Threat landscape

Know the threats aimed at your business.

A field guide to the attack techniques our analysts see most often — what they are, how they work in practice, and the controls that make them far less effective.

Phishing

High

Deceptive emails, texts, or messages designed to trick people into revealing credentials or clicking malicious links.

How it works

Attackers impersonate trusted brands or colleagues, often using urgency (“your account will be suspended”) and convincing lookalike domains.

How to defend

  • Enable MFA on every account that supports it
  • Configure SPF, DKIM and DMARC on your domains
  • Run regular, realistic phishing simulations
  • Provide a one-click “report phish” button

Ransomware

Critical

Malware that encrypts your data and demands payment — often while also threatening to leak stolen information.

How it works

Typically arrives via phishing, exposed RDP, or unpatched internet-facing systems, then spreads laterally before encrypting at scale.

How to defend

  • Keep offline or immutable backups and test restores
  • Segment networks so lateral movement is blocked
  • Patch internet-facing systems within days, not months
  • Use modern EDR with behavioural detection

Malware

High

Any software written to damage, disrupt, or gain unauthorised access — including trojans, droppers, info-stealers and spyware.

How it works

Delivered through malicious attachments, drive-by downloads, cracked software, or supply-chain compromises of legitimate tools.

How to defend

  • Deploy EDR and keep definitions up to date
  • Block execution from Downloads and Temp folders
  • Only install software from trusted, signed sources
  • Remove local admin rights from day-to-day accounts

Social Engineering

High

Manipulating people into breaking security procedures — whether by phone, chat, email, or in-person impersonation.

How it works

Attackers research your staff and processes, then exploit trust, authority or urgency to bypass technical controls entirely.

How to defend

  • Define a strict procedure for payment and access changes
  • Verify unusual requests via a known second channel
  • Train staff to pause and report, not to comply quickly
  • Limit information publicly exposed on your website and LinkedIn

Insider Threats

Medium

Risk from people who already have legitimate access — whether malicious, negligent, or compromised employees and contractors.

How it works

Abuse of over-broad permissions, data exfiltration to personal storage, or accidental exposure through misconfiguration.

How to defend

  • Enforce least privilege across systems and shares
  • Log and alert on sensitive data access
  • Remove access the moment employment ends
  • Use DLP to flag large or unusual data movement

DDoS

Medium

Distributed Denial-of-Service attacks flood your infrastructure with traffic to knock services offline.

How it works

Botnets or amplification techniques generate huge volumes of requests that exhaust bandwidth, compute, or application resources.

How to defend

  • Put a DDoS-aware CDN or scrubbing service in front
  • Rate-limit at both network and application layers
  • Design stateless, horizontally scalable services
  • Have a documented runbook for attack conditions

Credential Stuffing

High

Automated login attempts using username and password pairs leaked from unrelated breaches.

How it works

Because people reuse passwords, attackers try leaked credentials against your login endpoints en masse, often from residential proxy networks.

How to defend

  • Enforce MFA and check passwords against breach lists
  • Rate-limit and monitor authentication endpoints
  • Detect anomalous login velocity and geography
  • Use passkeys or WebAuthn where feasible

Zero-Day Exploits

Critical

Attacks that leverage previously unknown vulnerabilities, before vendors have released a patch.

How it works

Skilled attackers — or buyers of commercial exploit kits — target unpatched software, browsers, VPNs, or firewalls for initial access.

How to defend

  • Maintain an inventory of internet-exposed services
  • Subscribe to vendor and CISA advisories
  • Deploy rapid emergency patching processes
  • Use behavioural EDR to catch post-exploitation activity