In the high-stakes world of Mergers and Acquisitions (M&A), the due diligence phase is often a race against the clock. Deal teams pore over balance sheets, legal contracts, and intellectual property filings. However, in the modern era, one of the most significant liabilities a company can inherit is adopted security risk.
Are you aware of your target company’s Attack Surface?
When you acquire a company, in addition to brand assets, you also absorb every forgotten server, unpatched vulnerability, and mismanaged cloud instance they’ve ever created. This is the peril of Day Zero.
The blind spot of traditional mergers & acquisitions due diligence
Traditional cybersecurity due diligence usually relies on point-in-time assessments: security questionnaires, high-level audits, or limited internal scans. These methods have a fundamental flaw: they only tell you what the target company knows they have.
In reality, most organizations suffer from shadow assets. This is digital infrastructure like old marketing microsites, forgotten dev environments, or orphaned cloud buckets that the IT team has lost track of. These are the shadows where attackers lurk. To truly understand what you are buying, you need an objective, external view that doesn’t rely on the target’s internal documentation.
Why Attack Surface Monitoring (ASM) is the day zero essential
This is where Attack Surface Monitoring (ASM) becomes a mergers & acquisitions deal-saver. Unlike simple one-off scans, ASM provides continuous visibility into a company’s external-facing digital footprint.
For an acquiring company, ASM serves as a powerful, non-intrusive reconnaissance tool. Because it operates from an “outside-in” perspective, it can be deployed on Day Zero without requiring the target company to install agents or grant internal network access.
101domain provides and manages Red Sift ASM, which is arguably the best platform on the market.
Identifying shadow assets before the ink dries
By leveraging the expertise of 101domain to manage Red Sift ASM, an acquirer can map the target’s entire digital estate in real-time. This discovery process uncovers the risks that questionnaires miss:
- Orphaned Subdomains: Old “test” or “staging” sites that are still connected to the internet but haven’t been patched in years.
- Misconfigured Cloud Buckets: Exposed data storage that could lead to a massive data breach the moment the acquisition is announced.
- Expired or Weak Certificates: Overlooked SSL/TLS certificates that signal poor security hygiene and potential entry points for man-in-the-middle attacks.
- Unknown IP Space: Forgotten servers hosted on third-party providers that fall outside the target’s primary security perimeter.
From liability to leverage
Using Attack Surface Monitoring during the due diligence phase transforms security from a post-close headache into a strategic advantage:
- Preventing the Inherited Breach: If the target company is currently compromised (or one “Log4j” style vulnerability away from it) you need to know before you sign. ASM identifies these critical red flags so they can be remediated as a condition of the deal.
- Accurate Valuation: Security debt is real debt. If a target company requires a massive overhaul of its digital infrastructure to meet your corporate standards, that cost should be reflected in the final valuation.
- Day One Readiness: Instead of spending the first month of integration trying to figure out what the new subsidiary actually owns, your security team arrives on Day One with a complete inventory and a prioritized list of what needs to be fixed.
The 101domain advantage
Managing an attack surface is a complex, ongoing task. By utilizing Red Sift ASM managed by 101domain, you gain more than just a software tool; you gain a trusted partner that interprets the data for you.
In the chaotic environment of an M&A deal, having experts filter out the noise and highlight the critical risks allows the M&A team to focus on the deal, while the security team focuses on the defense.
And after the deal is complete, we’ll stay with you to monitor your Attack Surface going forward.
What you don’t know can hurt you. By implementing Attack Surface Monitoring on Day Zero, you ensure that your next big acquisition is a growth engine, not a gateway for a catastrophic breach.