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The fake USPS phishing page.
Recent weeks have seen a sizable uptick in the number of phishing scams targeting U.S. Postal Service (USPS) customers. Here’s a look at an extensive SMS phishing operation that tries to steal personal and financial data by spoofing the USPS, as well as postal services in at least a dozen other countries.
KrebsOnSecurity recently heard from a reader who received an SMS purporting to have been sent by the USPS, saying there was a problem with a package destined for the reader’s address. Clicking the link in the text message brings one to the domain usps.informedtrck[.]com.
The landing page generated by the phishing link includes the USPS logo, and says “Your package is on hold for an invalid recipient address. Fill in the correct address info by the link.” Below that message is a “Click update” button that takes the visitor to a page that asks for more information.
The remaining buttons on the phishing page all link to the real USPS.com website. After collecting your address information, the fake USPS site goes on to request additional personal and financial data.
This phishing domain was recently registered and its WHOIS ownership records are basically nonexistent. However, we can find some compelling clues about the extent of this operation by loading the phishing page in Developer Tools, a set of debugging features built into Firefox, Chrome and Safari that allow one to closely inspect a webpage’s code and operations.
Check out the bottom portion of the screenshot below, and you’ll notice that this phishing site fails to load some external resources, including an image from a link called fly.linkcdn[.]to.
Click the image to enlarge.
A search on this domain at the always-useful URLscan.io shows that fly.linkcdn[.]to is tied to a slew of USPS-themed phishing domains. Here are just a few of those domains (links defanged to prevent accidental clicking):
usps.receivepost[.]com
usps.informedtrck[.]com
usps.trckspost[.]com
postreceive[.]com
usps.trckpackages[.]com
usps.infortrck[.]com
usps.quicktpos[.]com
usps.postreceive].]com
usps.revepost[.]com
trackingusps.infortrck[.]com
usps.receivepost[.]com
usps.trckmybusi[.]com
postreceive[.]com
tackingpos[.]com
usps.trckstamp[.]com
usa-usps[.]shop
usps.infortrck[.]com
unlistedstampreceive[.]com
usps.stampreceive[.]com
usps.stamppos[.]com
usps.stampspos[.]com
usps.trckmypost[.]com
usps.trckintern[.]com
usps.tackingpos[.]com
usps.posinformed[.]com
As we can see in the screenshot below, the developer tools console for informedtrck[.]com complains that the site is unable to load a Google Analytics code — UA-80133954-3 — which apparently was rejected for pointing to an invalid domain.
Notice the highlighted Google Analytics code exposed by a faulty Javascript element on the phishing website. Click to enlarge. That code actually belongs to the USPS.
The valid domain for that Google Analytics code is the official usps.com website. According to dnslytics.com, that same analytics code has shown up on at least six other nearly identical USPS phishing pages dating back nearly as many years, including onlineuspsexpress[.]com, which DomainTools.com says was registered way back in September 2018 to an individual in Nigeria.
A different domain with that same Google Analytics code that was registered in 2021 is peraltansepeda[.]com, which archive.org shows was running a similar set of phishing pages targeting USPS users. DomainTools.com indicates this website name was registered by phishers based in Indonesia.
DomainTools says the above-mentioned USPS phishing domain stamppos[.]com was registered in 2022 via Singapore-based Alibaba.com, but the registrant city and state listed for that domain says “Georgia, AL,” which is not a real location.
Alas, running a search for domains registered through Alibaba to anyone claiming to reside in Georgia, AL reveals nearly 300 recent postal phishing domains ending in “.top.” These domains are either administrative domains obscured by a password-protected login page, or are .top domains phishing customers of the USPS as well as postal services serving other countries.
Those other nations include the Australia Post, An Post (Ireland), Correos.es (Spain), the Costa Rican post, the Chilean Post, the Mexican Postal Service, Poste Italiane (Italy), PostNL (Netherlands), PostNord (Denmark, Norway and Sweden), and Posti (Finland). A complete list of these domains is available here (PDF).
A phishing page targeting An Post, the state-owned provider of postal services in Ireland.
The Georgia, AL domains at Alibaba also encompass several that spoof sites claiming to collect outstanding road toll fees and fines on behalf of the governments of Australia, New Zealand and Singapore.
An anonymous reader wrote in to say they submitted fake information to the above-mentioned phishing site usps.receivepost[.]com via the malware sandbox any.run. A video recording of that analysis shows that the site sends any submitted data via an automated bot on the Telegram instant messaging service.
The traffic analysis just below the any.run video shows that any data collected by the phishing site is being sent to the Telegram user @chenlun, who offers to sell customized source code for phishing pages. From a review of @chenlun’s other Telegram channels, it appears this account is being massively spammed at the moment — possibly thanks to public attention brought by this story.
Meanwhile, researchers at DomainTools recently published a report on an apparently unrelated but equally sprawling SMS-based phishing campaign targeting USPS customers that appears to be the work of cybercriminals based in Iran.
Phishers tend to cast a wide net and often spoof entities that are broadly used by the local population, and few brands are going to have more household reach than domestic mail services. In June, the United Parcel Service (UPS) disclosed that fraudsters were abusing an online shipment tracking tool in Canada to send highly targeted SMS phishing messages that spoofed the UPS and other brands.
With the holiday shopping season nearly upon us, now is a great time to remind family and friends about the best advice to sidestep phishing scams: Avoid clicking on links or attachments that arrive unbidden in emails, text messages and other mediums. Most phishing scams invoke a temporal element that warns of negative consequences should you fail to respond or act quickly.
If you’re unsure whether the message is legitimate, take a deep breath and visit the site or service in question manually — ideally, using a browser bookmark so as to avoid potential typosquatting sites.
Update: Added information about the Telegram bot and any.run analysis.
Imagine this: Your CEO sends you an email asking for your help transferring $5,000 to a new vendor for an urgent project. You make the transfer, only to find out later that the email was actually from an imposter, and that money is now in the hands of cybercriminals. Oops, right? crickets
Business Email Compromise (BEC) is a type of cybercrime that involves compromising or imitating legitimate business email accounts to carry out fraudulent transactions or steal sensitive information. The goal of a BEC attack is typically to trick the victim into transferring money, clicking on a malicious link, or disclosing sensitive information such as login credentials. BEC attacks can have a devastating impact on organizations of all sizes and in all industries, making it essential for businesses to be aware of the threat, understand the business risk, and take the necessary steps to protect themselves.
According to the latest FBI IC3 report, BEC is “one of the most financially damaging online crimes” and in 2021 was accountable for $2.4 Billion in adjusted losses for businesses and consumers.
One of the most common types of BEC attacks is called impersonating or email spoofing. By pretending to be a trusted colleague or business partner to gain the victim’s trust, the attacker uses social engineering techniques to trick the victim into clicking on a link or attachment in an email that contains malware, takes the victim to a malicious website, and has them transfer funds or change payment information.
BEC attacks can be very sophisticated and are difficult to detect. Many times, what the end-user sees on their email client does not represent the true email address of that sender, or it shows one that has been spoofed.
Typically, the attacker tries to impersonate someone in the organization with enough authority to not be questioned about what he/she is asking to be done.
As with everything in security, to be able to succeed in stopping BEC attacks, additional security layers & techniques should be implemented. There are several options to mitigate or reduce the number of successful BEC attacks. Creating a list of the people who will be likely to be impersonated will provide the best results. Usually, with names from the CxO level, this is known as a High Impact Personnel list. It will be used along with other security analysis engines to make sure any impersonated/spoof emails, along with other threats, get stopped and will not reach the end user.
The Cisco Secure Email Threat Defense solution leverages hundreds of detection engines that utilize state-of-the-art artificial intelligence/machine learning and natural language processing to convict messages from the most creative attackers! On top of this, our customers can define their High Impact Personnel list, and together with the other detection engines, will be able to not only block malicious messages but also understand the reasons and categories of why a message is being convicted as malicious.
In summary, Business Email Compromise (BEC) is a serious threat to organizations of all sizes and in all industries. To protect against BEC attacks, businesses should implement multiple techniques including identifying their High Impact Personnel for their organization, educating employees about the threat, and relying on reporting to understand who is being targeted most frequently so their security policies can be adjusted.
See how Secure Email Threat Defense identifies specific business risk factors to protect your organization.
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