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impdump.py
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impdump.py
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#!/usr/bin/python
#
# ImpDump uses the creddump library (included) and was heavily adapted
# from creddump's code.
#
# All credit to the original author(s): Brendan Dolan-Gavitt and others
# See the README for full credits.
#
# creddump is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# creddump is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with creddump. If not, see <http://www.gnu.org/licenses/>.
#
import sys, unicodedata
from binascii import *
from framework.win32.dshashdump import get_syskey,ds_decrypt_pek,ds_decrypt_single_hash,ds_decrypt_with_pek
# manually decrypt a single hash
def decUserHash(bootkey,rawPekKey,user,rawRID,rawLMhash,rawNTLMhash):
rid = int(rawRID[48:],16)
encPEK = unhexlify(rawPekKey[16:])
pek = ds_decrypt_pek(bootkey, encPEK)
if (not rawLMhash):
rawLMhash = ""
if rawLMhash.startswith("1100000000000000"):
rawLMhash = rawLMhash[16:]
if rawNTLMhash.startswith("1100000000000000"):
rawNTLMhash = rawNTLMhash[16:]
pekENClm = unhexlify(rawLMhash)
pekENCntlm = unhexlify(rawNTLMhash)
encLM = ds_decrypt_with_pek(pek, rawLMhash)
encNTLM = ds_decrypt_with_pek(pek, pekENCntlm)
lm = ds_decrypt_single_hash(rid, encLM)
ntlm = ds_decrypt_single_hash(rid, encNTLM)
out = user+":"+str(rid)
if ((not encLM) or (encLM == "")):
out+= ":aad3b435b51404eeaad3b435b51404ee:"
else:
out += ":"+lm.encode('hex')+":"
if (ntlm == ""):
out += "NO PASSWORD*********************:::"
else:
out += ntlm.encode('hex')+":::"
return out
# decrypt user hash histories
def decUserHashHistory(bootkey, rawPekKey, user, rawRID, rawLMhashHistory, rawNTLMhashHistory):
rid = int(rawRID[48:],16)
encPEK = unhexlify(rawPekKey[16:])
pek = ds_decrypt_pek(bootkey, encPEK)
if rawLMhashHistory.startswith("1100000000000000"):
rawLMhashHistory = rawLMhashHistory[16:]
if rawNTLMhashHistory.startswith("1100000000000000"):
rawNTLMhashHistory = rawNTLMhashHistory[16:]
pekENClmHistory = unhexlify(rawLMhashHistory)
pekENCntlmHistory = unhexlify(rawNTLMhashHistory)
encLM = ds_decrypt_with_pek(pek, pekENClmHistory)
encNTLM = ds_decrypt_with_pek(pek, pekENCntlmHistory)
histories = []
for hindex in range(0,len(encNTLM)/16):
ntlm = ds_decrypt_single_hash(rid, encNTLM[hindex*16:(hindex+1)*16])
lm = ds_decrypt_single_hash(rid, encLM[hindex*16:(hindex+1)*16])
if hindex == 0:
out = user+":"+str(rid)
else:
out = user+"_history"+str(hindex-1)+":"+str(rid)
if (lm == ""):
out+= ":aad3b435b51404eeaad3b435b51404ee:"
else:
out += ":"+lm.encode('hex')+":"
if (ntlm == ""):
out += "NO PASSWORD*********************:::"
else:
out += ntlm.encode('hex')+":::"
histories.append(out)
return histories
# decrypt/return just the krbtgt NTLM hash
def decKrbtgt(hiveFile,hashFile):
#get the bootkey from the system hive
bootkey = get_syskey(hiveFile)
f = open(hashFile)
raw = f.read()
f.close()
krbtgt_acct = None
rawPekKey = None
rawRID = None
rawNTLMhash = None
# split along account boundaries
accts = raw.split("ATTm3")
for acct in accts:
if "ATTk590689" in acct:
for part in acct.split('\n'):
if part.startswith("ATTk590689"):
rawPekKey = part.split(":")[1].strip().strip('\'')
elif "u\'krbtgt\'" in acct and "ATTk589914" in acct:
for part in acct.split('\n'):
if part.startswith("ATTr589970"):
rawRID = part.split(":")[1].strip().strip('\'')
elif part.startswith("ATTk589914"):
rawNTLMhash = part.split(":")[1].strip().strip('\'')
print decUserHash(bootkey, rawPekKey, "krbtgt", rawRID, "", rawNTLMhash)
# decrypt/return all user hashes
def decUserHashes(hiveFile,hashFile):
#get the bootkey from the system hive
bootkey = get_syskey(hiveFile)
f = open(hashFile)
raw = f.read()
f.close()
krbtgt_acct = None
rawPekKey = None
rawRID = None
rawNTLMhash = None
rawLMhash = None
# split along account boundaries
accts = raw.split("ATTm3")
for acct in accts:
if "ATTk590689" in acct:
for part in acct.split('\n'):
if part.startswith("ATTk590689"):
rawPekKey = part.split(":")[1].strip().strip('\'')
# only examine accts with a valid NTLM hash
elif "ATTk589914" in acct:
parts = acct.split('\n')
for part in parts:
if part.startswith("ATTm590045"):
name = part.split(":")[1].strip()[1:].strip('\'')
elif part.startswith("ATTr589970"):
rawRID = part.split(":")[1].strip().strip('\'')
elif part.startswith("ATTk589879"):
rawLMhash = part.split(":")[1].strip().strip('\'')
elif part.startswith("ATTk589914"):
rawNTLMhash = part.split(":")[1].strip().strip('\'')
print decUserHash(bootkey, rawPekKey, name, rawRID, "", rawNTLMhash)
# decrypt/return all user hash histories
def decUserHashHistories(hiveFile,hashFile):
#get the bootkey from the system hive
bootkey = get_syskey(hiveFile)
f = open(hashFile)
raw = f.read()
f.close()
krbtgt_acct = None
rawPekKey = None
rawRID = None
rawNTLMhash = None
rawLMhash = None
rawNTLMhashHistory = None
rawLMhashHistory = None
# split along account boundaries
accts = raw.split("ATTm3")
for acct in accts:
if "ATTk590689" in acct:
for part in acct.split('\n'):
if part.startswith("ATTk590689"):
rawPekKey = part.split(":")[1].strip().strip('\'')
# only examine accts with a valid NTLM hash history
elif "ATTk589918" in acct:
parts = acct.split('\n')
for part in parts:
if part.startswith("ATTm590045"):
name = part.split(":")[1].strip()[1:].strip('\'')
elif part.startswith("ATTr589970"):
rawRID = part.split(":")[1].strip().strip('\'')
elif part.startswith("ATTk589984"):
rawLMhashHistory = part.split(":")[1].strip().strip('\'')
elif part.startswith("ATTk589918"):
rawNTLMhashHistory = part.split(":")[1].strip().strip('\'')
histories = decUserHashHistory(bootkey, rawPekKey, name, rawRID, rawLMhashHistory, rawNTLMhashHistory)
for history in histories:
print history
if len(sys.argv) == 3:
decUserHashes(sys.argv[1], sys.argv[2])
elif len(sys.argv) == 4:
if (sys.argv[3].lower() == "-history"):
decUserHashHistories(sys.argv[1], sys.argv[2])
else:
decKrbtgt(sys.argv[1], sys.argv[2])
elif len(sys.argv) == 5:
bootkey = get_syskey(sys.argv[1])
decUserHash(bootKey, sys.argv[2], "user", sys.argv[3], sys.argv[4])
else:
print "\nFirst dump the datatable using esentutl.py:"
print "\tesentutl.py /path/to/ntds.dit export -table datatable | grep -E \"ATTk590689|ATTm3|ATTm590045|ATTm590045|ATTr589970|ATTk589914|ATTk589879|ATTk589984|ATTk589918\" > outfile.txt\n"
print "Then : %s <system hive> <hash file>" % sys.argv[0]
print "\tor : %s <system hive> <hash file> -krbtgt" % sys.argv[0]
print "\tor : %s <system hive> <hash file> -history" % sys.argv[0]
print "\tor : %s <system hive> <rawPekKey> <rawRid> <rawNTLMhash>\n" % sys.argv[0]
sys.exit(1)