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NetExec/nxc/modules/daclread.py

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import binascii
import codecs
import json
import re
import datetime
from enum import Enum
from impacket.ldap import ldaptypes
from impacket.uuid import bin_to_string
from nxc.helpers.msada_guids import SCHEMA_OBJECTS, EXTENDED_RIGHTS
from ldap3.protocol.formatters.formatters import format_sid
from ldap3.utils.conv import escape_filter_chars
from ldap3.protocol.microsoft import security_descriptor_control
import sys
OBJECT_TYPES_GUID = {}
OBJECT_TYPES_GUID.update(SCHEMA_OBJECTS)
OBJECT_TYPES_GUID.update(EXTENDED_RIGHTS)
# Universal SIDs
WELL_KNOWN_SIDS = {
"S-1-0": "Null Authority",
"S-1-0-0": "Nobody",
"S-1-1": "World Authority",
"S-1-1-0": "Everyone",
"S-1-2": "Local Authority",
"S-1-2-0": "Local",
"S-1-2-1": "Console Logon",
"S-1-3": "Creator Authority",
"S-1-3-0": "Creator Owner",
"S-1-3-1": "Creator Group",
"S-1-3-2": "Creator Owner Server",
"S-1-3-3": "Creator Group Server",
"S-1-3-4": "Owner Rights",
"S-1-5-80-0": "All Services",
"S-1-4": "Non-unique Authority",
"S-1-5": "NT Authority",
"S-1-5-1": "Dialup",
"S-1-5-2": "Network",
"S-1-5-3": "Batch",
"S-1-5-4": "Interactive",
"S-1-5-6": "Service",
"S-1-5-7": "Anonymous",
"S-1-5-8": "Proxy",
"S-1-5-9": "Enterprise Domain Controllers",
"S-1-5-10": "Principal Self",
"S-1-5-11": "Authenticated Users",
"S-1-5-12": "Restricted Code",
"S-1-5-13": "Terminal Server Users",
"S-1-5-14": "Remote Interactive Logon",
"S-1-5-15": "This Organization",
"S-1-5-17": "This Organization",
"S-1-5-18": "Local System",
"S-1-5-19": "NT Authority",
"S-1-5-20": "NT Authority",
"S-1-5-32-544": "Administrators",
"S-1-5-32-545": "Users",
"S-1-5-32-546": "Guests",
"S-1-5-32-547": "Power Users",
"S-1-5-32-548": "Account Operators",
"S-1-5-32-549": "Server Operators",
"S-1-5-32-550": "Print Operators",
"S-1-5-32-551": "Backup Operators",
"S-1-5-32-552": "Replicators",
"S-1-5-64-10": "NTLM Authentication",
"S-1-5-64-14": "SChannel Authentication",
"S-1-5-64-21": "Digest Authority",
"S-1-5-80": "NT Service",
"S-1-5-83-0": "NT VIRTUAL MACHINE\Virtual Machines",
"S-1-16-0": "Untrusted Mandatory Level",
"S-1-16-4096": "Low Mandatory Level",
"S-1-16-8192": "Medium Mandatory Level",
"S-1-16-8448": "Medium Plus Mandatory Level",
"S-1-16-12288": "High Mandatory Level",
"S-1-16-16384": "System Mandatory Level",
"S-1-16-20480": "Protected Process Mandatory Level",
"S-1-16-28672": "Secure Process Mandatory Level",
"S-1-5-32-554": "BUILTIN\Pre-Windows 2000 Compatible Access",
"S-1-5-32-555": "BUILTIN\Remote Desktop Users",
"S-1-5-32-557": "BUILTIN\Incoming Forest Trust Builders",
"S-1-5-32-556": "BUILTIN\\Network Configuration Operators",
"S-1-5-32-558": "BUILTIN\Performance Monitor Users",
"S-1-5-32-559": "BUILTIN\Performance Log Users",
"S-1-5-32-560": "BUILTIN\Windows Authorization Access Group",
"S-1-5-32-561": "BUILTIN\Terminal Server License Servers",
"S-1-5-32-562": "BUILTIN\Distributed COM Users",
"S-1-5-32-569": "BUILTIN\Cryptographic Operators",
"S-1-5-32-573": "BUILTIN\Event Log Readers",
"S-1-5-32-574": "BUILTIN\Certificate Service DCOM Access",
"S-1-5-32-575": "BUILTIN\RDS Remote Access Servers",
"S-1-5-32-576": "BUILTIN\RDS Endpoint Servers",
"S-1-5-32-577": "BUILTIN\RDS Management Servers",
"S-1-5-32-578": "BUILTIN\Hyper-V Administrators",
"S-1-5-32-579": "BUILTIN\Access Control Assistance Operators",
"S-1-5-32-580": "BUILTIN\Remote Management Users",
}
# GUID rights enum
# GUID thats permits to identify extended rights in an ACE
# https://docs.microsoft.com/en-us/windows/win32/adschema/a-rightsguid
class RIGHTS_GUID(Enum):
WriteMembers = "bf9679c0-0de6-11d0-a285-00aa003049e2"
ResetPassword = "00299570-246d-11d0-a768-00aa006e0529"
DS_Replication_Get_Changes = "1131f6aa-9c07-11d1-f79f-00c04fc2dcd2"
DS_Replication_Get_Changes_All = "1131f6ad-9c07-11d1-f79f-00c04fc2dcd2"
# ACE flags enum
# New ACE at the end of SACL for inheritance and access return system-audit
# https://docs.microsoft.com/en-us/windows/win32/api/securitybaseapi/nf-securitybaseapi-addauditaccessobjectace
class ACE_FLAGS(Enum):
CONTAINER_INHERIT_ACE = ldaptypes.ACE.CONTAINER_INHERIT_ACE
FAILED_ACCESS_ACE_FLAG = ldaptypes.ACE.FAILED_ACCESS_ACE_FLAG
INHERIT_ONLY_ACE = ldaptypes.ACE.INHERIT_ONLY_ACE
INHERITED_ACE = ldaptypes.ACE.INHERITED_ACE
NO_PROPAGATE_INHERIT_ACE = ldaptypes.ACE.NO_PROPAGATE_INHERIT_ACE
OBJECT_INHERIT_ACE = ldaptypes.ACE.OBJECT_INHERIT_ACE
SUCCESSFUL_ACCESS_ACE_FLAG = ldaptypes.ACE.SUCCESSFUL_ACCESS_ACE_FLAG
# ACE flags enum
# For an ACE, flags that indicate if the ObjectType and the InheritedObjecType are set with a GUID
# Since these two flags are the same for Allowed and Denied access, the same class will be used from 'ldaptypes'
# https://docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-access_allowed_object_ace
class OBJECT_ACE_FLAGS(Enum):
ACE_OBJECT_TYPE_PRESENT = ldaptypes.ACCESS_ALLOWED_OBJECT_ACE.ACE_OBJECT_TYPE_PRESENT
ACE_INHERITED_OBJECT_TYPE_PRESENT = ldaptypes.ACCESS_ALLOWED_OBJECT_ACE.ACE_INHERITED_OBJECT_TYPE_PRESENT
# Access Mask enum
# Access mask permits to encode principal's rights to an object. This is the rights the principal behind the specified SID has
# https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-dtyp/7a53f60e-e730-4dfe-bbe9-b21b62eb790b
# https://docs.microsoft.com/en-us/windows/win32/api/iads/ne-iads-ads_rights_enum?redirectedfrom=MSDN
class ACCESS_MASK(Enum):
# Generic Rights
GenericRead = 0x80000000 # ADS_RIGHT_GENERIC_READ
GenericWrite = 0x40000000 # ADS_RIGHT_GENERIC_WRITE
GenericExecute = 0x20000000 # ADS_RIGHT_GENERIC_EXECUTE
GenericAll = 0x10000000 # ADS_RIGHT_GENERIC_ALL
# Maximum Allowed access type
MaximumAllowed = 0x02000000
# Access System Acl access type
AccessSystemSecurity = 0x01000000 # ADS_RIGHT_ACCESS_SYSTEM_SECURITY
# Standard access types
Synchronize = 0x00100000 # ADS_RIGHT_SYNCHRONIZE
WriteOwner = 0x00080000 # ADS_RIGHT_WRITE_OWNER
WriteDACL = 0x00040000 # ADS_RIGHT_WRITE_DAC
ReadControl = 0x00020000 # ADS_RIGHT_READ_CONTROL
Delete = 0x00010000 # ADS_RIGHT_DELETE
# Specific rights
AllExtendedRights = 0x00000100 # ADS_RIGHT_DS_CONTROL_ACCESS
ListObject = 0x00000080 # ADS_RIGHT_DS_LIST_OBJECT
DeleteTree = 0x00000040 # ADS_RIGHT_DS_DELETE_TREE
WriteProperties = 0x00000020 # ADS_RIGHT_DS_WRITE_PROP
ReadProperties = 0x00000010 # ADS_RIGHT_DS_READ_PROP
Self = 0x00000008 # ADS_RIGHT_DS_SELF
ListChildObjects = 0x00000004 # ADS_RIGHT_ACTRL_DS_LIST
DeleteChild = 0x00000002 # ADS_RIGHT_DS_DELETE_CHILD
CreateChild = 0x00000001 # ADS_RIGHT_DS_CREATE_CHILD
# Simple permissions enum
# Simple permissions are combinaisons of extended permissions
# https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc783530(v=ws.10)?redirectedfrom=MSDN
class SIMPLE_PERMISSIONS(Enum):
FullControl = 0xF01FF
Modify = 0x0301BF
ReadAndExecute = 0x0200A9
ReadAndWrite = 0x02019F
Read = 0x20094
Write = 0x200BC
# Mask ObjectType field enum
# Possible values for the Mask field in object-specific ACE (permitting to specify extended rights in the ObjectType field for example)
# Since these flags are the same for Allowed and Denied access, the same class will be used from 'ldaptypes'
# https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-dtyp/c79a383c-2b3f-4655-abe7-dcbb7ce0cfbe
class ALLOWED_OBJECT_ACE_MASK_FLAGS(Enum):
ControlAccess = ldaptypes.ACCESS_ALLOWED_OBJECT_ACE.ADS_RIGHT_DS_CONTROL_ACCESS
CreateChild = ldaptypes.ACCESS_ALLOWED_OBJECT_ACE.ADS_RIGHT_DS_CREATE_CHILD
DeleteChild = ldaptypes.ACCESS_ALLOWED_OBJECT_ACE.ADS_RIGHT_DS_DELETE_CHILD
ReadProperty = ldaptypes.ACCESS_ALLOWED_OBJECT_ACE.ADS_RIGHT_DS_READ_PROP
WriteProperty = ldaptypes.ACCESS_ALLOWED_OBJECT_ACE.ADS_RIGHT_DS_WRITE_PROP
Self = ldaptypes.ACCESS_ALLOWED_OBJECT_ACE.ADS_RIGHT_DS_SELF
class NXCModule:
"""Module to read and backup the Discretionary Access Control List of one or multiple objects.
This module is essentially inspired from the dacledit.py script of Impacket that we have coauthored, @_nwodtuhs and me.
It has been converted to an LDAPConnection session, and improvements on the filtering and the ability to specify multiple targets have been added.
It could be interesting to implement the write/remove functions here, but a ldap3 session instead of a LDAPConnection one is required to write.
"""
name = "daclread"
description = "Read and backup the Discretionary Access Control List of objects. Be careful, this module cannot read the DACLS recursively, see more explanation in the options."
supported_protocols = ["ldap"]
opsec_safe = True
multiple_hosts = False
def __init__(self, context=None, module_options=None):
self.context = context
self.module_options = module_options
def options(self, context, module_options):
"""
Be careful, this module cannot read the DACLS recursively.
For example, if an object has particular rights because it belongs to a group, the module will not be able to see it directly, you have to check the group rights manually.
TARGET The objects that we want to read or backup the DACLs, specified by its SamAccountName
TARGET_DN The object that we want to read or backup the DACL, specified by its DN (useful to target the domain itself)
PRINCIPAL The trustee that we want to filter on
ACTION The action to realise on the DACL (read, backup)
ACE_TYPE The type of ACE to read (Allowed or Denied)
RIGHTS An interesting right to filter on ('FullControl', 'ResetPassword', 'WriteMembers', 'DCSync')
RIGHTS_GUID A right GUID that specify a particular rights to filter on
Based on the work of @_nwodtuhs and @BlWasp_.
"""
self.context = context
context.log.debug(f"module_options: {module_options}")
if not module_options:
context.log.fail("Select an option, example: -M daclread -o TARGET=Administrator ACTION=read")
sys.exit(1)
if module_options and "TARGET" in module_options:
context.log.debug("There is a target specified!")
if re.search(r"^(.+)\/([^\/]+)$", module_options["TARGET"]) is not None:
try:
self.target_file = open(module_options["TARGET"]) # noqa: SIM115
self.target_sAMAccountName = None
except Exception:
context.log.fail("The file doesn't exist or cannot be openned.")
else:
context.log.debug(f"Setting target_sAMAccountName to {module_options['TARGET']}")
self.target_sAMAccountName = module_options["TARGET"]
self.target_file = None
self.target_DN = None
self.target_SID = None
if module_options and "TARGET_DN" in module_options:
self.target_DN = module_options["TARGET_DN"]
self.target_sAMAccountName = None
self.target_file = None
if module_options and "PRINCIPAL" in module_options:
self.principal_sAMAccountName = module_options["PRINCIPAL"]
else:
self.principal_sAMAccountName = None
self.principal_sid = None
if module_options and "ACTION" in module_options:
self.action = module_options["ACTION"]
else:
self.action = "read"
if module_options and "ACE_TYPE" in module_options:
self.ace_type = module_options["ACE_TYPE"]
else:
self.ace_type = "allowed"
if module_options and "RIGHTS" in module_options:
self.rights = module_options["RIGHTS"]
else:
self.rights = None
if module_options and "RIGHTS_GUID" in module_options:
self.rights_guid = module_options["RIGHTS_GUID"]
else:
self.rights_guid = None
self.filename = None
def on_login(self, context, connection):
"""On a successful LDAP login we perform a search for the targets' SID, their Security Descriptors and the principal's SID if there is one specified"""
context.log.highlight("Be careful, this module cannot read the DACLS recursively.")
self.baseDN = connection.ldapConnection._baseDN
self.ldap_session = connection.ldapConnection
# Searching for the principal SID
if self.principal_sAMAccountName is not None:
_lookedup_principal = self.principal_sAMAccountName
try:
self.principal_sid = format_sid(
self.ldap_session.search(
searchBase=self.baseDN,
searchFilter=f"(sAMAccountName={escape_filter_chars(_lookedup_principal)})",
attributes=["objectSid"],
)[0][1][0][1][0]
)
context.log.highlight(f"Found principal SID to filter on: {self.principal_sid}")
except Exception:
context.log.fail(f"Principal SID not found in LDAP ({_lookedup_principal})")
sys.exit(1)
# Searching for the targets SID and their Security Descriptors
# If there is only one target
if (self.target_sAMAccountName or self.target_DN) and self.target_file is None:
# Searching for target account with its security descriptor
try:
self.search_target_principal_security_descriptor(context, connection)
# Extract security descriptor data
self.target_principal_dn = self.target_principal[0]
self.principal_raw_security_descriptor = str(self.target_principal[1][0][1][0]).encode("latin-1")
self.principal_security_descriptor = ldaptypes.SR_SECURITY_DESCRIPTOR(data=self.principal_raw_security_descriptor)
context.log.highlight(f"Target principal found in LDAP ({self.target_principal[0]})")
except Exception:
context.log.fail(f"Target SID not found in LDAP ({self.target_sAMAccountName})")
sys.exit(1)
if self.action == "read":
self.read(context)
if self.action == "backup":
self.backup(context)
# If there are multiple targets
else:
targets = self.target_file.readlines()
for target in targets:
try:
self.target_sAMAccountName = target.strip()
# Searching for target account with its security descriptor
self.search_target_principal_security_descriptor(context, connection)
# Extract security descriptor data
self.target_principal_dn = self.target_principal[0]
self.principal_raw_security_descriptor = str(self.target_principal[1][0][1][0]).encode("latin-1")
self.principal_security_descriptor = ldaptypes.SR_SECURITY_DESCRIPTOR(data=self.principal_raw_security_descriptor)
context.log.highlight(f"Target principal found in LDAP ({self.target_sAMAccountName})")
except Exception:
context.log.fail(f"Target SID not found in LDAP ({self.target_sAMAccountName})")
continue
if self.action == "read":
self.read(context)
if self.action == "backup":
self.backup(context)
# Main read funtion
# Prints the parsed DACL
def read(self, context):
parsed_dacl = self.parse_dacl(context, self.principal_security_descriptor["Dacl"])
self.print_parsed_dacl(context, parsed_dacl)
# Permits to export the DACL of the targets
# This function is called before any writing action (write, remove or restore)
def backup(self, context):
backup = {}
backup["sd"] = binascii.hexlify(self.principal_raw_security_descriptor).decode("latin-1")
backup["dn"] = str(self.target_principal_dn)
if not self.filename:
self.filename = "dacledit-{}-{}.bak".format(
datetime.datetime.now().strftime("%Y%m%d-%H%M%S"),
self.target_sAMAccountName,
)
with codecs.open(self.filename, "w", "latin-1") as outfile:
json.dump(backup, outfile)
context.log.highlight("DACL backed up to %s", self.filename)
self.filename = None
# Attempts to retrieve the DACL in the Security Descriptor of the specified target
def search_target_principal_security_descriptor(self, context, connection):
_lookedup_principal = ""
# Set SD flags to only query for DACL
controls = security_descriptor_control(sdflags=0x04)
if self.target_sAMAccountName is not None:
_lookedup_principal = self.target_sAMAccountName
target = self.ldap_session.search(
searchBase=self.baseDN,
searchFilter=f"(sAMAccountName={escape_filter_chars(_lookedup_principal)})",
attributes=["nTSecurityDescriptor"],
searchControls=controls,
)
if self.target_DN is not None:
_lookedup_principal = self.target_DN
target = self.ldap_session.search(
searchBase=self.baseDN,
searchFilter=f"(distinguishedName={_lookedup_principal})",
attributes=["nTSecurityDescriptor"],
searchControls=controls,
)
try:
self.target_principal = target[0]
except Exception:
context.log.fail(f"Principal not found in LDAP ({_lookedup_principal}), probably an LDAP session issue.")
sys.exit(0)
# Attempts to retrieve the SID and Distinguisehd Name from the sAMAccountName
# Not used for the moment
# - samname : a sAMAccountName
def get_user_info(self, context, samname):
self.ldap_session.search(
searchBase=self.baseDN,
searchFilter=f"(sAMAccountName={escape_filter_chars(samname)})",
attributes=["objectSid"],
)
try:
dn = self.ldap_session.entries[0].entry_dn
sid = format_sid(self.ldap_session.entries[0]["objectSid"].raw_values[0])
return dn, sid
except Exception:
context.log.fail(f"User not found in LDAP: {samname}")
return False
# Attempts to resolve a SID and return the corresponding samaccountname
# - sid : the SID to resolve
def resolveSID(self, context, sid):
# Tries to resolve the SID from the well known SIDs
if sid in WELL_KNOWN_SIDS:
return WELL_KNOWN_SIDS[sid]
# Tries to resolve the SID from the LDAP domain dump
else:
try:
self.ldap_session.search(
searchBase=self.baseDN,
searchFilter=f"(objectSid={sid})",
attributes=["sAMAccountName"],
)[0][0]
return self.ldap_session.search(
searchBase=self.baseDN,
searchFilter=f"(objectSid={sid})",
attributes=["sAMAccountName"],
)[0][1][0][1][0]
except Exception:
context.log.debug(f"SID not found in LDAP: {sid}")
return ""
# Parses a full DACL
# - dacl : the DACL to parse, submitted in a Security Desciptor format
def parse_dacl(self, context, dacl):
parsed_dacl = []
context.log.debug("Parsing DACL")
i = 0
for ace in dacl["Data"]:
parsed_ace = self.parse_ace(context, ace)
parsed_dacl.append(parsed_ace)
i += 1
return parsed_dacl
# Parses an access mask to extract the different values from a simple permission
# https://stackoverflow.com/questions/28029872/retrieving-security-descriptor-and-getting-number-for-filesystemrights
def parse_perms(self, access_mask):
perms = [PERM.name for PERM in SIMPLE_PERMISSIONS if (access_mask & PERM.value) == PERM.value]
# use bitwise NOT operator (~) and sum() function to clear the bits that have been processed
access_mask &= ~sum(PERM.value for PERM in SIMPLE_PERMISSIONS if (access_mask & PERM.value) == PERM.value)
perms += [PERM.name for PERM in ACCESS_MASK if access_mask & PERM.value]
return perms
# Parses a specified ACE and extract the different values (Flags, Access Mask, Trustee, ObjectType, InheritedObjectType)
# - ace : the ACE to parse
def parse_ace(self, context, ace):
# For the moment, only the Allowed and Denied Access ACE are supported
if ace["TypeName"] in [
"ACCESS_ALLOWED_ACE",
"ACCESS_ALLOWED_OBJECT_ACE",
"ACCESS_DENIED_ACE",
"ACCESS_DENIED_OBJECT_ACE",
]:
_ace_flags = [FLAG.name for FLAG in ACE_FLAGS if ace.hasFlag(FLAG.value)]
parsed_ace = {"ACE Type": ace["TypeName"], "ACE flags": ", ".join(_ace_flags) or "None"}
# For standard ACE
# Extracts the access mask (by parsing the simple permissions) and the principal's SID
if ace["TypeName"] in ["ACCESS_ALLOWED_ACE", "ACCESS_DENIED_ACE"]:
access_mask = f"{', '.join(self.parse_perms(ace['Ace']['Mask']['Mask']))} (0x{ace['Ace']['Mask']['Mask']:x})"
trustee_sid = f"{self.resolveSID(context, ace['Ace']['Sid'].formatCanonical()) or 'UNKNOWN'} ({ace['Ace']['Sid'].formatCanonical()})"
parsed_ace = {
"Access mask": access_mask,
"Trustee (SID)": trustee_sid
}
elif ace["TypeName"] in ["ACCESS_ALLOWED_OBJECT_ACE", "ACCESS_DENIED_OBJECT_ACE"]: # for object-specific ACE
# Extracts the mask values. These values will indicate the ObjectType purpose
access_mask_flags = [FLAG.name for FLAG in ALLOWED_OBJECT_ACE_MASK_FLAGS if ace["Ace"]["Mask"].hasPriv(FLAG.value)]
parsed_ace["Access mask"] = ", ".join(access_mask_flags)
# Extracts the ACE flag values and the trusted SID
object_flags = [FLAG.name for FLAG in OBJECT_ACE_FLAGS if ace["Ace"].hasFlag(FLAG.value)]
parsed_ace["Flags"] = ", ".join(object_flags) or "None"
# Extracts the ObjectType GUID values
if ace["Ace"]["ObjectTypeLen"] != 0:
obj_type = bin_to_string(ace["Ace"]["ObjectType"]).lower()
try:
parsed_ace["Object type (GUID)"] = f"{OBJECT_TYPES_GUID[obj_type]} ({obj_type})"
except KeyError:
parsed_ace["Object type (GUID)"] = f"UNKNOWN ({obj_type})"
# Extracts the InheritedObjectType GUID values
if ace["Ace"]["InheritedObjectTypeLen"] != 0:
inh_obj_type = bin_to_string(ace["Ace"]["InheritedObjectType"]).lower()
try:
parsed_ace["Inherited type (GUID)"] = f"{OBJECT_TYPES_GUID[inh_obj_type]} ({inh_obj_type})"
except KeyError:
parsed_ace["Inherited type (GUID)"] = f"UNKNOWN ({inh_obj_type})"
# Extract the Trustee SID (the object that has the right over the DACL bearer)
parsed_ace["Trustee (SID)"] = "{} ({})".format(
self.resolveSID(context, ace["Ace"]["Sid"].formatCanonical()) or "UNKNOWN",
ace["Ace"]["Sid"].formatCanonical(),
)
else: # if the ACE is not an access allowed
context.log.debug(f"ACE Type ({ace['TypeName']}) unsupported for parsing yet, feel free to contribute")
_ace_flags = [FLAG.name for FLAG in ACE_FLAGS if ace.hasFlag(FLAG.value)]
parsed_ace = {
"ACE type": ace["TypeName"],
"ACE flags": ", ".join(_ace_flags) or "None",
"DEBUG": "ACE type not supported for parsing by dacleditor.py, feel free to contribute",
}
return parsed_ace
def print_parsed_dacl(self, context, parsed_dacl):
"""Prints a full DACL by printing each parsed ACE
parsed_dacl : a parsed DACL from parse_dacl()
"""
context.log.debug("Printing parsed DACL")
i = 0
# If a specific right or a specific GUID has been specified, only the ACE with this right will be printed
# If an ACE type has been specified, only the ACE with this type will be specified
# If a principal has been specified, only the ACE where he is the trustee will be printed
for parsed_ace in parsed_dacl:
print_ace = True
# Filter on specific rights
if self.rights is not None:
try:
if (self.rights == "FullControl") and (self.rights not in parsed_ace["Access mask"]):
print_ace = False
if (self.rights == "DCSync") and (("Object type (GUID)" not in parsed_ace) or (RIGHTS_GUID.DS_Replication_Get_Changes_All.value not in parsed_ace["Object type (GUID)"])):
print_ace = False
if (self.rights == "WriteMembers") and (("Object type (GUID)" not in parsed_ace) or (RIGHTS_GUID.WriteMembers.value not in parsed_ace["Object type (GUID)"])):
print_ace = False
if (self.rights == "ResetPassword") and (("Object type (GUID)" not in parsed_ace) or (RIGHTS_GUID.ResetPassword.value not in parsed_ace["Object type (GUID)"])):
print_ace = False
except Exception as e:
context.log.fail(f"Error filtering ACE, probably because of ACE type unsupported for parsing yet ({e})")
# Filter on specific right GUID
if self.rights_guid is not None:
try:
if ("Object type (GUID)" not in parsed_ace) or (self.rights_guid not in parsed_ace["Object type (GUID)"]):
print_ace = False
except Exception as e:
context.log.fail(f"Error filtering ACE, probably because of ACE type unsupported for parsing yet ({e})")
# Filter on ACE type
if self.ace_type == "allowed":
try:
if ("ACCESS_ALLOWED_OBJECT_ACE" not in parsed_ace["ACE Type"]) and ("ACCESS_ALLOWED_ACE" not in parsed_ace["ACE Type"]):
print_ace = False
except Exception as e:
context.log.fail(f"Error filtering ACE, probably because of ACE type unsupported for parsing yet ({e})")
else:
try:
if ("ACCESS_DENIED_OBJECT_ACE" not in parsed_ace["ACE Type"]) and ("ACCESS_DENIED_ACE" not in parsed_ace["ACE Type"]):
print_ace = False
except Exception as e:
context.log.fail(f"Error filtering ACE, probably because of ACE type unsupported for parsing yet ({e})")
# Filter on trusted principal
if self.principal_sid is not None:
try:
if self.principal_sid not in parsed_ace["Trustee (SID)"]:
print_ace = False
except Exception as e:
context.log.fail(f"Error filtering ACE, probably because of ACE type unsupported for parsing yet ({e})")
if print_ace:
self.context.log.highlight("%-28s" % "ACE[%d] info" % i)
self.print_parsed_ace(parsed_ace)
i += 1
# Prints properly a parsed ACE
# - parsed_ace : a parsed ACE from parse_ace()
def print_parsed_ace(self, parsed_ace):
elements_name = list(parsed_ace.keys())
for attribute in elements_name:
self.context.log.highlight(" %-26s: %s" % (attribute, parsed_ace[attribute]))
# Retrieves the GUIDs for the specified rights
def build_guids_for_rights(self):
_rights_guids = []
if self.rights_guid is not None:
_rights_guids = [self.rights_guid]
elif self.rights == "WriteMembers":
_rights_guids = [RIGHTS_GUID.WriteMembers.value]
elif self.rights == "ResetPassword":
_rights_guids = [RIGHTS_GUID.ResetPassword.value]
elif self.rights == "DCSync":
_rights_guids = [
RIGHTS_GUID.DS_Replication_Get_Changes.value,
RIGHTS_GUID.DS_Replication_Get_Changes_All.value,
]
self.context.log.highlight("Built GUID: %s", _rights_guids)
return _rights_guids
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