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updated decode-spam-headers.py

This commit is contained in:
mgeeky 2021-10-28 19:45:41 +02:00
parent 6b89dcda24
commit 09093a8b81
1 changed files with 34 additions and 15 deletions
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49
phishing/decode-spam-headers/decode-spam-headers.py
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@ -576,7 +576,7 @@ class SMTPHeadersAnalysis:
'BLK' : logger.colored('Filtering was skipped and the message was blocked because it was sent from an address in a user\'s Blocked Senders list.', 'red'), 'BLK' : logger.colored('Filtering was skipped and the message was blocked because it was sent from an address in a user\'s Blocked Senders list.', 'red'),
'NSPM' : logger.colored('Spam filtering marked the message as non-spam and the message was sent to the intended recipients.', 'green'), 'NSPM' : logger.colored('Spam filtering marked the message as non-spam and the message was sent to the intended recipients.', 'green'),
'SFE' : logger.colored('Filtering was skipped and the message was allowed because it was sent from an address in a user\'s Safe Senders list.', 'green'), 'SFE' : logger.colored('Filtering was skipped and the message was allowed because it was sent from an address in a user\'s Safe Senders list.', 'green'),
'SKA' : 'The message skipped spam filtering and was delivered to the Inbox because the sender was in the allowed senders list or allowed domains list in an anti-spam policy.', 'SKA' : logger.colored('The message skipped spam filtering and was delivered to the Inbox because the sender was in the allowed senders list or allowed domains list in an anti-spam policy.', 'green'),
'SKB' : logger.colored('The message was marked as spam because it matched a sender in the blocked senders list or blocked domains list in an anti-spam policy.', 'red'), 'SKB' : logger.colored('The message was marked as spam because it matched a sender in the blocked senders list or blocked domains list in an anti-spam policy.', 'red'),
'SKI' : 'Similar to SFV:SKN, the message skipped spam filtering for another reason (for example, an intra-organizational email within a tenant).', 'SKI' : 'Similar to SFV:SKN, the message skipped spam filtering for another reason (for example, an intra-organizational email within a tenant).',
'SKN' : logger.colored('The message was marked as non-spam prior to being processed by spam filtering. For example, the message was marked as SCL -1 or Bypass spam filtering by a mail flow rule.', 'green'), 'SKN' : logger.colored('The message was marked as non-spam prior to being processed by spam filtering. For example, the message was marked as SCL -1 or Bypass spam filtering by a mail flow rule.', 'green'),
@ -3074,7 +3074,8 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
_domain1 = SMTPHeadersAnalysis.extractDomain(_domain) _domain1 = SMTPHeadersAnalysis.extractDomain(_domain)
if _domain1.lower() == firstHopDomain1: if _domain1.lower() == firstHopDomain1:
result += self.logger.colored(f'\n\t- First Hop ({firstHopDomain1}) is authorized to send e-mails on behalf of ({domain}) due to SPF records.\n\n', 'green') result += self.logger.colored(f'\n\t- [+] First Hop ({firstHopDomain1}) is authorized to send e-mails on behalf of ({domain}) due to SPF records.\n', 'yellow')
result += '\t- So I\'m not sure if there was Domain Impersonation or not, but my best guess is negative.\n'
spf = True spf = True
break break
@ -3179,7 +3180,7 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
for prop in props: for prop in props:
if prop in SMTPHeadersAnalysis.ATP_Message_Properties.keys(): if prop in SMTPHeadersAnalysis.ATP_Message_Properties.keys():
result += f'- ' + self.logger.colored(SMTPHeadersAnalysis.ATP_Message_Properties[prop], 'magenta') + '\n' result += f'\t- ' + self.logger.colored(SMTPHeadersAnalysis.ATP_Message_Properties[prop], 'magenta') + '\n'
return { return {
'header' : header, 'header' : header,
@ -3469,7 +3470,8 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
elif match2: elif match2:
obj['ip'] = match2.group(1) obj['ip'] = match2.group(1)
path.append(obj) if len(obj) > 0:
path.append(obj)
if n2 != -1: if n2 != -1:
path.append({ path.append({
@ -3608,7 +3610,7 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
levels.sort() levels.sort()
if scl in levels: if scl in levels:
tmp += '\t' + SMTPHeadersAnalysis.ForeFront_Bulk_Confidence_Levels[scl] + '\n' tmp += '\t- ' + SMTPHeadersAnalysis.ForeFront_Bulk_Confidence_Levels[scl] + '\n'
else: else:
for i in range(len(levels)): for i in range(len(levels)):
@ -4104,9 +4106,6 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
if words[0] != 'pass': if words[0] != 'pass':
result += self.logger.colored(f'- Received-SPF test failed', 'red') + ': Should be "pass", but was: "' + str(words[0]) + '"\n' result += self.logger.colored(f'- Received-SPF test failed', 'red') + ': Should be "pass", but was: "' + str(words[0]) + '"\n'
if words[0] in SMTPHeadersAnalysis.auth_result.keys():
result += '\t- Meaning: ' + str(SMTPHeadersAnalysis.auth_result[words[0]]) + '\n\n'
if len(result) == 0: if len(result) == 0:
return [] return []
@ -4168,7 +4167,7 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
result += self.logger.colored(f'- {k.upper()} test failed:', 'red') + f' Should be "{p}", but was: "' + p2 + '"\n' result += self.logger.colored(f'- {k.upper()} test failed:', 'red') + f' Should be "{p}", but was: "' + p2 + '"\n'
if tests[k] in SMTPHeadersAnalysis.auth_result.keys(): if k.lower() == 'dkim' and tests[k] in SMTPHeadersAnalysis.auth_result.keys():
result += '\t- Meaning: ' + SMTPHeadersAnalysis.auth_result[tests[k]] + '\n\n' result += '\t- Meaning: ' + SMTPHeadersAnalysis.auth_result[tests[k]] + '\n\n'
if len(result) == 0: if len(result) == 0:
@ -4184,6 +4183,7 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
def testExtractIP(self): def testExtractIP(self):
addresses = re.findall(r'([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})', self.text) addresses = re.findall(r'([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})', self.text)
result = '' result = ''
tmp = ''
resolved = set() resolved = set()
if len(addresses) == 0: return [] if len(addresses) == 0: return []
@ -4201,13 +4201,21 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
out = SMTPHeadersAnalysis.resolveAddress(ipaddr) out = SMTPHeadersAnalysis.resolveAddress(ipaddr)
addr = self.logger.colored(addr, 'magenta') addr = self.logger.colored(addr, 'magenta')
result += f'\t- Found IP address: ({addr}) that resolves to: {out[0]}\n' tmp += f'\t- Found IP address: ({addr}) that resolves to: {out[0]}\n'
else: else:
addr = self.logger.colored(addr, 'magenta') addr = self.logger.colored(addr, 'magenta')
result += f'\t- Found IP address: ({addr})\n' tmp += f'\t- Found IP address: ({addr})\n'
except Exception as e: except Exception as e:
result += f'\t- Found IP address: ({addr}) that wasn\'t resolved\n' tmp += f'\t- Found IP address: ({addr}) that wasn\'t resolved\n'
if len(tmp) > 0:
if self.resolve:
result = '\n\t- Extracted IP addresses from headers and attempted resolve them:\n\n'
else:
result = '\n\t- Extracted IP addresses from headers:\n\n'
result += tmp
if len(resolved) == 0: if len(resolved) == 0:
return [] return []
@ -4223,6 +4231,7 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
domains = set(re.findall(r'([a-zA-Z0-9_\-\.]+\.[a-zA-Z]{2,})', self.text, re.I)) domains = set(re.findall(r'([a-zA-Z0-9_\-\.]+\.[a-zA-Z]{2,})', self.text, re.I))
resolved = set() resolved = set()
result = '' result = ''
tmp = ''
skip = ( skip = (
'smtp.mailfrom', 'smtp.mailfrom',
@ -4239,6 +4248,8 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
try: try:
resolved.add(d) resolved.add(d)
d2 = self.colorizeKeywords(d)
if self.resolve: if self.resolve:
self.logger.dbg(f'testResolveIntoIP: Resolving {d}...') self.logger.dbg(f'testResolveIntoIP: Resolving {d}...')
out = socket.gethostbyname(d) out = socket.gethostbyname(d)
@ -4246,13 +4257,21 @@ Src: https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA
if type(out) == list: if type(out) == list:
out = out[0] out = out[0]
result += f'\t- Found Domain: {self.logger.colored(d, "magenta")}\n\t\t- that resolves to: {out}\n' tmp += f'\t- Found Domain: {d2}\n\t\t- that resolves to: {out}\n'
else: else:
result += f'\t- Found Domain: {self.logger.colored(d, "magenta")}\n' tmp += f'\t- Found Domain: {d2}\n'
except Exception as e: except Exception as e:
result += f'\t- Found Domain: ({self.logger.colored(d, "magenta")}) that wasn\'t resolved\n' tmp += f'\t- Found Domain: ({self.logger.colored(d, "magenta")}) that wasn\'t resolved\n'
if len(tmp) > 0:
if self.resolve:
result = '\n\t- Extracted domains from headers and attempted resolve them:\n\n'
else:
result = '\n\t- Extracted domains from headers:\n\n'
result += tmp
if len(resolved) == 0: if len(resolved) == 0:
return [] return []