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Added: check for null sessions and MS17-010
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@lgandx
lgandx committed Nov 20, 2017
1 parent 207b0d4 commit b37f562
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Showing 2 changed files with 484 additions and 85 deletions.
159 changes: 74 additions & 85 deletions tools/RunFinger.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
from socket import *
from odict import OrderedDict
import optparse
from RunFingerPackets import *

__version__ = "0.7"

Expand Down Expand Up @@ -61,82 +62,6 @@ def GetBootTime(data):
time = datetime.datetime.fromtimestamp(t[0])
return time, time.strftime('%Y-%m-%d %H:%M:%S')

class SMBHeader(Packet):
fields = OrderedDict([
("proto", "\xff\x53\x4d\x42"),
("cmd", "\x72"),
("error-code", "\x00\x00\x00\x00" ),
("flag1", "\x00"),
("flag2", "\x00\x00"),
("pidhigh", "\x00\x00"),
("signature", "\x00\x00\x00\x00\x00\x00\x00\x00"),
("reserved", "\x00\x00"),
("tid", "\x00\x00"),
("pid", "\x00\x00"),
("uid", "\x00\x00"),
("mid", "\x00\x00"),
])

class SMBNego(Packet):
fields = OrderedDict([
("Wordcount", "\x00"),
("Bcc", "\x62\x00"),
("Data", "")
])

def calculate(self):
self.fields["Bcc"] = struct.pack("<h",len(str(self.fields["Data"])))

class SMBNegoData(Packet):
fields = OrderedDict([
("BuffType","\x02"),
("Dialect", "NT LM 0.12\x00"),
])


class SMBSessionFingerData(Packet):
fields = OrderedDict([
("wordcount", "\x0c"),
("AndXCommand", "\xff"),
("reserved","\x00" ),
("andxoffset", "\x00\x00"),
("maxbuff","\x04\x11"),
("maxmpx", "\x32\x00"),
("vcnum","\x00\x00"),
("sessionkey", "\x00\x00\x00\x00"),
("securitybloblength","\x4a\x00"),
("reserved2","\x00\x00\x00\x00"),
("capabilities", "\xd4\x00\x00\xa0"),
("bcc1","\xb1\x00"), #hardcoded len here and hardcoded packet below, no calculation, faster.
("Data","\x60\x48\x06\x06\x2b\x06\x01\x05\x05\x02\xa0\x3e\x30\x3c\xa0\x0e\x30\x0c\x06\x0a\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a\xa2\x2a\x04\x28\x4e\x54\x4c\x4d\x53\x53\x50\x00\x01\x00\x00\x00\x07\x82\x08\xa2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x05\x01\x28\x0a\x00\x00\x00\x0f\x00\x57\x00\x69\x00\x6e\x00\x64\x00\x6f\x00\x77\x00\x73\x00\x20\x00\x32\x00\x30\x00\x30\x00\x32\x00\x20\x00\x53\x00\x65\x00\x72\x00\x76\x00\x69\x00\x63\x00\x65\x00\x20\x00\x50\x00\x61\x00\x63\x00\x6b\x00\x20\x00\x33\x00\x20\x00\x32\x00\x36\x00\x30\x00\x30\x00\x00\x00\x57\x00\x69\x00\x6e\x00\x64\x00\x6f\x00\x77\x00\x73\x00\x20\x00\x32\x00\x30\x00\x30\x00\x32\x00\x20\x00\x35\x00\x2e\x00\x31\x00\x00\x00\x00\x00"),
])

##Now Lanman
class SMBHeaderLanMan(Packet):
fields = OrderedDict([
("proto", "\xff\x53\x4d\x42"),
("cmd", "\x72"),
("error-code", "\x00\x00\x00\x00" ),
("flag1", "\x08"),
("flag2", "\x01\xc8"),
("pidhigh", "\x00\x00"),
("signature", "\x00\x00\x00\x00\x00\x00\x00\x00"),
("reserved", "\x00\x00"),
("tid", "\x00\x00"),
("pid", "\x3c\x1b"),
("uid", "\x00\x00"),
("mid", "\x00\x00"),
])

#We grab the domain and hostname from the negotiate protocol answer, since it is in a Lanman dialect format.
class SMBNegoDataLanMan(Packet):
fields = OrderedDict([
("Wordcount", "\x00"),
("Bcc", "\x0c\x00"),#hardcoded len here and hardcoded packet below, no calculation, faster.
("BuffType","\x02"),
("Dialect", "NT LM 0.12\x00"),

])

#####################

Expand Down Expand Up @@ -181,7 +106,6 @@ def DomainGrab(Host):
s.settimeout(Timeout)
s.connect(Host)
except:
print "Host down or port close, skipping"
pass
try:
h = SMBHeaderLanMan(cmd="\x72",mid="\x01\x00",flag1="\x00", flag2="\x00\x00")
Expand All @@ -202,7 +126,6 @@ def SmbFinger(Host):
s.settimeout(Timeout)
s.connect(Host)
except:
print "Host down or port close, skipping"
pass
try:
h = SMBHeader(cmd="\x72",flag1="\x18",flag2="\x53\xc8")
Expand All @@ -220,28 +143,92 @@ def SmbFinger(Host):
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
s.close()
if data[8:10] == "\x73\x16":
OsVersion, ClientVersion = OsNameClientVersion(data)
return signing, OsVersion, ClientVersion
except:
pass

##################
#run it
def ShowResults(Host):

def SmbNullSession(Host):
s = socket(AF_INET, SOCK_STREAM)
try:
s.settimeout(Timeout)
s.connect(Host)
except:
return False
pass

try:
h = SMBHeader(cmd="\x72",flag1="\x18", flag2="\x53\xc8")
n = SMBNego(Data = SMBNegoData())
n.calculate()
packet0 = str(h)+str(n)
buffer0 = longueur(packet0)+packet0
s.send(buffer0)
data = s.recv(2048)
try:
if data[8:10] == "\x72\x00":
head = SMBHeader(cmd="\x73",flag1="\x18", flag2="\x53\xc8")
t = SMBSessionData()
t.calculate()
final = t
packet1 = str(head)+str(final)
buffer1 = longueur(packet1)+packet1
s.send(buffer1)
data = s.recv(2048)

if data[8:10] == "\x73\x16":
head = SMBHeader(cmd="\x73",flag1="\x18", flag2="\x17\xc8",uid=data[32:34],mid="\x80\x00")
t = SMBSession2()
t.calculate()
final = t
packet1 = str(head)+str(final)
buffer1 = longueur(packet1)+packet1
s.send(buffer1)
data = s.recv(2048)

if data[8:10] == "\x73\x00":
head = SMBHeader(cmd="\x75",flag1="\x18", flag2="\x07\xc8",uid=data[32:34],mid="\xc0\x00")
t = SMBTreeConnectData(Path="\\\\"+Host[0]+"\\IPC$")
t.calculate()
packet1 = str(head)+str(t)
buffer1 = longueur(packet1)+packet1
s.send(buffer1)
data = s.recv(2048)

if data[8:10] == "\x75\x00":
global Guest
Guest = True
head = SMBHeader(cmd="\x25",flag1="\x18", flag2="\x07\xc8",uid=data[32:34],tid=data[28:30],mid="\xc0\x00")
t = SMBTransRAPData()
t.calculate()
packet1 = str(head)+str(t)
buffer1 = longueur(packet1)+packet1
s.send(buffer1)
data = s.recv(2048)
if data[9:13] == "\x05\x02\x00\xc0":
return Guest, True
else:
return Guest, False
else:
return False, False
except Exception:
pass

except:
pass

##################
#run it
def ShowResults(Host):
try:
print "Retrieving information for %s..."%Host[0]
Hostname, DomainJoined, Time = DomainGrab(Host)
Signing, OsVer, LanManClient = SmbFinger(Host)
NullSess, Ms17010 = SmbNullSession(Host)
print "Retrieving information for %s..."%Host[0]
print "SMB signing:", Signing
print "Null Sessions Allowed:", NullSess
print "Vulnerable to MS10-010:", Ms17010
print "Server Time:", Time[1]
print "Os version: '%s'\nLanman Client: '%s'"%(OsVer, LanManClient)
print "Machine Hostname: '%s'\nThis machine is part of the '%s' domain\n"%(Hostname, DomainJoined)
Expand All @@ -259,9 +246,11 @@ def ShowSmallResults(Host):
try:
Hostname, DomainJoined, Time = DomainGrab(Host)
Signing, OsVer, LanManClient = SmbFinger(Host)
Message = "['%s', Os:'%s', Domain:'%s', Signing:'%s', Time:'%s']"%(Host[0], OsVer, DomainJoined, Signing, Time[1])
NullSess, Ms17010 = SmbNullSession(Host)
Message = "['%s', Os:'%s', Domain:'%s', Signing:'%s', Time:'%s', Null Session: %s, MS17-010: %s]"%(Host[0], OsVer, DomainJoined, Signing, Time[1],NullSess, Ms17010)
print Message
except:
raise
pass

def IsGrepable():
Expand Down
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