-
Notifications
You must be signed in to change notification settings - Fork 969
/
net_base.py
313 lines (272 loc) · 10.8 KB
/
net_base.py
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
# Mobile Verification Toolkit (MVT)
# Copyright (c) 2021-2023 The MVT Authors.
# Use of this software is governed by the MVT License 1.1 that can be found at
# https://license.mvt.re/1.1/
import logging
import operator
import sqlite3
from pathlib import Path
from typing import Optional, Union
from mvt.common.utils import convert_mactime_to_iso
from .base import IOSExtraction
class NetBase(IOSExtraction):
"""This class provides a base for DataUsage and NetUsage extraction
modules."""
def __init__(
self,
file_path: Optional[str] = None,
target_path: Optional[str] = None,
results_path: Optional[str] = None,
module_options: Optional[dict] = None,
log: logging.Logger = logging.getLogger(__name__),
results: Optional[list] = None,
) -> None:
super().__init__(
file_path=file_path,
target_path=target_path,
results_path=results_path,
module_options=module_options,
log=log,
results=results,
)
def _extract_net_data(self):
conn = sqlite3.connect(self.file_path)
cur = conn.cursor()
cur.execute(
"""
SELECT
ZPROCESS.ZFIRSTTIMESTAMP,
ZPROCESS.ZTIMESTAMP,
ZPROCESS.ZPROCNAME,
ZPROCESS.ZBUNDLENAME,
ZPROCESS.Z_PK,
ZLIVEUSAGE.ZWIFIIN,
ZLIVEUSAGE.ZWIFIOUT,
ZLIVEUSAGE.ZWWANIN,
ZLIVEUSAGE.ZWWANOUT,
ZLIVEUSAGE.Z_PK,
ZLIVEUSAGE.ZHASPROCESS,
ZLIVEUSAGE.ZTIMESTAMP
FROM ZLIVEUSAGE
LEFT JOIN ZPROCESS ON ZLIVEUSAGE.ZHASPROCESS = ZPROCESS.Z_PK
UNION
SELECT ZFIRSTTIMESTAMP, ZTIMESTAMP, ZPROCNAME, ZBUNDLENAME, Z_PK,
NULL, NULL, NULL, NULL, NULL, NULL, NULL
FROM ZPROCESS WHERE Z_PK NOT IN
(SELECT ZHASPROCESS FROM ZLIVEUSAGE);
"""
)
for row in cur:
# ZPROCESS records can be missing after the JOIN.
# Handle NULL timestamps.
if row[0] and row[1]:
first_isodate = convert_mactime_to_iso(row[0])
isodate = convert_mactime_to_iso(row[1])
else:
first_isodate = row[0]
isodate = row[1]
if row[11]:
live_timestamp = convert_mactime_to_iso(row[11])
else:
live_timestamp = ""
self.results.append(
{
"first_isodate": first_isodate,
"isodate": isodate,
"proc_name": row[2],
"bundle_id": row[3],
"proc_id": row[4],
"wifi_in": row[5],
"wifi_out": row[6],
"wwan_in": row[7],
"wwan_out": row[8],
"live_id": row[9],
"live_proc_id": row[10],
"live_isodate": live_timestamp if row[11] else first_isodate,
}
)
cur.close()
conn.close()
self.log.info("Extracted information on %d processes", len(self.results))
def serialize(self, record: dict) -> Union[dict, list]:
record_data = (
f"{record['proc_name']} (Bundle ID: {record['bundle_id']},"
f" ID: {record['proc_id']})"
)
record_data_usage = (
record_data + " "
f"WIFI IN: {record['wifi_in']}, "
f"WIFI OUT: {record['wifi_out']} - "
f"WWAN IN: {record['wwan_in']}, "
f"WWAN OUT: {record['wwan_out']}"
)
records = [
{
"timestamp": record["live_isodate"],
"module": self.__class__.__name__,
"event": "live_usage",
"data": record_data_usage,
}
]
# Only included first_usage and current_usage records when a
# ZPROCESS entry exists.
if (
"MANIPULATED" not in record["proc_name"]
and "MISSING" not in record["proc_name"]
and record["live_proc_id"] is not None
):
records.extend(
[
{
"timestamp": record["first_isodate"],
"module": self.__class__.__name__,
"event": "first_usage",
"data": record_data,
},
{
"timestamp": record["isodate"],
"module": self.__class__.__name__,
"event": "current_usage",
"data": record_data,
},
]
)
return records
def _find_suspicious_processes(self):
if not self.is_fs_dump:
return
if not self.results:
return
# If we are instructed to run fast, we skip this.
if self.module_options.get("fast_mode", None):
self.log.info(
"Option 'fast_mode' was enabled: skipping extended "
"search for suspicious processes"
)
return
self.log.info("Extended search for suspicious processes ...")
files = []
for posix_path in Path(self.target_path).rglob("*"):
try:
if not posix_path.is_file():
continue
except PermissionError:
continue
files.append([posix_path.name, str(posix_path)])
for proc in self.results:
if not proc["bundle_id"]:
self.log.debug(
"Found process with no Bundle ID with name: %s", proc["proc_name"]
)
binary_path = None
for file in files:
if proc["proc_name"] == file[0]:
binary_path = file[1]
break
if binary_path:
self.log.debug("Located at %s", binary_path)
else:
msg = (
"Could not find the binary associated with the "
f"process with name {proc['proc_name']}"
)
if not proc["proc_name"]:
msg = (
"Found process entry with empty 'proc_name': "
f"{proc['live_proc_id']} at {proc['live_isodate']}"
)
elif len(proc["proc_name"]) == 16:
msg += (
" (However, the process name might have "
"been truncated in the database)"
)
self.log.warning(msg)
if not proc["live_proc_id"]:
self.log.info(
"Found process entry in ZPROCESS but not in ZLIVEUSAGE: %s at %s",
proc["proc_name"],
proc["live_isodate"],
)
def check_manipulated(self):
"""Check for missing or manipulate DB entries"""
# Don't show duplicates for each missing process.
missing_process_cache = set()
for result in sorted(self.results, key=operator.itemgetter("live_isodate")):
if result["proc_id"]:
continue
# Avoid duplicate warnings for same process.
if result["live_proc_id"] not in missing_process_cache:
missing_process_cache.add(result["live_proc_id"])
self.log.warning(
"Found manipulated process entry %s. Entry on %s",
result["live_proc_id"],
result["live_isodate"],
)
# Set manipulated proc timestamp so it appears in timeline.
result["first_isodate"] = result["isodate"] = result["live_isodate"]
result["proc_name"] = "MANIPULATED [process record deleted]"
self.detected.append(result)
def find_deleted(self):
"""Identify process which may have been deleted from the DataUsage
database."""
results_by_proc = {
proc["proc_id"]: proc for proc in self.results if proc["proc_id"]
}
all_proc_id = sorted(results_by_proc.keys())
# Fix issue #108
if not all_proc_id:
return
missing_procs, last_proc_id = {}, None
for proc_id in range(min(all_proc_id), max(all_proc_id)):
if proc_id not in all_proc_id:
previous_proc = results_by_proc[last_proc_id]
self.log.info(
'Missing process %d. Previous process at "%s" (%s)',
proc_id,
previous_proc["first_isodate"],
previous_proc["proc_name"],
)
missing_procs[proc_id] = {
"proc_id": proc_id,
"prev_proc_id": last_proc_id,
"prev_proc_name": previous_proc["proc_name"],
"prev_proc_bundle": previous_proc["bundle_id"],
"prev_proc_first": previous_proc["first_isodate"],
}
else:
last_proc_id = proc_id
# Add a placeholder entry for the missing processes.
for proc_id, proc in missing_procs.items():
# Set default DataUsage keys.
result = {key: None for key in self.results[0].keys()}
result["first_isodate"] = result["isodate"] = result["live_isodate"] = proc[
"prev_proc_first"
]
result["proc_name"] = f"MISSING [follows {proc['prev_proc_name']}]"
result["proc_id"] = result["live_proc_id"] = proc["proc_id"]
result["bundle_id"] = None
self.results.append(result)
self.results = sorted(self.results, key=operator.itemgetter("first_isodate"))
def check_indicators(self) -> None:
# Check for manipulated process records.
# TODO: Catching KeyError for live_isodate for retro-compatibility.
# This is not very good.
try:
self.check_manipulated()
self.find_deleted()
except KeyError:
pass
if not self.indicators:
return
for result in self.results:
try:
proc_name = result["proc_name"]
except KeyError:
continue
# Process ID may be empty if process records have been manipulated.
if not result["proc_id"]:
continue
ioc = self.indicators.check_process(proc_name)
if ioc:
result["matched_indicator"] = ioc
self.detected.append(result)