Collect Microsoft IIS logs

Supported in:

Google secops SIEM

Note: This feature is covered by Pre-GA Offerings Terms of the Google Security Operations Service Specific Terms. Pre-GA features might have limited support, and changes to pre-GA features might not be compatible with other pre-GA versions. For more information, see the Google SecOps Technical Support Service guidelines and the Google SecOps Service Specific Terms.

This document explains how to ingest Microsoft Internet Information Services (IIS) logs to Google Security Operations using Bindplane.

Before you begin

Make sure you have the following prerequisites:

• A Google SecOps instance
• A Windows Server 2016 or later with IIS installed
• Administrative access to the IIS server
• If running behind a proxy, ensure firewall ports are open per the Bindplane agent requirements

Get Google SecOps ingestion authentication file

1. Sign in to the Google SecOps console.
2. Go to SIEM Settings > Collection Agents.
3. Download the Ingestion Authentication File. Save the file securely on the system where Bindplane will be installed (for example, C:\SecOps\ingestion-auth.json).

Get Google SecOps customer ID

1. Sign in to the Google SecOps console.
2. Go to SIEM Settings > Profile.
3. Copy and save the Customer ID from the Organization Details section.

Configure IIS W3C Extended Logging

You must enable the correct W3C fields in IIS Manager so Google SecOps can parse your logs properly and detections work reliably.

Open IIS Manager

1. Click Start.
2. Type inetmgr and press Enter.
3. The Internet Information Services (IIS) Manager window opens.

Alternative method:

1. Press Windows Key + R.
2. Type inetmgr and press Enter.

Navigate to Logging Configuration

1. In the Connections pane (left side), expand your server name.
2. To configure server-wide logging (recommended):
   • Click the server name at the root level.
3. To configure site-specific logging:
   • Expand Sites and then click the specific site (for example, Default Web Site).
4. In the Features View (center pane), double-click Logging.

Select W3C Extended Log Format

1. On the Logging page, under Log File section:
   • In the Format drop-down, select W3C.
2. Click Select Fields button.

Configure W3C Logging Fields

IMPORTANT: The Google SecOps IIS parser supports 8 field configurations. You must enable ALL fields from ONE of the following patterns. Enabling different fields or mixing patterns will cause parsing failures.

In the W3C Logging Fields dialog, select fields according to ONE of the following patterns:

Pattern 1: Full Site Context with Query String and Bytes

Enable these fields in this exact order:

• Date (date)
• Time (time)
• Service Name (s-sitename)
• Server IP Address (s-ip)
• Method (cs-method)
• URI Stem (cs-uri-stem)
• URI Query (cs-uri-query)
• Server Port (s-port)
• User Name (cs-username)
• Client IP Address (c-ip)
• User Agent (cs(User-Agent))
• Referer (cs(Referer))
• Protocol Status (sc-status)
• Bytes Sent (sc-bytes)
• Bytes Received (cs-bytes)

Use this pattern when: Your downstream format includes site context + query string and you require sent/received bytes, and your pipeline expects the "username" and "referer" columns (even if values are -).

Pattern 2: Basic with Substatus, Win32 Status, and Performance (No Referer)

Enable these fields in this exact order:

• Date (date)
• Time (time)
• Server IP Address (s-ip)
• Method (cs-method)
• URI Stem (cs-uri-stem)
• URI Query (cs-uri-query)
• Server Port (s-port)
• User Name (cs-username)
• Client IP Address (c-ip)
• User Agent (cs(User-Agent))
• Protocol Status (sc-status)
• Protocol Substatus (sc-substatus)
• Win32 Status (sc-win32-status)
• Time Taken (time-taken)

Use this pattern when: Your pipeline does not include Referer, but you need detailed error codes and latency (time-taken).

Pattern 3: Basic with Substatus, Win32 Status, and Performance (With Referer)

Enable these fields in this exact order:

• Date (date)
• Time (time)
• Server IP Address (s-ip)
• Method (cs-method)
• URI Stem (cs-uri-stem)
• URI Query (cs-uri-query)
• Server Port (s-port)
• User Name (cs-username)
• Client IP Address (c-ip)
• User Agent (cs(User-Agent))
• Referer (cs(Referer))
• Protocol Status (sc-status)
• Protocol Substatus (sc-substatus)
• Win32 Status (sc-win32-status)
• Time Taken (time-taken)

Use this pattern when: Same as Pattern 2, but your pipeline includes Referer as a dedicated column.

Pattern 4: TLS/Protocol-Version Aware with Referrer and Performance

Enable these fields in this exact order:

• Date (date)
• Time (time)
• Server IP Address (s-ip)
• Method (cs-method)
• URI Stem (cs-uri-stem)
• URI Query (cs-uri-query)
• Client Port (c-port)
• User Name (cs-username)
• Client IP Address (c-ip)
• Protocol Version (cs-version)
• User Agent (cs(User-Agent))
• Referer (cs(Referer))
• Protocol Status (sc-status)
• Protocol Substatus (sc-substatus)
• Win32 Status (sc-win32-status)
• Time Taken (time-taken)

Use this pattern when: Your downstream format explicitly logs cs-version (e.g., HTTP/1.1) and includes timing, and you also have client port as a dedicated column.

Pattern 5: TLS/Protocol-Version Aware with Referrer (No Performance)

Enable these fields in this exact order:

• Date (date)
• Time (time)
• Server IP Address (s-ip)
• Method (cs-method)
• URI Stem (cs-uri-stem)
• URI Query (cs-uri-query)
• Client Port (c-port)
• User Name (cs-username)
• Client IP Address (c-ip)
• Protocol Version (cs-version)
• User Agent (cs(User-Agent))
• Referer (cs(Referer))
• Protocol Status (sc-status)
• Protocol Substatus (sc-substatus)
• Win32 Status (sc-win32-status)

Use this pattern when: Same as Pattern 4, but your pipeline does not include time-taken.

Pattern 6: With Cookie and Referer (No Performance, No Bytes)

Enable these fields in this exact order:

• Date (date)
• Time (time)
• Server IP Address (s-ip)
• Method (cs-method)
• URI Stem (cs-uri-stem)
• URI Query (cs-uri-query)
• Client Port (c-port)
• User Name (cs-username)
• Client IP Address (c-ip)
• User Agent (cs(User-Agent))
• Cookie (cs(Cookie))
• Referer (cs(Referer))
• Protocol Status (sc-status)
• Protocol Substatus (sc-substatus)
• Win32 Status (sc-win32-status)

Use this pattern when: Your downstream format expects both Cookie and Referer as dedicated columns.

Pattern 7: Minimal with Referer (No Cookie, No Performance, No Bytes)

Enable these fields in this exact order:

• Date (date)
• Time (time)
• Server IP Address (s-ip)
• Method (cs-method)
• URI Stem (cs-uri-stem)
• URI Query (cs-uri-query)
• Client Port (c-port)
• User Name (cs-username)
• Client IP Address (c-ip)
• User Agent (cs(User-Agent))
• Referer (cs(Referer))
• Protocol Status (sc-status)
• Protocol Substatus (sc-substatus)
• Win32 Status (sc-win32-status)

Use this pattern when: Your downstream format includes Referer but does not include Cookie/time/bytes.

Pattern 8: Minimal without Referer (No Cookie, No Performance, No Bytes)

Enable these fields in this exact order:

• Date (date)
• Time (time)
• Server IP Address (s-ip)
• Method (cs-method)
• URI Stem (cs-uri-stem)
• URI Query (cs-uri-query)
• Client Port (c-port)
• User Name (cs-username)
• Client IP Address (c-ip)
• User Agent (cs(User-Agent))
• Protocol Status (sc-status)
• Protocol Substatus (sc-substatus)
• Win32 Status (sc-win32-status)

Use this pattern when: Your downstream format does not include Referer and you only need core request context plus status codes.

Do NOT enable fields from multiple patterns. The parser expects one of these exact configurations.

Apply Configuration

1. Click OK to close the W3C Logging Fields dialog.
2. Verify the Directory path where logs will be written.
   • Default: %SystemDrive%\inetpub\logs\LogFiles
3. Under Log File Rollover, select Daily (recommended for Google SecOps ingestion).
4. Click Apply in the Actions pane (right side).

Verify IIS Logging

After configuring the W3C fields, verify that IIS is writing logs correctly:

1. Generate test traffic to your IIS site by opening a web page in a browser.
2. Navigate to the log directory: C:\inetpub\logs\LogFiles\W3SVC1\
   • Note: W3SVC1 corresponds to the first site (Default Web Site). For other sites, the folder name will be W3SVC2, W3SVC3, etc.
3. Open the most recent log file (for example, u_ex251217.log) in Notepad.
4. Verify the #Fields: line contains all the fields you enabled in the exact order from your chosen pattern.

Example for Pattern 3

If you configured Pattern 3 (Basic with Substatus, Win32 Status, and Performance with Referer), the #Fields: line should be:

#Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) cs(Referer) sc-status sc-substatus sc-win32-status time-taken

Example log entry:

2025-12-17 14:23:15 192.168.1.10 GET /index.html - 80 - 203.0.113.45 Mozilla/5.0+(Windows+NT+10.0) https://example.com/previous.html 200 0 0 125

Important notes:

• Empty fields are represented by a hyphen (-)
• Field order must match the #Fields: header exactly
• The parser will fail if fields are missing, reordered, or from multiple patterns

Install the Bindplane agent

Install the Bindplane agent on your Windows server according to the following instructions.

Windows Installation

1. Open Command Prompt or PowerShell as an administrator.

2. Run the following command:

   msiexec /i "https://github.com/observIQ/bindplane-agent/releases/latest/download/observiq-otel-collector.msi" /quiet
   

Additional Installation Resources

• For additional installation options, consult this installation guide.

Configure the Bindplane agent to ingest IIS logs and send them to Google SecOps

Edit the Configuration File

1. Locate the config.yaml file.
   • Default path: C:\Program Files\observIQ OpenTelemetry Collector\config.yaml
2. Open the file using a text editor (for example, Notepad, VS Code, or Notepad++) as Administrator.

3. Replace the entire contents with the following configuration:

   receivers:
     iis:
       collection_interval: 60s
   
   processors:
     resourcedetection:
       detectors: ["system"]
       system:
         hostname_sources: ["os"]
     normalizesums:
     batch:
   
   exporters:
     chronicle/iis:
       endpoint: malachiteingestion-pa.googleapis.com
       creds: 'C:\SecOps\ingestion-auth.json'
       log_type: 'IIS'
       override_log_type: false
       raw_log_field: body
       customer_id: '<CUSTOMER_ID>'
       compression: gzip
   
   service:
     pipelines:
       logs/iis:
         receivers:
           - iis
         processors:
           - resourcedetection
           - normalizesums
           - batch
         exporters:
           - chronicle/iis
   

Update Configuration Values

Replace the following placeholders:

• creds: - Path to your ingestion authentication file (for example, C:\SecOps\ingestion-auth.json).
• endpoint: - your regional endpoint.
• customer_id: - Your actual Google SecOps customer ID from the Get Google SecOps customer ID section.

Note: For the complete list of regional endpoints, see Regional Endpoints documentation.

Restart the Bindplane agent to apply the changes

To restart the Bindplane agent in Windows, you can either use the Services console or enter the following command:

net stop observiq-otel-collector && net start observiq-otel-collector

UDM Mapping Table

Log field	UDM mapping	Logic
@timestamp	metadata.event_timestamp	The timestamp of the event as recorded in the raw log.
@version	metadata.product_version	The version of the IIS server.
AgentDevice	additional.fields.AgentDevice.value.string_value	The device that generated the log.
AgentLogFile	additional.fields.AgentLogFile.value.string_value	The name of the log file.
ASP.NET_SessionId	network.session_id	The session ID of the user.
c-ip	principal.ip	The IP address of the client.
Channel	security_result.about.resource.attribute.labels.Channel.value	The channel where the event was logged.
ChannelID	security_result.about.resource.attribute.labels.ChannelID.value	The ID of the channel where the event was logged.
Computer	target.hostname	The hostname of the target machine.
cs-bytes	network.received_bytes	The number of bytes received from the client.
cs-host	principal.hostname, principal.asset.hostname	The hostname of the client.
cs-method	network.http.method	The HTTP method used by the client.
cs-uri-query	target.url	The query string of the URL requested by the client.
cs-uri-stem	target.url	The path of the URL requested by the client.
cs-username	principal.user.user_display_name	The username of the client.
cs-version	network.tls.version_protocol	The HTTP version used by the client.
cs(Cookie)		Used to extract cookie information.
cs(Referer)	network.http.referral_url	The URL that referred the client to the current page.
cs(User-Agent)	network.http.user_agent	The user agent of the client.
csbyte	network.received_bytes	The number of bytes received from the client.
cshost	principal.hostname, principal.asset.hostname	The hostname of the client.
csip	principal.ip, principal.asset.ip	The IP address of the client.
csmethod	network.http.method	The HTTP method used by the client.
csreferer	network.http.referral_url	The URL that referred the client to the current page.
csuseragent	network.http.user_agent	The user agent of the client.
csusername	principal.user.user_display_name	The username of the client.
csversion	network.tls.version_protocol	The HTTP version used by the client.
date		Used to construct the event timestamp if the raw log timestamp is invalid.
description	security_result.description	A description of the event.
devicename	target.hostname	The hostname of the target machine.
dst_ip	target.ip, target.asset.ip	The IP address of the target machine.
dst_port	target.port	The port number of the target machine.
duration		The duration of the request in milliseconds.
EventEnqueuedUtcTime	additional.fields.EventEnqueuedUtcTime.value.string_value	The time when the event was enqueued in UTC.
EventID	metadata.product_log_id	The ID of the event.
EventProcessedUtcTime	additional.fields.EventProcessedUtcTime.value.string_value	The time when the event was processed in UTC.
EventTime	metadata.event_timestamp	The timestamp of the event.
EventType	metadata.product_event_type	The type of the event.
file_path	target.file.full_path	The full path of the file involved in the event.
FilterId	security_result.about.resource.attribute.labels.FilterId.value	The ID of the filter.
FilterKey	security_result.about.resource.attribute.labels.FilterKey.value	The key of the filter.
FilterName	security_result.about.resource.attribute.labels.FilterName.value	The name of the filter.
FilterType	security_result.about.resource.attribute.labels.FilterType.value	The type of the filter.
host	target.hostname	The hostname of the target machine.
host.architecture	principal.asset.hardware.cpu_platform	The architecture of the host machine.
host.geo.name	additional.fields.geo_name.value.string_value	The geographical location of the host machine.
host.hostname	target.hostname, target.asset.hostname	The hostname of the host machine.
host.id	observer.asset_id	The ID of the host machine.
host.ip	principal.ip, principal.asset.ip	The IP address of the host machine.
host.mac	principal.mac	The MAC address of the host machine.
host.os.build	additional.fields.os_build.value.string_value	The build number of the operating system on the host machine.
host.os.kernel	principal.platform_patch_level	The kernel version of the operating system on the host machine.
host.os.name	additional.fields.os_name.value.string_value	The name of the operating system on the host machine.
host.os.platform	principal.platform	The platform of the operating system on the host machine.
host.os.version	principal.platform_version	The version of the operating system on the host machine.
http_method	network.http.method	The HTTP method used by the client.
http_response	network.http.response_code	The HTTP response code.
http_status_code	network.http.response_code	The HTTP status code of the response.
http_substatus	additional.fields.sc_substatus.value.string_value	The HTTP substatus code of the response.
instance	additional.fields.instance.value.string_value	The instance ID of the task.
intermediary_devicename	intermediary.hostname, intermediary.asset.hostname	The hostname of the intermediary device.
json_message		The raw log message in JSON format.
kv_fields		Used to extract key-value pairs from the raw log message.
LayerKey	security_result.about.resource.attribute.labels.LayerKey.value	The key of the layer.
LayerName	security_result.about.resource.attribute.labels.LayerName.value	The name of the layer.
LayerId	security_result.about.resource.attribute.labels.LayerId.value	The ID of the layer.
log.file.path	target.file.full_path	The full path of the log file.
log.offset	metadata.product_log_id	The offset of the event in the log file.
logstash.collect.host	observer.hostname	The hostname of the machine that collected the log.
logstash.process.host	intermediary.hostname	The hostname of the machine that processed the log.
logstash_json_message		The raw log message in JSON format.
message	security_result.description	The raw log message.
ministry	additional.fields.ministry.value.string_value	The ministry associated with the event.
name		The name of the entity.
NewValue	additional.fields.NewValue.value.string_value	The new value of the configuration setting.
OldValue	additional.fields.OldValue.value.string_value	The old value of the configuration setting.
port	principal.port	The port number of the client.
priority_code		The priority code of the syslog message.
ProcessID	principal.process.pid	The process ID of the process that generated the event.
ProviderGuid	security_result.about.resource.attribute.labels.ProviderGuid.value	The GUID of the provider.
ProviderKey	security_result.about.resource.attribute.labels.ProviderKey.value	The key of the provider.
ProviderName	security_result.about.resource.attribute.labels.ProviderName.value	The name of the provider.
referrer_url	network.http.referral_url	The URL that referred the client to the current page.
request_url	target.url	The URL requested by the client.
s-computername	target.hostname	The hostname of the target machine.
s-ip	target.ip, target.asset.ip	The IP address of the target machine.
s-port	target.port	The port number of the target machine.
s-sitename	additional.fields.sitename.value.string_value	The name of the site.
sc-bytes	network.sent_bytes	The number of bytes sent to the client.
sc-status	network.http.response_code	The HTTP status code of the response.
sc-substatus	additional.fields.sc_substatus.value.string_value	The HTTP substatus code of the response.
sc-win32-status		The Windows status code of the response.
scbyte	network.sent_bytes	The number of bytes sent to the client.
scstatus	network.http.response_code	The HTTP status code of the response.
severity	security_result.severity	The severity of the event.
service.type	additional.fields.service_type.value.string_value	The type of the service.
sIP	principal.ip, principal.asset.ip	The IP address of the client.
sPort	principal.port	The port number of the client.
sSiteName	additional.fields.sitename.value.string_value	The name of the site.
src_ip	principal.ip, principal.asset.ip, observer.ip	The IP address of the client.
src_port	principal.port	The port number of the client.
sysdate		The date and time of the syslog message.
syslog_facility	security_result.severity_details	The facility of the syslog message.
syslog_pri		The priority of the syslog message.
syslog_severity	security_result.severity_details	The severity of the syslog message.
syslog_severity_code		The severity code of the syslog message.
tags	security_result.rule_name	Tags associated with the event.
task	additional.fields.task.value.string_value	The name of the task.
time		Used to construct the event timestamp if the raw log timestamp is invalid.
time-taken		The duration of the request in milliseconds.
uri_query	target.url	The query string of the URL requested by the client.
user_agent	network.http.user_agent	The user agent of the client.
UserName	target.user.userid	The username of the user.
UserSid	target.user.windows_sid	The Windows SID of the user.
Weight	security_result.about.resource.attribute.labels.Weight.value	The weight of the filter.
win32_status		The Windows status code of the response.
xforwardedfor		The X-Forwarded-For header, containing a comma-separated list of IP addresses.
	metadata.log_type	"IIS"
	network.direction	"INBOUND"
	metadata.vendor_name	"Microsoft"
	metadata.product_name	"Internet Information Server"
	metadata.event_type	"NETWORK_HTTP", "USER_UNCATEGORIZED", "GENERIC_EVENT", "STATUS_UPDATE", "USER_LOGOUT", "USER_LOGIN"
	extensions.auth.type	"MACHINE"

Need more help? Get answers from Community members and Google SecOps professionals.