T1591.002_business-relationships

Research

Adversaries may gather information about the victim's business relationships that can be used during targeting.

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/mitre_attack/TA0043_reconnaissance/T1591.002_business-relationships/SKILL.md

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T1591.002 Business Relationships

Sub-technique of: T1591

High-Level Description

Adversaries may gather information about the victim's business relationships that can be used during targeting. Information about an organization’s business relationships may include a variety of details, including second or third-party organizations/domains (ex: managed service providers, contractors, etc.) that have connected (and potentially elevated) network access. This information may also reveal supply chains and shipment paths for the victim’s hardware and software resources.

Adversaries may gather this information in various ways, such as direct elicitation via Phishing for Information. Information about business relationships may also be exposed to adversaries via online or other accessible data sets (ex: Social Media or Search Victim-Owned Websites). Gathering this information may reveal opportunities for other forms of reconnaissance (ex: Phishing for Information or Search Open Websites/Domains), establishing operational resources (ex: Establish Accounts or Compromise Accounts), and/or initial access (ex: Supply Chain Compromise, Drive-by Compromise, or Trusted Relationship).

Kill Chain Phase

Reconnaissance (TA0043)

Platforms: PRE

What to Check

Identify if Business Relationships technique is applicable to target environment
Check PRE systems for indicators of Business Relationships
Verify mitigations are bypassed or absent (1 known mitigations)
Assess detection coverage (1 detection strategies)

How to Test

Manual Testing

Identify Attack Surface: Determine if the target environment is susceptible to Business Relationships by examining the target platforms (PRE).
Assess Existing Defenses: Review whether mitigations for T1591.002 are in place. If defenses are absent or misconfigured, this technique may be exploitable.
Execute Test: Use tools and methods described in the MITRE ATT&CK page and external references below.

Note: No Atomic Red Team tests available for this technique. See Atomic Red Team GitHub for updates.

Remediation Guide

M1056 Pre-compromise

This technique cannot be easily mitigated with preventive controls since it is based on behaviors performed outside of the scope of enterprise defenses and controls. Efforts should focus on minimizing the amount and sensitivity of data available to external parties.

Detection

Detection of Business Relationships

Risk Assessment

Finding	Severity	Impact
Business Relationships technique applicable	High	Reconnaissance

CWE Categories

CWE ID	Title
CWE-200	Exposure of Sensitive Information