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
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
|
/* packet-sebek.c
* Routines for Sebek - Kernel based data capture - packet dissection
* Modified to add sebek V3
* Copyright 2006, Camilo Viecco <cviecco@indiana.edu>
* Copyright 1999, Nathan Neulinger <nneul@umr.edu>
*
* See: http://project.honeynet.org/tools/sebek/ for more details
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <math.h>
#include <epan/packet.h>
/*
Sebek v2:
IP address: 32bit unsigned
MAGIC Val: 32bit unsigned
Sebek Ver: 16bit unsigned #value must match 2
Type 16bit unsigned
Counter: 32bit unsigned
Time_sec: 32bit unsigned
Time_usec: 32bit unsigned
Proc ID: 32bit unsigned
User ID: 32bit unsigned
File Desc: 32bit unsigned
Command: 12char array
Length: Data Length
Data: Variable Length data
Sebek v3 header
IP address: 32bit unsigned
MAGIC Val: 32bit unsigned
Sebek Ver: 16bit unsigned #value must match 3
Type 16bit unsigned
Counter: 32bit unsigned
Time_sec: 32bit unsigned
Time_usec: 32bit unsigned
Parent_pid: 32bit unsigned
Proc ID: 32bit unsigned
User ID: 32bit unsigned
File Desc: 32bit unsigned
inode: 32bit unsigned
Command: 12char array
Length: Data Length
Data: Variable data length
Sebekv3 has a sock_socket_record subheader for IPV4:
Dest_ip: 32bit unsigned
Dest_port: 16bit unsigned
Src_ip: 32bit unsigned
src_port: 16bit unsigned
call: 16bit unsigned
proto 8bit unsigned
*/
/* By default, but can be completely different */
#define UDP_PORT_SEBEK 1101 /* Not IANA registered */
void proto_register_sebek(void);
void proto_reg_handoff_sebek(void);
static dissector_handle_t sebek_handle;
static int proto_sebek = -1;
static int hf_sebek_magic = -1;
static int hf_sebek_version = -1;
static int hf_sebek_type = -1;
static int hf_sebek_counter = -1;
static int hf_sebek_time = -1;
static int hf_sebek_pid = -1;
static int hf_sebek_uid = -1;
static int hf_sebek_fd = -1;
static int hf_sebek_cmd = -1;
static int hf_sebek_len = -1;
static int hf_sebek_data = -1;
static int hf_sebek_ppid = -1;
static int hf_sebek_inode = -1;
static int hf_sebek_socket_src_ip=-1;
static int hf_sebek_socket_src_port=-1;
static int hf_sebek_socket_dst_ip=-1;
static int hf_sebek_socket_dst_port=-1;
static int hf_sebek_socket_call=-1;
static int hf_sebek_socket_proto=-1;
static gint ett_sebek = -1;
/* dissect_sebek - dissects sebek packet data
* tvb - tvbuff for packet data (IN)
* pinfo - packet info
* proto_tree - resolved protocol tree
*/
static int
dissect_sebek(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_tree *sebek_tree;
proto_item *ti;
int offset = 0;
int sebek_ver = 0;
int sebek_type = 0;
int cmd_len = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SEBEK");
col_set_str(pinfo->cinfo, COL_INFO, "SEBEK - ");
if (tvb_captured_length(tvb)<6)
sebek_ver = 0;
else
sebek_ver = tvb_get_ntohs(tvb, 4);
switch (sebek_ver) {
case 2: col_append_fstr(pinfo->cinfo, COL_INFO, " pid(%d)", tvb_get_ntohl(tvb, 20));
col_append_fstr(pinfo->cinfo, COL_INFO, " uid(%d)", tvb_get_ntohl(tvb, 24));
col_append_fstr(pinfo->cinfo, COL_INFO, " fd(%d)", tvb_get_ntohl(tvb, 28));
col_append_fstr(pinfo->cinfo, COL_INFO, " cmd: %s", tvb_format_text(pinfo->pool, tvb, 32, 12));
break;
case 3: col_append_fstr(pinfo->cinfo, COL_INFO, " pid(%d)", tvb_get_ntohl(tvb, 24));
col_append_fstr(pinfo->cinfo, COL_INFO, " uid(%d)", tvb_get_ntohl(tvb, 28));
col_append_fstr(pinfo->cinfo, COL_INFO, " fd(%d)", tvb_get_ntohl(tvb, 32));
cmd_len = tvb_strnlen(tvb, 40, 12);
if (cmd_len<0)
cmd_len = 0;
col_append_fstr(pinfo->cinfo, COL_INFO, " cmd: %s", tvb_format_text(pinfo->pool, tvb, 40, cmd_len));
break;
default:
break;
}
if (tree) {
/* Adding Sebek item and subtree */
ti = proto_tree_add_item(tree, proto_sebek, tvb, 0, -1, ENC_NA);
sebek_tree = proto_item_add_subtree(ti, ett_sebek);
/* check for minimum length before deciding where to go*/
if (tvb_captured_length(tvb)<6)
sebek_ver = 0;
else
sebek_ver = tvb_get_ntohs(tvb, 4);
switch (sebek_ver) {
case 2: proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_time, tvb, offset, 8, ENC_TIME_SECS_NSECS|ENC_BIG_ENDIAN);
offset += 8;
proto_tree_add_item(sebek_tree, hf_sebek_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, ENC_ASCII);
offset += 12;
proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, ENC_ASCII);
break;
case 3: proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
sebek_type=tvb_get_ntohs(tvb, offset);
proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_time, tvb, offset, 8, ENC_TIME_SECS_NSECS|ENC_BIG_ENDIAN);
offset += 8;
proto_tree_add_item(sebek_tree, hf_sebek_ppid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_inode, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, ENC_ASCII);
offset += 12;
proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
if (sebek_type == 2) {
/*data is socket data, process accordingly*/
proto_tree_add_item(sebek_tree, hf_sebek_socket_dst_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_socket_dst_port, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_socket_src_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_socket_src_port, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_socket_call, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_socket_proto, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
} else {
proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, ENC_ASCII);
}
break;
default:
break;
}
}
return offset;
}
void
proto_register_sebek(void)
{
static hf_register_info hf[] = {
{ &hf_sebek_magic, {
"Magic", "sebek.magic", FT_UINT32, BASE_HEX,
NULL, 0, "Magic Number", HFILL }},
{ &hf_sebek_version, {
"Version", "sebek.version", FT_UINT16, BASE_DEC,
NULL, 0, "Version Number", HFILL }},
{ &hf_sebek_type, {
"Type", "sebek.type", FT_UINT16, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_counter, {
"Counter", "sebek.counter", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_time, {
"Time", "sebek.time.sec", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_pid, {
"Process ID", "sebek.pid", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_uid, {
"User ID", "sebek.uid", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_fd, {
"File Descriptor", "sebek.fd", FT_UINT32, BASE_DEC,
NULL, 0, "File Descriptor Number", HFILL }},
{ &hf_sebek_cmd, {
"Command Name", "sebek.cmd", FT_STRING, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_len, {
"Data Length", "sebek.len", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_ppid, {
"Parent Process ID", "sebek.ppid", FT_UINT32, BASE_DEC,
NULL, 0, "Process ID", HFILL }},
{ &hf_sebek_inode, {
"Inode ID", "sebek.inode", FT_UINT32, BASE_DEC,
NULL, 0, "Process ID", HFILL }},
{ &hf_sebek_data, {
"Data", "sebek.data", FT_STRING, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_socket_src_ip, {
"Socket.local_ip", "sebek.socket.src_ip", FT_IPv4, BASE_NONE,
NULL, 0, "Socket.src_ip", HFILL }},
{ &hf_sebek_socket_src_port, {
"Socket.local_port", "sebek.socket.src_port", FT_UINT16, BASE_DEC,
NULL, 0, "Socket.src_port", HFILL }},
{ &hf_sebek_socket_dst_ip, {
"Socket.remote_ip", "sebek.socket.dst_ip", FT_IPv4, BASE_NONE,
NULL, 0, "Socket.dst_ip", HFILL }},
{ &hf_sebek_socket_dst_port, {
"Socket.remote_port", "sebek.socket.dst_port", FT_UINT16, BASE_DEC,
NULL, 0, "Socket.dst_port", HFILL }},
{ &hf_sebek_socket_call, {
"Socket.Call_id", "sebek.socket.call", FT_UINT16, BASE_DEC,
NULL, 0, "Socket.call", HFILL }},
{ &hf_sebek_socket_proto, {
"Socket.ip_proto", "sebek.socket.ip_proto", FT_UINT8, BASE_DEC,
NULL, 0, NULL, HFILL }}
};
static gint *ett[] = {
&ett_sebek
};
proto_sebek = proto_register_protocol("SEBEK - Kernel Data Capture", "SEBEK", "sebek");
proto_register_field_array(proto_sebek, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
sebek_handle = register_dissector("sebek", dissect_sebek, proto_sebek);
}
void
proto_reg_handoff_sebek(void)
{
dissector_add_uint_with_preference("udp.port", UDP_PORT_SEBEK, sebek_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
|
