def enumerate_computers_dconly(self, timestamp=""):
'''
Enumerate computer objects. This function is only used if no
collection was requested that required connecting to computers anyway.
'''
filename = timestamp + 'computers.json'
acl = 'acl' in self.collect
entries = self.addc.ad.computers.values()
logging.debug('Writing computers ACL to file: %s', filename)
# Use a separate queue for processing the results
self.result_q = queue.Queue()
results_worker = threading.Thread(
target=OutputWorker.membership_write_worker,
args=(self.result_q, 'computers', filename))
results_worker.daemon = True
results_worker.start()
if acl and not self.disable_pooling:
self.aclenumerator.init_pool()
# This loops over the cached entries
for entry in entries:
if not 'attributes' in entry:
continue
if 'dNSHostName' not in entry['attributes']:
continue
hostname = entry['attributes']['dNSHostName']
if not hostname:
continue
samname = entry['attributes']['sAMAccountName']
cobject = ADComputer(hostname=hostname,
samname=samname,
ad=self.addomain,
addc=self.addc,
objectsid=entry['attributes']['objectSid'])
cobject.primarygroup = MembershipEnumerator.get_primary_membership(
entry)
computer = cobject.get_bloodhound_data(entry,
self.collect,
skip_acl=True)
# If we are enumerating ACLs, we break out of the loop here
# this is because parsing ACLs is computationally heavy and therefor is done in subprocesses
if acl:
if self.disable_pooling:
# Debug mode, don't run this pooled since it hides exceptions
self.process_acldata(
parse_binary_acl(
computer, 'computer',
ADUtils.get_entry_property(entry,
'nTSecurityDescriptor',
raw=True),
self.addc.objecttype_guid_map))
else:
# Process ACLs in separate processes, then call the processing function to resolve entries and write them to file
self.aclenumerator.pool.apply_async(
parse_binary_acl,
args=(computer, 'computer',
ADUtils.get_entry_property(
entry, 'nTSecurityDescriptor',
raw=True), self.addc.objecttype_guid_map),
callback=self.process_acldata)
else:
# Write it to the queue -> write to file in separate thread
# this is solely for consistency with acl parsing, the performance improvement is probably minimal
self.result_q.put(computer)
# If we are parsing ACLs, close the parsing pool first
# then close the result queue and join it
if acl and not self.disable_pooling:
self.aclenumerator.pool.close()
self.aclenumerator.pool.join()
self.result_q.put(None)
else:
self.result_q.put(None)
self.result_q.join()
logging.debug('Finished writing computers')
def process_computer(self, hostname, samname, objectsid, results_q):
"""
Processes a single computer, pushes the results of the computer to the given Queue.
"""
logging.debug('Querying computer: %s', hostname)
c = ADComputer(hostname=hostname,
samname=samname,
ad=self.addomain,
objectsid=objectsid)
if c.try_connect() == True:
# Maybe try connection reuse?
try:
if 'session' in self.collect:
sessions = c.rpc_get_sessions()
else:
sessions = []
if 'localadmin' in self.collect:
c.rpc_get_local_admins()
c.rpc_resolve_sids()
c.rpc_close()
# c.rpc_get_domain_trusts()
results_q.put(('computer', c.get_bloodhound_data()))
if sessions is None:
sessions = []
for ses in sessions:
# For every session, resolve the SAM name in the GC if needed
domain = self.addomain.domain
if self.addomain.num_domains > 1 and self.do_gc_lookup:
try:
users = self.addomain.samcache.get(samname)
except KeyError:
# Look up the SAM name in the GC
users = self.addomain.objectresolver.gc_sam_lookup(
ses['user'])
if users is None:
# Unknown user
continue
self.addomain.samcache.put(samname, users)
else:
users = [((u'%s@%s' % (ses['user'], domain)).upper(),
2)]
# Resolve the IP to obtain the host the session is from
try:
target = self.addomain.dnscache.get(ses['source'])
except KeyError:
target = ADUtils.ip2host(ses['source'],
self.addomain.dnsresolver,
self.addomain.dns_tcp)
# Even if the result is the IP (aka could not resolve PTR) we still cache
# it since this result is unlikely to change during this run
self.addomain.dnscache.put_single(
ses['source'], target)
if ':' in target:
# IPv6 address, not very useful
continue
if '.' not in target:
logging.debug(
'Resolved target does not look like an IP or domain. Assuming hostname: %s',
target)
target = '%s.%s' % (target, domain)
# Put the result on the results queue.
for user in users:
results_q.put(('session', {
'UserName': user[0].upper(),
'ComputerName': target.upper(),
'Weight': user[1]
}))
except DCERPCException:
logging.warning('Querying computer failed: %s' % hostname)
except Exception as e:
logging.error('Unhandled exception in computer processing: %s',
str(e))
logging.info(traceback.format_exc())
def process_computer(self, hostname, samname, objectsid, entry, results_q):
"""
Processes a single computer, pushes the results of the computer to the given queue.
"""
logging.debug('Querying computer: %s', hostname)
c = ADComputer(hostname=hostname,
samname=samname,
ad=self.addomain,
objectsid=objectsid)
c.primarygroup = self.get_primary_membership(entry)
if c.try_connect() == True:
try:
if 'session' in self.collect:
sessions = c.rpc_get_sessions()
else:
sessions = []
if 'localadmin' in self.collect:
unresolved = c.rpc_get_group_members(544, c.admins)
c.rpc_resolve_sids(unresolved, c.admins)
if 'rdp' in self.collect:
unresolved = c.rpc_get_group_members(555, c.rdp)
c.rpc_resolve_sids(unresolved, c.rdp)
if 'dcom' in self.collect:
unresolved = c.rpc_get_group_members(562, c.dcom)
c.rpc_resolve_sids(unresolved, c.dcom)
if 'loggedon' in self.collect:
loggedon = c.rpc_get_loggedon()
else:
loggedon = []
if 'experimental' in self.collect:
services = c.rpc_get_services()
tasks = c.rpc_get_schtasks()
else:
services = []
tasks = []
c.rpc_close()
# c.rpc_get_domain_trusts()
results_q.put(
('computer', c.get_bloodhound_data(entry, self.collect)))
if sessions is None:
sessions = []
# Process found sessions
for ses in sessions:
# For every session, resolve the SAM name in the GC if needed
domain = self.addomain.domain
if self.addomain.num_domains > 1 and self.do_gc_lookup:
try:
users = self.addomain.samcache.get(samname)
except KeyError:
# Look up the SAM name in the GC
users = self.addomain.objectresolver.gc_sam_lookup(
ses['user'])
if users is None:
# Unknown user
continue
self.addomain.samcache.put(samname, users)
else:
users = [((u'%s@%s' % (ses['user'], domain)).upper(),
2)]
# Resolve the IP to obtain the host the session is from
try:
target = self.addomain.dnscache.get(ses['source'])
except KeyError:
target = ADUtils.ip2host(ses['source'],
self.addomain.dnsresolver,
self.addomain.dns_tcp)
# Even if the result is the IP (aka could not resolve PTR) we still cache
# it since this result is unlikely to change during this run
self.addomain.dnscache.put_single(
ses['source'], target)
if ':' in target:
# IPv6 address, not very useful
continue
if '.' not in target:
logging.debug(
'Resolved target does not look like an IP or domain. Assuming hostname: %s',
target)
target = '%s.%s' % (target, domain)
# Put the result on the results queue.
for user in users:
results_q.put(('session', {
'UserName': user[0].upper(),
'ComputerName': target.upper(),
'Weight': user[1]
}))
if loggedon is None:
loggedon = []
# Put the logged on users on the queue too
for user in loggedon:
results_q.put(('session', {
'UserName': ('%s@%s' % user).upper(),
'ComputerName': hostname.upper(),
'Weight': 1
}))
# Process Tasks
for taskuser in tasks:
try:
user = self.addomain.sidcache.get(taskuser)
except KeyError:
# Resolve SID in GC
userentry = self.addomain.objectresolver.resolve_sid(
taskuser)
# Resolve it to an entry and store in the cache
user = ADUtils.resolve_ad_entry(userentry)
self.addomain.sidcache.put(taskuser, user)
logging.debug('Resolved TASK SID to username: %s',
user['principal'])
# Use sessions for now
results_q.put(('session', {
'UserName': user['principal'].upper(),
'ComputerName': hostname.upper(),
'Weight': 2
}))
# Process Services
for serviceuser in services:
# Todo: use own cache
try:
user = self.addomain.sidcache.get(serviceuser)
except KeyError:
# Resolve UPN in GC
userentry = self.addomain.objectresolver.resolve_upn(
serviceuser)
# Resolve it to an entry and store in the cache
user = ADUtils.resolve_ad_entry(userentry)
self.addomain.sidcache.put(serviceuser, user)
logging.debug('Resolved Service UPN to username: %s',
user['principal'])
# Use sessions for now
results_q.put(('session', {
'UserName': user['principal'].upper(),
'ComputerName': hostname.upper(),
'Weight': 2
}))
except DCERPCException:
logging.warning('Querying computer failed: %s' % hostname)
except Exception as e:
logging.error(
'Unhandled exception in computer %s processing: %s',
hostname, str(e))
logging.info(traceback.format_exc())
else:
# Write the info we have to the file regardless
try:
results_q.put(
('computer', c.get_bloodhound_data(entry, self.collect)))
except Exception as e:
logging.error(
'Unhandled exception in computer %s processing: %s',
hostname, str(e))
logging.info(traceback.format_exc())
def process_computer(self, hostname, samname, objectsid, entry, results_q):
"""
Processes a single computer, pushes the results of the computer to the given queue.
"""
logging.debug('Querying computer: %s', hostname)
c = ADComputer(hostname=hostname,
samname=samname,
ad=self.addomain,
addc=self.addc,
objectsid=objectsid)
c.primarygroup = self.get_primary_membership(entry)
if c.try_connect() == True:
try:
if 'session' in self.collect:
sessions = c.rpc_get_sessions()
else:
sessions = []
if 'localadmin' in self.collect:
unresolved = c.rpc_get_group_members(544, c.admins)
c.rpc_resolve_sids(unresolved, c.admins)
if 'rdp' in self.collect:
unresolved = c.rpc_get_group_members(555, c.rdp)
c.rpc_resolve_sids(unresolved, c.rdp)
if 'dcom' in self.collect:
unresolved = c.rpc_get_group_members(562, c.dcom)
c.rpc_resolve_sids(unresolved, c.dcom)
if 'psremote' in self.collect:
unresolved = c.rpc_get_group_members(580, c.psremote)
c.rpc_resolve_sids(unresolved, c.psremote)
if 'loggedon' in self.collect:
loggedon = c.rpc_get_loggedon()
else:
loggedon = []
if 'experimental' in self.collect:
services = c.rpc_get_services()
tasks = c.rpc_get_schtasks()
else:
services = []
tasks = []
c.rpc_close()
# c.rpc_get_domain_trusts()
if sessions is None:
sessions = []
# Should we use the GC?
use_gc = self.addomain.num_domains > 1 and self.do_gc_lookup
# Process found sessions
for ses in sessions:
# For every session, resolve the SAM name in the GC if needed
domain = self.addomain.domain
try:
users = self.addomain.samcache.get(samname)
except KeyError:
# Look up the SAM name in the GC
entries = self.addomain.objectresolver.resolve_samname(
ses['user'], use_gc=use_gc)
if entries is not None:
users = [
user['attributes']['objectSid']
for user in entries
]
if entries is None or users == []:
logging.warning(
'Failed to resolve SAM name %s in current forest',
samname)
continue
self.addomain.samcache.put(samname, users)
# Resolve the IP to obtain the host the session is from
try:
target = self.addomain.dnscache.get(ses['source'])
except KeyError:
# TODO: also use discovery based on port 445 connections similar to sharphound
target = ADUtils.ip2host(ses['source'],
self.addomain.dnsresolver,
self.addomain.dns_tcp)
# Even if the result is the IP (aka could not resolve PTR) we still cache
# it since this result is unlikely to change during this run
self.addomain.dnscache.put_single(
ses['source'], target)
if ':' in target:
# IPv6 address, not very useful
continue
if '.' not in target:
logging.debug(
'Resolved target does not look like an IP or domain. Assuming hostname: %s',
target)
target = '%s.%s' % (target, domain)
# Resolve target hostname
try:
hostsid = self.addomain.computersidcache.get(
target.lower())
except KeyError:
logging.warning(
'Could not resolve hostname to SID: %s', target)
continue
# Put the result on the results queue.
for user in users:
c.sessions.append({
'ComputerId': hostsid,
'UserId': user
})
if loggedon is None:
loggedon = []
# Put the logged on users on the queue too
for user, userdomain in loggedon:
# Construct fake UPN to cache this user
fupn = '%s@%s' % (user.upper(), userdomain.upper())
try:
users = self.addomain.samcache.get(fupn)
except KeyError:
entries = self.addomain.objectresolver.resolve_samname(
user, use_gc=use_gc)
if entries is not None:
if len(entries) > 1:
for resolved_user in entries:
edn = ADUtils.get_entry_property(
resolved_user, 'distinguishedName')
edom = ADUtils.ldap2domain(edn).lower()
if edom == userdomain.lower():
users = [
resolved_user['attributes']
['objectSid']
]
break
logging.debug(
'Skipping resolved user %s since domain does not match (%s != %s)',
edn, edom, userdomain.lower())
else:
users = [
resolved_user['attributes']['objectSid']
for resolved_user in entries
]
if entries is None or users == []:
logging.warning(
'Failed to resolve SAM name %s in current forest',
samname)
continue
self.addomain.samcache.put(fupn, users)
for resultuser in users:
c.sessions.append({
'ComputerId': objectsid,
'UserId': resultuser
})
# Process Tasks
for taskuser in tasks:
c.sessions.append({
'ComputerId': objectsid,
'UserId': taskuser
})
# Process Services
for serviceuser in services:
try:
user = self.addomain.sidcache.get(serviceuser)
except KeyError:
# Resolve UPN in GC
userentry = self.addomain.objectresolver.resolve_upn(
serviceuser)
# Resolve it to an entry and store in the cache
self.addomain.sidcache.put(
serviceuser, userentry['attributes']['objectSid'])
user = userentry['attributes']['objectSid']
logging.debug('Resolved Service UPN to SID: %s',
user['objectsid'])
c.sessions.append({
'ComputerId': objectsid,
'UserId': user
})
results_q.put(
('computer', c.get_bloodhound_data(entry, self.collect)))
except DCERPCException:
logging.debug(traceback.format_exc())
logging.warning('Querying computer failed: %s', hostname)
except Exception as e:
logging.error(
'Unhandled exception in computer %s processing: %s',
hostname, str(e))
logging.info(traceback.format_exc())
else:
# Write the info we have to the file regardless
try:
results_q.put(
('computer', c.get_bloodhound_data(entry, self.collect)))
except Exception as e:
logging.error(
'Unhandled exception in computer %s processing: %s',
hostname, str(e))
logging.info(traceback.format_exc())