Connect with us

Hi, what are you looking for?



Cybercriminals Spoof US Government Organizations in BEC, Phishing Attacks

Threat actor tracked as TA4903 spoofing US government entities in phishing and fraud campaigns.

Organizations in the US have been targeted since at least 2021 in various phishing and business email compromise (BEC) campaigns spoofing government and private businesses, Proofpoint reports.

The attacks, attributed to a threat actor tracked as TA4903, were focused on harvesting corporate credentials to enable BEC activities such as invoice fraud or payroll redirect.

As part of the observed attacks, the threat actor frequently registered new domains spoofing government entities and private organizations in sectors such as construction, energy, finance, food and beverage, healthcare, manufacturing, and others. 

In December 2021, TA4903 was seen masquerading as the US Department of Labor. In 2022 and 2023, the Departments of Housing and Urban Development, Commerce, Transportation, and Agriculture, and the Small Business Administration (SBA) were being spoofed.

In mid-2023, the threat actor started spoofing small and medium-sized businesses (SMBs) and increased the tempo of its BEC attacks, Proofpoint says.

Historically, TA4903’s credential phishing attacks employed PDF attachments containing links to the spoofed websites, typically using bid proposal lures. In late 2023, QR codes started appearing in the PDFs.

Last year, the threat actor was also seen diversifying the lure themes, switching to the use of HTML attachments, or zipped HTML attachments, and employing freemail addresses to deliver the phishing messages, in addition to using the domain infrastructure spoofing US entities.

Starting mid-2023, TA4903 was seen using lure themes referring to ‘cyberattack’ and ‘payment’ in its BEC attacks, and relying on domains likely spoofing the suppliers of the victim organizations. The observed messages were benign, but encouraged the victim to reply to a spoofed email address.

Advertisement. Scroll to continue reading.

After setting up a honeypot, Proofpoint observed the threat actor using purposely leaked credentials to access a dummy email account and search it for keywords such as ‘bank information’, ‘payment’, and ‘merchant’.

“Proofpoint assesses with high confidence the actor was attempting to look for existing threads to conduct BEC activities such as invoice fraud or payroll redirect using thread hijacking techniques,” Proofpoint says.

Related: FCC Employees Targeted in Sophisticated Phishing Attacks

Related: Microsoft: BEC Scammers Use Residential IPs to Evade Detection

Related: Australia Dismantles BEC Group That Laundered $1.7 Million

Written By

Ionut Arghire is an international correspondent for SecurityWeek.


Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Join the session as we discuss the challenges and best practices for cybersecurity leaders managing cloud identities.


SecurityWeek’s Ransomware Resilience and Recovery Summit helps businesses to plan, prepare, and recover from a ransomware incident.


People on the Move

Shay Mowlem has been named CMO of runtime and application security company Contrast Security.

Attack detection firm Vectra AI has appointed Jeff Reed to the newly created role of Chief Product Officer.

Shaun Khalfan has joined payments giant PayPal as SVP, CISO.

More People On The Move

Expert Insights

Related Content


A recently disclosed vBulletin vulnerability, which had a zero-day status for roughly two days last week, was exploited in a hacker attack targeting the...


The changing nature of what we still generally call ransomware will continue through 2023, driven by three primary conditions.


As it evolves, web3 will contain and increase all the security issues of web2 – and perhaps add a few more.


Luxury retailer Neiman Marcus Group informed some customers last week that their online accounts had been breached by hackers.


Zendesk is informing customers about a data breach that started with an SMS phishing campaign targeting the company’s employees.


Patch Tuesday: Microsoft calls attention to a series of zero-day remote code execution attacks hitting its Office productivity suite.

Artificial Intelligence

The release of OpenAI’s ChatGPT in late 2022 has demonstrated the potential of AI for both good and bad.


Satellite TV giant Dish Network confirmed that a recent outage was the result of a cyberattack and admitted that data was stolen.