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https://github.com/microsoft/krabsetw
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John U
9863c2cb8a
* [poc] inject schema_locator * Apply suggestions from code review Co-Authored-By: Kyle Reed <kareed@kallanreed.com> * inject schema_locator [C++/CLI] * inject schema_locator into predicate * Update krabs/krabs/schema.hpp Co-Authored-By: Kyle Reed <kareed@kallanreed.com> * updated docs * updated nuspec Co-authored-by: Kyle Reed <kareed@kallanreed.com>
59 lines
2.6 KiB
C++
59 lines
2.6 KiB
C++
// Copyright (c) Microsoft. All rights reserved.
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// Licensed under the MIT license. See LICENSE file in the project root for full license information.
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// Krabs supports provider filtering based on ETW API filtering features.
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// This example listening for file delete event together with predicate which we post
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// process event id filter with other filtering
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//
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#include <iostream>
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#include <cassert>
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#include "..\..\krabs\krabs.hpp"
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#include "examples.h"
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void user_trace_004::start()
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{
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// user_trace instances should be used for any non-kernel traces that are defined
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// by components or programs in Windows. They can optionally take a name -- if none
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// is provided, a random GUID is assigned as the name.
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krabs::user_trace trace(L"My Named Trace");
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// A trace can have any number of providers, which are identified by GUID. These
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// GUIDs are defined by the components that emit events, and their GUIDs can
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// usually be found with various ETW tools (like wevutil).
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//listen for file events
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krabs::provider<> provider(krabs::guid(L"{EDD08927-9CC4-4E65-B970-C2560FB5C289}"));
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// In user_trace_001.cpp we manually filter events by checking the event information
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// In user_trace_002.cpp we filter events using provider predicates
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// In user_trace_003_no_predicates.cpp we filter with ETW filtering only without predicate
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// In this example (user_trace_004), we're going to use both provider filter based on ETW filtering features
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// and predicate which does additional filtering
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// We instantiate an event_filter first. An event_filter is created with a
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// event id which will be forwarded as filter to etw tracing api
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// predicate filtering is taking in consideration only system process
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krabs::event_filter filter(11, krabs::predicates::process_id_is(4));
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auto cb = [](const EVENT_RECORD &record, const krabs::trace_context &trace_context) {
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krabs::schema schema(record, trace_context.schema_locator);
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assert(schema.event_id() == 11);
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assert(schema.process_id() == 4);
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std::wcout << L"Event " +
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std::to_wstring(schema.event_id()) +
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L" received for pid " +
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std::to_wstring(schema.process_id()) << std::endl;
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};
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filter.add_on_event_callback(cb);
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// event_filters are attached to providers. Events that are attached to a filter will
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// only be called when the filter allows the event through. Any events attached to the
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// provider directly will be called for all events that are fired by the ETW producer.
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provider.add_filter(filter);
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trace.enable(provider);
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trace.start();
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}
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