Introducir análisis de archivos protegidos por contraseña (PPFA)

Introducción

Este documento describe el nuevo Análisis de archivos protegidos por contraseña (PPFA) agregado a la versión 14.X del dispositivo de seguridad de correo electrónico (ESA).

Prerequisites

Requirements

Cisco recomienda que conozca los conceptos y la configuración de ESA.

Componentes Utilizados

La información de este documento se basa en AsyncOS para ESA 14.0 y versiones posteriores.

La información que contiene este documento se creó a partir de los dispositivos en un ambiente de laboratorio específico. Todos los dispositivos que se utilizan en este documento se pusieron en funcionamiento con una configuración verificada (predeterminada). Si tiene una red en vivo, asegúrese de entender el posible impacto de cualquier comando.

Antecedentes

Anteriormente, no se podía analizar el contenido de un documento protegido por contraseña o de un archivo adjunto como PDF, Doc, ZIP, etc. porque la contraseña era desconocida.

Con la introducción de PPFA, los correos electrónicos que contienen archivos adjuntos protegidos con contraseña pueden analizarse para detectar actividad maliciosa y privacidad de datos si la contraseña está presente en el cuerpo del correo.

Formatos e idioma admitidos

Esta es la lista de formatos admitidos:

• PDF
• Archivo de MS Office

doc/x 2007-2019 / doc 2002 a 2004

xls/x 2007-2019

ppt/x 2007-2019

• Archivo

zip, rar, 7z

Aquí puede encontrar la lista de idiomas admitidos: 

   

Consideraciones

PPFA está desactivado de forma predeterminada.

Los archivos adjuntos protegidos por contraseña sólo se pueden analizar actualmente si la contraseña está presente en el cuerpo del correo. Las contraseñas distinguen entre mayúsculas y minúsculas y no reconocen el "espacio". 

Ahora se admite una lista de hasta 5 contraseñas proporcionadas por el administrador.

Configuration Steps

Interfaz Gráfica de Usuario (GUI)

Para configurar PPFA desde la GUI, navegue hasta Servicio de seguridad > Comportamiento de escaneo > Editar configuración global > Escaneo de archivos adjuntos protegidos por contraseña > elija Habilitar para el tráfico de correo entrante/tráfico de correo saliente o Ambos >Enviar >Confirmar

Interfaz de Línea de Comandos (CLI)

Para configurar PPFA desde CLI, ejecute el comando scanconfig > PROTECTEDATTACHMENTCONFIG > Commit

(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.

Para aumentar el número máximo de contraseñas extraídas de un cuerpo de correo electrónico, el comando oculto "scanconfig > password_list_size" se puede utilizar en CLI. Puede configurar un máximo de 10 contraseñas.

(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.

Solución de problemas y verificación

En este ejemplo, el filtro de contenido con condiciones:

1. el contenido del adjunto contiene "prueba" y
2. si el archivo adjunto está protegido por contraseña

entonces la acción es registrar "!!!!!file is passwordprotected!!!!!!"

Verificación desde CLI para un proceso exitoso

a) En CLI de mail_logs, puede ver:

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) De los registros de content_scanner puede ver si el archivo se ha extraído correctamente 

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

c) De amp_logs, Puede ver que el archivo extraído se envía ahora a Protección avanzada frente a malware (AMP) y Análisis de archivos para su análisis.

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) Si amp_logs se encuentran en el nivel Debug, puede ver más información relacionada con el archivo protegido por contraseña:

 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

Verificación desde la GUI para un proceso exitoso

Navegue hasta Rastreo de mensajes y filtre el ID del mensaje.

Verificación desde CLI para proceso fallido

Condición: contraseña incorrecta o no encontrada.

a) De mail_logs en 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) En content_scanner puede ver: 

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

Verificación desde GUI para proceso fallido

a) En GUI en Rastreo de mensajes, filtre por ID de mensaje

Archivos anidados protegidos por contraseña

No se pueden extraer los archivos anidados protegidos por contraseña. Actualmente no se admite.

Puede ver este error en mail_logs

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.

Ver estado

Utilice el comando "ppfastats" en CLI para ver el resumen de los mensajes que tenían adjuntos protegidos por contraseña y que fueron analizados por ESA.

(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.

Información Relacionada

• Guía del usuario de AsyncOS 14.3 para Cisco Secure Email Cloud Gateway - Cisco