File size: 5,336 Bytes
8377638 | 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 | # Detecting PoisonIvy for Volatility
#
# LICENSE
# Please refer to the LICENSE.txt in the https://github.com/JPCERTCC/MalConfScan/
#
# How to use:
# 1. cd "Volatility Folder"
# 2. mv poisonivyscan.py volatility/plugins/malware
# 3. python vol.py poisonivyconfig -f images.mem --profile=Win7SP1x64
import volatility.plugins.taskmods as taskmods
import volatility.win32.tasks as tasks
import volatility.utils as utils
import volatility.debug as debug
import volatility.plugins.malware.malfind as malfind
import re
import pefile
from struct import unpack, unpack_from
try:
import yara
has_yara = True
except ImportError:
has_yara = False
poisonivy_sig = {
'namespace1' : 'rule PoisonIvy { \
strings: \
$a1 = { 0E 89 02 44 } \
$b1 = { AD D1 34 41 } \
$c1 = { 66 35 20 83 66 81 F3 B8 ED } \
condition: all of them}'
}
# idx list
idx_list = {
0x012d: ["Install Name", 1],
0x0145: ["Password", 1],
0x0165: ["AcviteX Key", 1],
0x018c: ["C&C Servers Count", 0],
0x0190: ["Server", 1],
0x02c1: ["Proxy Servers Count", 0],
0x03f3: ["Install Path", 1],
0x03f6: ["AcviteX Flag", 2],
0x03f7: ["Installation Folder", 3],
0x03f8: ["Auto-remove Flag", 2],
0x03f9: ["Thread Persistence Flag", 2],
0x03fa: ["Keylog Flag", 2],
0x03fb: ["Mutex", 1],
0x040f: ["Active Setup Name", 1],
0x0418: ["Default Browser Path", 1],
0x0441: ["Injection Flag", 2],
0x0442: ["Injection Process", 1],
0x0456: ["Active Key", 1],
0x0af4: ["Proxy Hijack", 2],
0x0af5: ["Persistent Proxy", 2],
0x0afa: ["Campaign ID", 1],
0x0bf9: ["Group ID", 1],
0x0d08: ["Inject Default Browser", 2],
0x0d09: ["Registry Key Flag", 2],
0x0d12: ["ADS Flag", 2],
0x0e12: ["Registry Key Value", 1],
0x1201: ["Server", 1],
0xeffc: ["unknow 1", 2],
0xef8c: ["unknow 2", 2],
0xef7c: ["unknow 3", 2],
}
# Config pattern
CONFIG_PATTERNS = [re.compile("\xFA\x0A(.)\x00", re.DOTALL)]
MODE = {0: "Disable", 1: "Enable"}
FOLDER = {1: "%systemroot%", 2: "%systemroot%\system32"}
class poisonivyConfig(taskmods.DllList):
"""Parse the PoisonIvy configuration"""
@staticmethod
def is_valid_profile(profile):
return (profile.metadata.get('os', 'unknown') == 'windows'), profile.metadata.get('memory_model', '32bit')
def get_vad_base(self, task, address):
for vad in task.VadRoot.traverse():
if address >= vad.Start and address < vad.End:
return vad.Start, vad.End
return None
def parse_config(self, idx, data):
p_data = {}
if idx in idx_list:
field, field_type = idx_list[idx]
else:
field = hex(idx)
field_type = 0
if field_type == 0:
if unpack_from("<I", data)[0] == 0xffffffff:
p_data[field] = 0
else:
p_data[field] = unpack_from("<I", data)[0]
if field_type == 1:
p_data[field] = data
if field_type == 2:
p_data[field] = MODE[ord(data)]
if field_type == 3:
p_data[field] = FOLDER[ord(data)]
return p_data
def calculate(self):
if not has_yara:
debug.error("Yara must be installed for this plugin")
addr_space = utils.load_as(self._config)
os, memory_model = self.is_valid_profile(addr_space.profile)
if not os:
debug.error("This command does not support the selected profile.")
rules = yara.compile(sources=poisonivy_sig)
for task in self.filter_tasks(tasks.pslist(addr_space)):
scanner = malfind.VadYaraScanner(task=task, rules=rules)
for hit, address in scanner.scan():
vad_base_addr, end = self.get_vad_base(task, address)
proc_addr_space = task.get_process_address_space()
data = proc_addr_space.zread(vad_base_addr, end - vad_base_addr)
config_data = []
for pattern in CONFIG_PATTERNS:
mc = re.search(pattern, data)
if mc:
offset = mc.start()
while data[offset] != "\xC3":
offset -= 1
while data[offset:offset + 2] != "\x00\x00":
(idx, size) = unpack_from("<HH", data, offset + 1)
if size > 0:
enc = data[offset + 5:offset + 5 + size]
config_data.append(self.parse_config(idx, enc))
offset = offset + size + 4
yield task, vad_base_addr, end, hit, memory_model, config_data
break
def render_text(self, outfd, data):
delim = '-' * 70
for task, start, end, malname, memory_model, config_data in data:
outfd.write("{0}\n".format(delim))
outfd.write("Process: {0} ({1})\n\n".format(task.ImageFileName, task.UniqueProcessId))
outfd.write("[Config Info]\n")
for p_data in config_data:
for id, param in p_data.items():
outfd.write("{0:<20}: {1}\n".format(id, param))
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