", "http")
text = strings.ReplaceAll(text, "http[:]", "http:")
text = strings.ReplaceAll(text, "https[:]", "https:")
payload.Raw = append(payload.Raw[:0], []byte(text)...)
return err
}
//Md5IOC : search and return MD5
func Md5IOC(s *State, payload *Payload) error {
var err error = nil
if remd5 == nil {
remd5 = regexp.MustCompile(`\b[a-fA-F0-9]{32}\b`)
}
payload.Raw, err = IOC(remd5, payload.Raw, "md5")
return err
}
//Sha1IOC : search and return SHA1
func Sha1IOC(s *State, payload *Payload) error {
var err error = nil
if resha1 == nil {
resha1 = regexp.MustCompile(`\b[a-fA-F0-9]{40}\b`)
}
payload.Raw, err = IOC(resha1, payload.Raw, "sha1")
return err
}
//Sha256IOC : search and return SHA256
func Sha256IOC(s *State, payload *Payload) error {
var err error = nil
if resha256 == nil {
resha256 = regexp.MustCompile(`\b[a-fA-F0-9]{64}\b`)
}
payload.Raw, err = IOC(resha256, payload.Raw, "sha256")
return err
}
//Ipv4IOC : search and return IPV4
func Ipv4IOC(s *State, payload *Payload) error {
var err error = nil
if reipv4 == nil {
reipv4 = regexp.MustCompile(`\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b`)
}
payload.Raw, err = IOC(reipv4, payload.Raw, "ipv4")
return err
}
//Ipv6IOC : search and return IPV6
func Ipv6IOC(s *State, payload *Payload) error {
var err error = nil
if reipv6 == nil {
reipv6 = regexp.MustCompile(`\b(?:[a-fA-F0-9]{1,4}:){7}[a-fA-F0-9]{1,4}\b`)
}
payload.Raw, err = IOC(reipv6, payload.Raw, "ipv6")
return err
}
//UrlIOC : search and return URL
func UrlIOC(s *State, payload *Payload) error {
var err error = nil
if reurl == nil {
reurl = regexp.MustCompile(`(http|ftp|https)://([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:/~+#-]*[\w@?^=%&/~+#-])?`)
}
payload.Raw, err = IOC(reurl, payload.Raw, "url")
return err
}
//DomainIOC : search and return DOMAIN
func DomainIOC(s *State, payload *Payload) error {
var err error = nil
if redomain == nil {
redomain = regexp.MustCompile(``)
}
payload.Raw, err = IOC(reurl, payload.Raw, "domain")
return err
}
//IOC : search and return the IOC
func IOC(re *regexp.Regexp, rawbytes []byte, hashtype string) ([]byte, error) {
var err error = nil
iocs := re.FindAllString(string(rawbytes), -1)
rawbytes = rawbytes[:0]
//size := len(iocs)
for _, ioc := range iocs {
newbytes := append([]byte(hashtype+"|"), ioc...)
rawbytes = append(rawbytes, newbytes...)
rawbytes = append(rawbytes, []byte(",")...)
}
return rawbytes, err
}
//IOCtoData : conver the Raw field IOC strings to a slice in the Data field
func IOCtoData(s *State, payload *Payload) error {
var err error = nil
payload.Data = strings.Split(string(payload.Raw), ",")
return err
}
//IOCDataToJson : marshall the Data field to JSON in the Raw field
func IOCDataToJson(s *State, payload *Payload) error {
var err error = nil
var iocs IOCs
var fields []string
if payload.Data != nil {
switch t := payload.Data.(type) {
case []string:
fields = payload.Data.([]string)
default:
return errors.New("IOCtoJSON: Data field invalid type passed: " + t.(string))
}
} else {
return errors.New("IOCtoJSON: missing Data field")
}
for _, f := range fields {
if strings.TrimSpace(f) == "" {
continue
}
ioc := strings.Split(f, "|")
switch ioc[0] {
case "md5":
iocs.Md5 = append(iocs.Md5, ioc[1])
case "sha1":
iocs.Sha1 = append(iocs.Sha1, ioc[1])
case "sha256":
iocs.Sha256 = append(iocs.Sha256, ioc[1])
case "ipv4":
iocs.Ipv4 = append(iocs.Ipv4, ioc[1])
case "ipv6":
iocs.Ipv6 = append(iocs.Ipv6, ioc[1])
case "url":
iocs.Url = append(iocs.Url, ioc[1])
default:
continue
}
}
text, _ := json.Marshal(&iocs)
nullioc := regexp.MustCompile(`"[a-z0-9]*":null,?`)
trailcomm := regexp.MustCompile(`,}`)
text = []byte(nullioc.ReplaceAllString(string(text), ""))
text = []byte(trailcomm.ReplaceAllString(string(text), "}"))
payload.Raw = append(payload.Raw[:0], text...)
return err
}