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Communications over P2P network

yara LOW Yara-Rules
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This rule was pulled from an open-source repository and enriched with AI. Validate in a test environment before deploying to production.
View original rule at Yara-Rules →
Retrieved: 2026-04-20T09:00:00Z · Confidence: medium

Hunt Hypothesis

Adversaries may use peer-to-peer networks to exfiltrate data or establish command and control channels without relying on traditional infrastructure. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify potential covert communication channels and mitigate advanced persistent threat activities.

YARA Rule

rule network_p2p_win {
    meta:
        author = "x0r"
        description = "Communications over P2P network"
	version = "0.1"
    strings:
     	$c1 = "PeerCollabExportContact"
     	$c2 = "PeerCollabGetApplicationRegistrationInfo"
     	$c3 = "PeerCollabGetEndpointName"
     	$c4 = "PeerCollabGetEventData"
     	$c5 = "PeerCollabGetInvitationResponse"
     	$c6 = "PeerCollabGetPresenceInfo"
     	$c7 = "PeerCollabGetSigninOptions"
     	$c8 = "PeerCollabInviteContact"
     	$c9 = "PeerCollabInviteEndpoint"
     	$c10 = "PeerCollabParseContact"
     	$c11 = "PeerCollabQueryContactData"
     	$c12 = "PeerCollabRefreshEndpointData"
     	$c13 = "PeerCollabRegisterApplication"
     	$c14 = "PeerCollabRegisterEvent"
     	$c15 = "PeerCollabSetEndpointName"
     	$c16 = "PeerCollabSetObject"
     	$c17 = "PeerCollabSetPresenceInfo"
     	$c18 = "PeerCollabSignout"
     	$c19 = "PeerCollabUnregisterApplication"
     	$c20 = "PeerCollabUpdateContact"
    condition:
        5 of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 20 string patterns in its detection logic.

False Positive Guidance

Original source: https://github.com/Yara-Rules/rules/blob/main/capabilities/capabilities.yar