Einführung der kennwortgeschützten Dateianalyse (PPFA)

Einleitung

Dieses Dokument beschreibt die neue kennwortgeschützte Dateianalyse (Password Protected File Analysis, PPFA), die der E-Mail Security Appliance (ESA) Version 14.X hinzugefügt wurde.

Voraussetzungen

Anforderungen

Cisco empfiehlt, dass Sie über Kenntnisse der ESA-Konzepte und -Konfigurationen verfügen.

Verwendete Komponenten

Die Informationen in diesem Dokument basieren auf AsyncOS für ESA 14.0 und höher.

Die Informationen in diesem Dokument beziehen sich auf Geräte in einer speziell eingerichteten Testumgebung. Alle Geräte, die in diesem Dokument benutzt wurden, begannen mit einer gelöschten (Nichterfüllungs) Konfiguration. Wenn Ihr Netzwerk in Betrieb ist, stellen Sie sicher, dass Sie die möglichen Auswirkungen aller Befehle kennen.

Hintergrundinformationen

Bisher konnte der Inhalt eines kennwortgeschützten Dokuments oder Archivdateianhangs, wie PDF, Doc, ZIP usw. nicht analysiert werden, da das Kennwort unbekannt war.

Mit der Einführung von PPFA können E-Mails, die kennwortgeschützte Dateianhänge enthalten, auf schädliche Aktivitäten und Datenschutz analysiert werden, wenn das Kennwort im E-Mail-Text vorhanden ist.

Unterstützte Formate und Sprachen

Hier ist eine Liste der unterstützten Formate:

• PDF
• MS Office-Datei

doc/x 2007-2019 / doc 2002 bis 2004

xls/x 2007-2019

ppt/x 2007-2019

• Archiv

zip, rar, 7z

Hier finden Sie die Liste der unterstützten Sprachen: 

   

Überlegungen

PPFA ist standardmäßig deaktiviert.

Passwortgeschützte Dateianhänge können derzeit nur analysiert werden, wenn das Passwort im E-Mail-Text vorhanden ist. Bei den Kennwörtern wird die Groß- und Kleinschreibung beachtet, und es wird kein Leerzeichen erkannt. 

Eine Liste mit bis zu 5 Passwörtern, die von admin bereitgestellt wird, wird nun unterstützt.

Konfigurationsschritte

Grafische Benutzeroberfläche (GUI)

Um PPFA über die GUI zu konfigurieren, navigieren Sie zu Security Service > Scan Behavior > Edit Global Settings > Scanning of Password-protected Attachments > und wählen Sie Enable for Inbound Mail traffic/Outbound Mail Traffic or Both > Submit > Commit.

Befehlszeilenschnittstelle (CLI)

Um PPFA über die CLI zu konfigurieren, führen Sie den Befehl scanconfig > PROTECTEDATTACHMENTCONFIG > Commit aus.

(ESA_CLI) (SERVICE)> scanconfig

NOTICE: This configuration command has not yet been configured for the current cluster mode (Machine esa1.lab.cisco.com).

What would you like to do?
1. Switch modes to edit at mode "Cluster ESA_BETA_CLUSTER".
2. Start a new, empty configuration at the current mode (Machine esa1.lab.cisco.com).
3. Copy settings from another cluster mode to the current mode (Machine esa1.lab.cisco.com).
[1]>


There are currently 5 attachment type mappings configured to be SKIPPED.

Choose the operation you want to perform:
- NEW - Add a new entry.
- DELETE - Remove an entry.
- SETUP - Configure scanning behavior.
- IMPORT - Load mappings from a file.
- EXPORT - Save mappings to a file.
- PRINT - Display the list.
- CLEAR - Remove all entries.
- SMIME - Configure S/MIME unpacking.
- SAFEPRINT - Configure safeprint settings.
- PROTECTEDATTACHMENTCONFIG - Scan password protected attachments.
- CLUSTERSET - Set how scanconfig is configured in a cluster.
- CLUSTERSHOW - Display how scanconfig is configured in a cluster.
[]> PROTECTEDATTACHMENTCONFIG

Scanning of password-protected attachments for inbound mails: enabled.
Scanning of password-protected attachments for outbound mails: enabled.

Do you want to scan password-protected attachments for inbound mails? y/n [Y]>

Do you want to scan password-protected attachments for outbound mails? y/n [Y]>

Scan password protected attachments configuration unchanged.

Um die maximale Anzahl von Kennwörtern zu erhöhen, die aus einem E-Mail-Text extrahiert werden, kann der ausgeblendete Befehl "scanconfig > password_list_size" in der CLI verwendet werden. Sie können maximal 10 Kennwörter konfigurieren.

(ESA_CLI) (SERVICE)> scanconfig
There are currently 5 attachment type mappings configured to be SKIPPED.

Choose the operation you want to perform:
- NEW - Add a new entry.
- DELETE - Remove an entry.
- SETUP - Configure scanning behavior.
- IMPORT - Load mappings from a file.
- EXPORT - Save mappings to a file.
- PRINT - Display the list.
- CLEAR - Remove all entries.
- SMIME - Configure S/MIME unpacking.
- SAFEPRINT - Configure safeprint settings.
- PROTECTEDATTACHMENTCONFIG - Scan password protected attachments.
- CLUSTERSET - Set how scanconfig is configured in a cluster.
- CLUSTERSHOW - Display how scanconfig is configured in a cluster.
[]> password_list_size

Enter maximum number of passwords to process:
[5]> 1000

Value must be an integer from 1 to 10.

Enter maximum number of passwords to process:
[5]> 10

Password list size is changed.

Fehlerbehebung und Verifizierung

In diesem Beispiel filtert der Inhalt mit Bedingungen:

1. Der Inhalt der Anlage enthält "Test" und
2. if attachment is password protected

dann Aktion ist log "!!!!!Datei ist passwortgeschützt!!!!!"

Überprüfung von CLI für erfolgreichen Prozess

a) In CLI von mail_logs können Sie Folgendes sehen:

Wed Feb 24 12:11:59 2022 Info: Start MID 22178287 ICID 122555
Wed Feb 24 12:11:59 2022 Info: MID 22178287 ICID 122555 From: 
     
     
       Wed Feb 24 12:11:59 2022 Info: MID 22178287 ICID 122555 RID 0 To: 
      
        Wed Feb 24 12:11:59 2022 Info: MID 22178287 using engine: SPF Verdict Cache using cached verdict Wed Feb 24 12:11:59 2022 Info: MID 22178287 SPF: helo identity postmaster@[10.0.201.16] None Wed Feb 24 12:11:59 2022 Info: MID 22178287 using engine: SPF Verdict Cache using cached verdict Wed Feb 24 12:11:59 2022 Info: MID 22178287 SPF: mailfrom identity test@lab.cisco.com Pass (v=spf1) Wed Feb 24 12:11:59 2022 Info: MID 22178287 using engine: SPF Verdict Cache using cached verdict Wed Feb 24 12:11:59 2022 Info: MID 22178287 SPF: pra identity test@lab.cisco.com None headers from Wed Feb 24 12:11:59 2022 Info: MID 22178287 DMARC: Message from domain lab.cisco.com, DMARC pass (SPF aligned True, DKIM aligned False) Wed Feb 24 12:11:59 2022 Info: MID 22178287 DMARC: Verification passed Wed Feb 24 12:11:59 2022 Info: MID 22178287 Message-ID '<4be194cc-4c95-9d15-6528-81a05dc56a66@lab.cisco.com>' Wed Feb 24 12:11:59 2022 Info: MID 22178287 Subject ppfa test with xls Wed Feb 24 12:11:59 2022 Info: MID 22178287 SDR: Domains for which SDR is requested: reverse DNS host: Not Present, helo: [10.0.201.16], env-from: lab.cisco, header-from: lab.cisco.com, reply-to: Not Present Wed Feb 24 12:11:59 2022 Info: MID 22178287 SDR: Consolidated Sender Reputation: Tainted, Threat Category: N/A, Suspected Domain(s) : test@lab.cisco.com. Youngest Domain Age: 4 months 14 days for domain: test@lab.cisco.com Wed Feb 24 12:11:59 2022 Info: MID 22178287 SDR: Tracker Header : 1+lIjVgkzfH9oTTP+SaBrzZC3Gs6TTYhJbW8D/pjF0eP1U48Yn65OgvVF9VjL6RgIIYi/H6sTg4VSq/leHowYXwYz/1wmYQCDwFFhTTfkLqs/GuqB1ynXwqZRXi2TiSkkHHrJbo+6IUpze9pVWWlgvZomvY7LindREsvoMzHCYesMkNci5Ko0u0m9D1Fz5SoCuVsofk0dbf9rjydhcP4aGxNOTd99njpfkGqdTbZIBv1mBsIS5fRYaDSEEntbcJkuVq3V5ShYK2HZPfKAbzllBxstwYWM0kRe8uIFfiGuCFqDtPaQ1Fb2avNo1MKwLKL Wed Feb 24 12:11:59 2022 Info: MID 22178287 ready 22082 bytes from 
       
         Wed Feb 24 12:11:59 2022 Info: LDAP: Masquerade query LDAP.masquerade MID 22178287 address test@lab.cisco.com to test@lab.cisco.com Wed Feb 24 12:11:59 2022 Info: LDAP: Masquerade query LDAP.masquerade MID 22178287 address test@lab.cisco.com to test@lab.cisco.com Wed Feb 24 12:11:59 2022 Info: MID 22178287 attachment 'testfile.xlsx' Wed Feb 24 12:12:01 2022 Info: MID 22178287 matched all recipients for per-recipient policy test1 in the inbound table Wed Feb 24 12:12:04 2022 Info: MID 22178287 interim verdict using engine: CASE spam negative Wed Feb 24 12:12:04 2022 Info: MID 22178287 using engine: CASE spam negative Wed Feb 24 12:12:04 2022 Info: MID 22178287 interim AV verdict using McAfee ENCRYPTED Wed Feb 24 12:12:04 2022 Info: MID 22178287 interim AV verdict using Sophos ENCRYPTED Wed Feb 24 12:12:04 2022 Info: MID 22178287 antivirus encrypted Wed Feb 24 12:12:04 2022 Info: MID 22178287 AMP file reputation verdict : UNKNOWN(File analysis pending) Wed Feb 24 12:12:04 2022 Info: MID 22178287 SHA d1e67e9640c598162b891028d967d2e5621d0c1bc1141ef2cec21a0ee1087349 filename testfile.xlsx queued for possible file analysis upload Wed Feb 24 12:12:04 2022 Info: MID 22178287 using engine: GRAYMAIL negative Wed Feb 24 12:12:04 2022 Info: MID 22178287 Custom Log Entry: !!!!!!!!!file is passwordprotected!!!!!!!!! Wed Feb 24 12:12:04 2022 Info: MID 22178287 Unable to safe print the attachment, Filename: testfile.xlsx, Reason: The attachment is encrypted, Action: The attachment is stripped Wed Feb 24 12:12:04 2022 Info: MID 22178287 rewritten to MID 22178289 by safeprint-all-attachments-strip-unscan filter 'PDF-Safeprint' Wed Feb 24 12:12:04 2022 Info: Message finished MID 22178287 done 
        
       
     

b) Aus content_scanner-Protokollen können Sie sehen, ob die Datei erfolgreich extrahiert wurde 

Wed Feb 24 12:12:01 2022 Info: PF: MID 22178287 The password-protected file - "testfile.xlsx" is scanned successfully.

c) Aus amp_logs können Sie sehen, dass die extrahierte Datei jetzt zur Analyse an Advanced Malware Protection (AMP) und Dateianalyse gesendet wird.

Tue Mar 16 11:21:03 2022 Info:   File reputation query initiating. File Name = 'testfile.zip', MID = 22194509, File Size = 706376 bytes, File Type = application/zip
Tue Mar 16 11:21:03 2022 Info:   Response received for file reputation query from Cloud. File Name = 'testfile.zip', MID = 22194509, Disposition = FILE UNKNOWN, Malware = None, Analysis Score = 0, sha256 = fb997bf3891f81edc3a4292c22d9fa7fbfc652756eec5e9b7ffd431581694f5b, upload_action = Reco
mmended to send the file for analysis, verdict_source = None
Tue Mar 16 11:21:03 2022 Info:   Compressed/Archive File: sha256 = fb997bf3891f81edc3a4292c22d9fa7fbfc652756eec5e9b7ffd431581694f5b MID = 22194509, Extracted File: File Name = 'testfile.exe', File Type = 'application/x-dosexec', sha256 = f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb
962427f8aa, Disposition = FILE UNKNOWN, Response received from = Cloud, Malware = None, Analysis Score = 0, upload_action = Recommended to send the file for analysis
Tue Mar 16 11:21:04 2022 Info:   File uploaded for preclassification. SHA256: f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa, file name: testfile.exe
Tue Mar 16 11:21:31 2022 Info:   File uploaded for analysis. SHA256: f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa, file name: testfile.exe

d) Wenn sich amp_logs auf der Debug-Ebene befindet, können Sie weitere Informationen zu einer kennwortgeschützten Datei sehen:

 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_supported_file_mime: Supported mime : application/zip
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: _amp_unarchv_mem2file - in_buf=0x96682000, size=706376, ctext=0x0, parent=0x0
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: password is Cisco
Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_context_create - ctext=0x96610ec0
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: archive size = 706376, max archive size=14127520
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: password is Cisco
Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_context_create - ctext=0x96610ec0
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: archive size = 706376, max archive size=14127520
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_make_dated_dir - path=/data/tmp/amp/2022_03_16
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: update_full_pathname entered - path=/data/tmp/amp/2022_03_16, filename=testfile.exe, suffix=#amp_1_1615911663
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: update_full_pathname - archive_entry_set_pathname, /data/tmp/amp/2022_03_16/testfile.exe#amp_1_1615911663
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_queue_entry_insert - ctext=0x96610ec0, parent=0x0, pathname=/data/tmp/amp/2022_03_16/testfile.exe#amp_1_1615911663
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: _amp_unarchv_file2file - ctext=0x96610ec0, parent_qe=0x9666a2e0, filename=/data/tmp/amp/2022_03_16/testfile.exe#amp_1_1615911663
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: Unsupported file type: application/x-dosexec
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: _amp_unarchv_mem2file - in_buf=0x97284000, size=1096080, ctext=0x96610ec0, parent=0x9666a2e0
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: _amp_unarchv_mem2file - decode depth (0)
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: _amp_unarchv_file2file - archive cumulative size=1096080  no.of files=1
 Tue Mar 16 11:21:03 2022   AMPPyrex:-   AMP-INFO: set_analysis_params do_sandbox=0, do_analysis=0,file_mime=application/zip, file priortiy=0 preclass_type=2
Tue Mar 16 11:21:03 2022   AMPPyrex:-   AMP-INFO: set_analysis_params do_sandbox=1, do_analysis=1,file_mime=application/x-dosexec, file priortiy=0 preclass_type=4
Tue Mar 16 11:21:03 2022 AMPCloudIF:-  AMP-DEBUG: AMP Query Request, FileType[0] SHA256[fb997bf3891f81edc3a4292c22d9fa7fbfc652756eec5e9b7ffd431581694f5b]

......

ue Mar 16 11:21:03 2022  CloudPool:-  AMP-DEBUG: cb in callback_thread
Tue Mar 16 11:21:03 2022 AMPCloudIF:-  AMP-DEBUG: AMP Query Response[Cloud], SHA256[fb997bf3891f81edc3a4292c22d9fa7fbfc652756eec5e9b7ffd431581694f5b], disposition[1] score[0] score_tg[0] score_type[0] SpyName[] action[1]
 Tue Mar 16 11:21:03 2022 CacheUtils:-  AMP-DEBUG: Found SHA256: - SHA256::fb997bf3891f81edc3a4292c22d9fa7fbfc652756eec5e9b7ffd431581694f5b
Tue Mar 16 11:21:03 2022  CloudPool:-  AMP-DEBUG: imcloud callback thread going to sleep
Tue Mar 16 11:21:03 2022 VRTCloudIF:-  AMP-DEBUG: Status List, Server Response HTTP code:[200]
Tue Mar 16 11:21:03 2022 CacheUtils:-  AMP-DEBUG: Found SHA256: - SHA256::f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa
Tue Mar 16 11:21:03 2022 VRTCloudIF:-  AMP-DEBUG: File SHA256[f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa] pri - [0] is enqueued to vrt
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_entry_preserve_file - ctext=0x96610ec0, pathname=/data/tmp/amp/2022_03_16/testfile.exe#amp_1_1615911663
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_entry_preserve_file - preserved  pathname=/data/tmp/amp/2022_03_16/testfile.exe#amp_1_1615911663
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_context_delete - ctext=0x96610ec0
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_queue_entry_free - entry=0x9666a2e0, pathname=/data/tmp/amp/2022_03_16/testfile.exe#amp_1_1615911663 file_mime =application/x-dosexec, preserved=1
 Tue Mar 16 11:21:03 2022  Unarchive:-  AMP-DEBUG: amp_context_free - ctext=0x96610ec0
 Tue Mar 16 11:21:03 2022     AMPRPC:-   AMP-INFO: Adjusted verdict - {'file_type': 'application/zip', 'file_name': 'testfile.zip', 'verdict_source': None, 'spyname': '', 'custom_threshold': None, 'unscan_category': None, 'category': 'amp', 'original_verdict': 'FILE UNKNOWN', 'analysis_statu
s': 1, 'analysis_score': 0, 'score': 0, 'sha256': 'fb997bf3891f81edc3a4292c22d9fa7fbfc652756eec5e9b7ffd431581694f5b', 'verdict_str': 'FILE UNKNOWN', 'uploaded': False, 'verdict_from': 'Cloud', 'xid': 22194509, 'verdict_num': 1, 'blacklisted': False, 'extract_file_verdict_list': deque([{'c
ategory': 'amp', 'uploaded': True, 'original_verdict': 'FILE UNKNOWN', 'analysis_status': 4, 'verdict_num': 1, 'analysis_score': 0, 'file_type': 'application/x-dosexec', 'file_name': 'testfile.exe', 'verdict_source': None, 'verdict_from': 'Cloud', 'spyname': '', 'score': 0, 'unscan_category'
: None, 'upload_reason': None, 'sha256': 'f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa', 'verdict_str': 'FILE UNKNOWN', 'analysis_action': 1, 'blacklisted': False}]), 'analysis_action': 1, 'verdict': 'FILE UNKNOWN', 'error': None}
Tue Mar 16 11:21:03 2022 VRTCloudIF:-  AMP-DEBUG: Set curl options URL[https://tg1-clean.lab.cisco.com/csa/v3/run/file?apikey=qg8ecq3n5c9ld4inbps783g263&async=true&classify=true], Trust Store[/data/fire_amp/db/preserve/private_cert.pem]
 Tue Mar 16 11:21:03 2022 VRTCloudIF:-  AMP-DEBUG: {"message":"Success","hash":"f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa","base_url":"https://tg1-clean.lab.cisco.com","entitlement_buffer_info":{"used":0,"available":true,"available_on":"2022-03-16T16:21:03Z"},"anal
yzing":"unknown","sample":"d5c8d83543d92c0cc428d6377d1c665d","query":"https://tg1-clean.lab.cisco.com/csa/v3/report?sample=d5c8d83543d92c0cc428d6377d1c665d"}
 Tue Mar 16 11:21:03 2022 VRTCloudIF:-  AMP-DEBUG:  File upload successful filename testfile.exe
 Tue Mar 16 11:21:03 2022 CacheUtils:-  AMP-DEBUG: Found SHA256: - SHA256::f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa
Tue Mar 16 11:21:03 2022 VRTCloudIF:-  AMP-DEBUG: File SHA256[f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa], file mime[application/x-dosexec], upload priority[High] successfully uploaded to the VRT server.
Tue Mar 16 11:21:03 2022   AMPPyrex:-   AMP-INFO: Upload SHA[f2d2638afb528c7476c9ee8e83ddb20e686b0b05f53f2f966fd9eb962427f8aa] runid=0 sampleid = timestamp=1615911663
Tue Mar 16 11:21:17 2022   AMPPyrex:-  AMP-DEBUG: AMP Extraction monitoring thread entering into sleep. Thread pool length=19 free pool size=1

Überprüfung von GUI für erfolgreichen Prozess

Navigieren Sie zu Nachrichtenverfolgung, und filtern Sie die Nachrichten-ID.

Überprüfung von CLI für fehlgeschlagenen Prozess

Bedingung: Falsches Kennwort oder Kennwort nicht gefunden.

a) Von mail_logs in CLI 

Wed Feb 24 12:24:40 2022 Info: MID 22178297 ICID 122563 From: 
     
     
       Wed Feb 24 12:24:40 2022 Info: MID 22178297 ICID 122563 RID 0 To: 
      
        Wed Feb 24 12:24:40 2022 Info: MID 22178297 using engine: SPF Verdict Cache using cached verdict Wed Feb 24 12:24:40 2022 Info: SPF Verdict Cache cache status: hits = 10, misses = 531, expires = 318, adds = 531, seconds saved = 0.04, total seconds = 9.69 Wed Feb 24 12:24:40 2022 Info: MID 22178297 SPF: helo identity postmaster@[10.0.201.16] None Wed Feb 24 12:24:40 2022 Info: MID 22178297 using engine: SPF Verdict Cache using cached verdict Wed Feb 24 12:24:40 2022 Info: MID 22178297 SPF: mailfrom identity test@lab.cisco.com Pass (v=spf1) Wed Feb 24 12:24:40 2022 Info: MID 22178297 using engine: SPF Verdict Cache using cached verdict Wed Feb 24 12:24:40 2022 Info: MID 22178297 SPF: pra identity test@lab.cisco.com None headers from Wed Feb 24 12:24:40 2022 Info: MID 22178297 DMARC: Message from domain lab.cisco.com, DMARC pass (SPF aligned True, DKIM aligned False) Wed Feb 24 12:24:40 2022 Info: MID 22178297 DMARC: Verification passed Wed Feb 24 12:24:40 2022 Info: MID 22178297 Message-ID '<825ab100-3066-e35e-148e-9ea08cb2fb28@lab.cisco.com>' Wed Feb 24 12:24:40 2022 Info: MID 22178297 Subject ppfa test without password Wed Feb 24 12:24:40 2022 Info: MID 22178297 SDR: Domains for which SDR is requested: reverse DNS host: Not Present, helo: [10.0.201.16], env-from: lab.cisco.com, header-from: lab.cisco.com, reply-to: Not Present Wed Feb 24 12:24:40 2022 Info: MID 22178297 SDR: Consolidated Sender Reputation: Tainted, Threat Category: N/A, Suspected Domain(s) : test@lab.cisco.com. Youngest Domain Age: 4 months 14 days for domain: test@lab.cisco.com Wed Feb 24 12:24:40 2022 Info: MID 22178297 SDR: Tracker Header : jiOYjEFgtyhTbL9t0GE5obyJYv3d6lj/sYLgchp5eutSz6X67FGFv3IHCBbU5wQBlYXe8Bv/r+uhxP6VIAXvyXSt35AAGc5hkANFBHB0v/PJzmLg4sd2yacAozybm9ITPJKTdj+4cQtIrgZxBJtCuBoBQ9Y4v00rdaaYT15VZ3CLjypIvVIZeImiTGR1OwocHluoZrdecXFIT3Lo9lTBsJVPbIkyI3AU0Z82nQPgkCsp8CVAQYYlQXqd7ObrcFIsfX6NHZ+Z22kXaRlBd7FMk4PJ6u8X3R9B1vP+bJoM5Cxx15ZHNkgD49u8PJT2ags4 Wed Feb 24 12:24:40 2022 Info: MID 22178297 ready 22089 bytes from 
       
         Wed Feb 24 12:24:40 2022 Info: LDAP: Masquerade query LDAP.masquerade MID 22178297 address test@lab.cisco.com to test@lab.cisco.com Wed Feb 24 12:24:40 2022 Info: ICID 122563 close Wed Feb 24 12:24:40 2022 Info: LDAP: Masquerade query LDAP.masquerade MID 22178297 address test@lab.cisco.com to test@lab.cisco.com Wed Feb 24 12:24:40 2022 Info: MID 22178297 attachment 'testfile.xlsx' Wed Feb 24 12:24:42 2022 Info: MID 22178297 was marked unscannable due to extraction failures. Reason: The password protected attachment 'testfile.xlsx' could not be scanned successfully. Wed Feb 24 12:24:42 2022 Warning: MID 22178297: scanning error (name='testfile.xlsx', type=document/xls): Extraction failure of password protected attachment Wed Feb 24 12:24:42 2022 Info: MID 22178297 matched all recipients for per-recipient policy test1 in the inbound table Wed Feb 24 12:24:46 2022 Info: MID 22178297 interim verdict using engine: CASE spam negative Wed Feb 24 12:24:46 2022 Info: MID 22178297 using engine: CASE spam negative Wed Feb 24 12:24:46 2022 Info: MID 22178297 interim AV verdict using McAfee ENCRYPTED Wed Feb 24 12:24:46 2022 Info: MID 22178297 interim AV verdict using Sophos ENCRYPTED Wed Feb 24 12:24:46 2022 Info: MID 22178297 antivirus encrypted Wed Feb 24 12:24:46 2022 Info: MID 22178297 AMP file reputation verdict : UNKNOWN Wed Feb 24 12:24:46 2022 Info: MID 22178297 using engine: GRAYMAIL negative Wed Feb 24 12:24:46 2022 Info: MID 22178297 Unable to safe print the attachment, Filename: testfile.xlsx, Reason: The attachment is encrypted, Action: The attachment is stripped Wed Feb 24 12:24:46 2022 Info: MID 22178297 rewritten to MID 22178298 by safeprint-all-attachments-strip-unscan filter 'PDF-Safeprint' Wed Feb 24 12:24:46 2022 Info: Message finished MID 22178297 done 
        
       
     

b) In content_scanner sehen Sie: 

Wed Feb 24 12:24:42 2022 Info: PF: MID 22178297 Failed to open document - 'testfile.xlsx' because it is password protected.

GUI-Überprüfung für fehlgeschlagenen Prozess

a) Filtern Sie über die GUI in Message Tracking (Nachrichtenverfolgung) nach Message ID.

Geschachtelte kennwortgeschützte Dateien

Geschachtelte kennwortgeschützte Dateien können nicht extrahiert werden. Dies wird derzeit nicht unterstützt.

Sie können diesen Fehler in mail_logs sehen

Sun Nov 22 21:09:31 2022 Info: MID 19597596 attachment 'testfile.zip'
Sun Nov 22 21:09:31 2022 Info: ICID 465893 close
Sun Nov 22 21:09:41 2022 Info: MID 19597596 was marked unscannable due to extraction failures. Reason: The attachment could not be decrypted for scanning.

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Verwenden Sie den Befehl "ppfastats" in der CLI, um die Zusammenfassung der Nachrichten anzuzeigen, die kennwortgeschützte Anhänge enthielten und von der ESA gescannt wurden.

(Machine esa1.lab.cisco.com)> ppfastats

Incoming PPFA Statistics:
Total number of Password Protected Attachments : 425
Total number of Sucessfully scanned Password Protected Attachments : 386
Total number of Protected PDF Attachments : 136
Total number of Sucessfully scanned PDF Attachments : 136
Total number of Protected Office Attachments (XLS, PPT, DOC) : 36
Total number of Sucessfully scanned Office Attachments : 36
Total number of Protected Archive Attachments : 253
Total number of Sucessfully scanned Archive Attachments (ZIP) : 214

Outgoing PPFA Statistics:
PPFA Statistics data not available for Outgoing Mails.

Zugehörige Informationen

• Bedienungsanleitung für AsyncOS 14.3 für Cisco Secure Email Cloud Gateway - Cisco