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@ -33,7 +33,7 @@ Before creating custom threat intelligence, it's important to know the concepts
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Alert definitions are contextual attributes that can be used collectively to identify early clues on a possible cybersecurity attack. These indicators are typically a combination of activities, characteristics, and actions taken by an attacker to successfully achieve the objective of an attack. Monitoring these combinations of attributes is critical in gaining a vantage point against attacks and possibly interfering with the chain of events before an attacker's objective is reached.
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## Indicators of compromise (IOC)
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IOCs are individual known malicious events that indicate that a network or machine has already been breached. Unlike alert definitions, these indicators are considered as evidence of a breach. They are often seen after an attack has already been carried out and the objective has been reached, such as exfiltration. Keeping track of IOCs is also important during forensic investigations. Although it might not provide the ability to intervene an attack chain, gathering these indicators can be useful in creating better defenses for possible future attacks.
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IOCs are individually-known malicious events that indicate that a network or machine has already been breached. Unlike alert definitions, these indicators are considered as evidence of a breach. They are often seen after an attack has already been carried out and the objective has been reached, such as exfiltration. Keeping track of IOCs is also important during forensic investigations. Although it might not provide the ability to intervene with an attack chain, gathering these indicators can be useful in creating better defenses for possible future attacks.
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## Relationship between alert definitions and IOCs
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In the context of Windows Defender ATP, alert definitions are containers for IOCs and defines the alert, including the metadata that is raised in case of a specific IOC match. Various metadata is provided as part of the alert definitions. Metadata such as alert definition name of attack, severity, and description is provided along with other options. For more information on available metadata options, see [Custom TI API metadata](custom-ti-api-windows-defender-advanced-threat-protection.md#custom-ti-api-metadata).
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@ -41,7 +41,7 @@ In the context of Windows Defender ATP, alert definitions are containers for IOC
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Each IOC defines the concrete detection logic based on its type and value as well as its action, which determines how it is matched. It is bound to a specific alert definition that defines how a detection is displayed as an alert on the Windows Defender ATP console.
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Here is an example of an IOC:
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- Type: Sha1
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- Type: SHA-1
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- Value: 92cfceb39d57d914ed8b14d0e37643de0797ae56
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- Action: Equals
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