Construction companies stop wire fraud with three layers working together: email security that blocks and flags impersonation attempts, a verification rule requiring a phone call to a previously known number before any banking detail changes, and access controls that keep one compromised inbox from reaching payment systems. Rudick Innovation & Technology puts those controls in place for construction companies across Austin, because payment fraud in this industry is not a technology failure alone; it is a process failure that technology can catch.
The attack is depressingly simple. Somebody watches an inbox for weeks, learns the draw schedule, notes how your project accountant writes, and then sends a routine-looking email updating a subcontractor’s remittance details right before a payment goes out. The wire clears. By the time the real sub calls asking where their money is, recovery windows have usually closed.
Why construction is such an attractive target
Every industry faces business email compromise. Construction offers attackers an unusually good set of conditions.
Payments are large and scheduled, so a criminal who understands your draw cycle knows roughly when significant money moves. Communication is fragmented across owners, general contractors, subs, suppliers, and design teams, which means an unfamiliar email address is unremarkable. Documents that authorize money, including pay applications and lien waivers, routinely travel by email as attachments. And schedule pressure makes people act quickly, which is precisely the condition fraud depends on.
Add the volume of legitimate banking changes that genuinely occur when subs switch banks or factor receivables, and you have an environment where a fraudulent request looks entirely ordinary.
The four ways it usually starts
A compromised vendor inbox. The most effective version. The email is genuinely from your subcontractor’s real account, because that account was taken over. Nothing about the address or the thread looks wrong, because nothing is wrong except who is typing.
A lookalike domain. One character changed in a domain name, easily missed on a phone. Attackers register these specifically for a target and often warm them up for weeks first.
An internal account takeover. Your own project accountant’s credentials are stolen, usually through a phishing page that harvests a password. Rules get created quietly to hide replies, and the attacker operates from inside your own conversations.
A fake lien waiver or pay application. Documents are altered to redirect payment, arriving through what looks like normal project correspondence.
Notice that only one of these is stopped by better spam filtering. That is why the process controls matter as much as the technical ones. Our overview of the cybersecurity threats facing Texas AEC firms in 2026 covers how these techniques have evolved.
The one rule that stops most of it
If a construction company adopts a single control, it should be this: no banking or remittance detail changes without a voice verification to a phone number already on file, never a number contained in the request itself.
The rule needs to be absolute, written, and applied to everyone including the owner. Fraud attempts frequently impersonate leadership specifically because staff hesitate to question them, so the policy has to remove the judgment call. It is not distrust, it is a control, and the subs worth working with will respect it.
Attach a second rule to it. Any request that arrives with urgency attached, particularly one that discourages verification or claims a payment deadline, triggers additional scrutiny rather than less. Urgency is the most consistent signal in these attacks.
The technical controls that back the rule up
Process fails without technology behind it, because people are busy and draws are stressful.
Start with multi-factor authentication everywhere, including accounting systems, email, and remote access. Credential theft is the entry point for internal account takeover, and multi-factor authentication removes most of that risk immediately.
Add advanced email protection that inspects for impersonation, lookalike domains, and anomalous sender behavior rather than only scanning for malware. Configure external sender warnings so a message from outside the company is visibly marked, which quietly defeats a large share of lookalike domain attempts.
Enforce email authentication on your own domain using SPF, DKIM, and DMARC, so criminals cannot easily send mail that appears to come from your company to your subs and owners. This protects your partners and your reputation, and it is increasingly something owners ask about during prequalification.
Monitor for the specific behaviors that indicate takeover, including new inbox rules that hide messages, sign-ins from unexpected locations, and mass mailbox forwarding. Those signals are detectable, and catching them early is the difference between a scare and a loss. This is exactly what our cybersecurity monitoring covers, running alongside our managed IT services.
Train the people who touch money
Security awareness training gets treated as a checkbox, and in most companies it is delivered as a generic video that has nothing to do with construction.
It works far better when the scenarios are real. Show your accounting team an actual altered lien waiver. Walk your project managers through a fraudulent banking change email written in the format your subs actually use. Run simulated phishing that references a draw cycle rather than a fictional package delivery.
The staff who need this most are specific: accounting, project managers, anyone with authority to approve payment, and executive assistants. That is a small enough group to train properly rather than broadly. Our post on whether your employees are your biggest cybersecurity risk covers how to structure that program.
What to do in the first hour if a wire goes out
Speed determines recovery. Call your bank immediately and request a recall, because the window in which funds can be frozen is measured in hours, not days.
File a report with the FBI Internet Crime Complaint Center at IC3.gov the same day, since the Financial Fraud Kill Chain can sometimes freeze funds when reported quickly. Notify your cyber liability carrier before taking remediation steps that might affect coverage. Preserve the emails rather than deleting them. And assume any involved mailbox is compromised until proven otherwise, which means resetting credentials and reviewing forwarding rules right away.
Have this written down before you need it. An incident response plan that exists only as an intention is not a plan, and our backup and disaster recovery engagements include building the version your team can actually follow under pressure.
Put the controls in before the next draw
Austin’s construction market moves fast, and the pace that makes it attractive is the same pace attackers count on. Rudick delivers construction IT services in Austin from our Capital of Texas Highway office, covering email security, access control, monitoring, and the training that makes the process stick, for firms working from Downtown and East Austin out to The Domain, Round Rock, and Cedar Park.
Call (469) 916-9362 or book an appointment, and we will review where your payment process is currently exposed.
Frequently asked questions
Does cyber liability insurance cover wire fraud?
Sometimes, and often under a separate social engineering endorsement with lower limits than the main policy. Check the specific wording, because many contractors assume coverage they do not have.
Our subs send banking changes by email constantly. Is that normal?
It is common, and it is the exact behavior attackers exploit. Establishing a verification process with your regular subs benefits both sides and makes the fraudulent version stand out.
Can we stop this without slowing down our draw cycle?
Yes. A verification call takes two minutes and happens once per change, not once per payment. Compared to the delay a fraudulent wire causes, it is not close.
We are a 30-person contractor. Are we really a target?
Yes, and increasingly the preferred one. Smaller contractors move meaningful money with fewer controls, which makes them efficient targets.