Phishing has been the number one attack vector for over five years and it is important that your entire workforce knows the signs of a phishing email. Everyone is a target in today’s cyberwar climate. Organizations of all sizes experience frequent, extremely sophisticated, phishing attacks and it is unrealistic to expect IT and security teams to fight that battle alone using just technology. The reality is, as humans are the ones being targeted, humans must be the primary defense against attackers trying to gain access to information systems.
To Stop Phishers You Need to Spot Their Hook
Successful phishing attacks give attackers a foothold in corporate networks, access to vital information such as intellectual property, and in some cases money. There are numerous ‘definitions’ of phishing, but ultimately it is any type of attack by email that is designed to result in the recipient taking a specific course of action. This could be clicking a link that leads to a compromised website, opening a malware-laden attachment, or divulging valuable information such as usernames and passwords.
Increasingly, phishing emails are carefully researched and contrived to target specific recipients. Given the number and intensity of data breaches in recent years there is a wealth of information available to phishers to use when honing their prose, making it even tougher to spot signs of a phishing email and discern fact from fiction.
The increasing sophistication of phishing attacks makes it difficult for technology to identify email-borne threats and block them. However, phishing emails typically have a range of “hooks” that, if spotted by the recipient, can prevent the attack from being successful. The following are some of hooks – or signs of a phishing email – that can indicate an email is not as genuine as it appears to be.
An Unfamiliar Tone or Greeting
The first thing that usually arouses suspicion when reading a phishing message is that the language isn’t quite right – for example a colleague is suddenly over familiar, or a family member a little more formal. For instance, if I personally were to receive an email from Cofense’s CTO that began with “Dear Scott,” that would immediately raise a red flag. In all of our correspondence over the years, he has never begun an email with that greeting so it would feel wrong. If a message seems strange, it’s worth looking for other indicators that this could be from an attacker.
Grammar and Spelling Errors
One of the more common signs of a phishing email is bad spelling and the incorrect use of grammar. Most businesses have the spell check feature on their email client turned on for outbound emails. It is also possible to apply autocorrect or highlight features on most web browsers. Therefore, you would expect emails originating from a professional source to be free of grammar and spelling errors.
Inconsistencies in Email Addresses, Links & Domain Names
Another simple way to spot a potential phishing attack is to look for discrepancies in email addresses, links and domain names. For example, it is worth checking against previous correspondence that originating email addresses match. If a link is embedded in the email, hover the pointer over the link to verify what ‘pops up’. If the email is allegedly from PayPal, but the domain of the link does not include “paypal.com,” that’s a huge giveaway. If the domain names don’t match, don’t click.
Threats or a Sense of Urgency
Emails that threaten negative consequences should always be treated with suspicion. Another tactic is to use a sense of urgency to encourage, or even demand, immediate action in a bid to fluster the receiver. What the scammer hopes is, in haste, the content might not be examined thoroughly so other inconsistencies associated with a phishing campaign may pass undetected.
If an email with an attached file is received from an unfamiliar source, or if the recipient did not request or expect to receive a file from the sender of the email, the attachment should be opened with caution. If the attached file has an extension commonly associated with malware downloads (.zip, .exe, .scr, etc.) – or has an unfamiliar extension – recipients should flag the file the file to be virus-scanned before opening.
Leading on from the point above, if the email is asking for something to be done that is not the norm, then that too is an indicator that the message is potentially malicious. For example, if it claims to be from the IT team asking for a program to be installed, or a link to patch the PC followed, yet this type of activity is typically handled centrally, that’s a big clue not to follow the instructions.
Short and Sweet
While many phishing messages will be stuffed with details designed to offer a false security, some phishing messages have also been sparse in information hoping to trade on their ambiguity. For example, a scammer that spoofs an email from Jane at a company that is regularly dealt with, has the vague message ‘here’s what you requested’ and an attachment titled ‘additional information’ hopes they’ll get lucky.
Recipient Did Not Initiate the Conversation
Because phishing emails are unsolicited, an often-used hook is to inform the recipient he or she has won a prize, will qualify for a prize if they reply to the email, or will benefit from a discount by clicking on a link or opening an attachment. In cases where the recipient did not initiate the conversation by opting in to receive marketing material or newsletters there is a high probability that the email is suspect.
Request for Credentials, Payment Information or Other Personal Details
One of the most sophisticated types of phishing email is when an attacker has created a fake landing page that recipients are directed by a link in an official looking email. The fake landing page will have a log in box or request that a payment is made to resolve an outstanding issue. If the email was unexpected, recipients should visit the website from which the email has supposedly come by typing in the URL – rather than clicking on a link – to avoid entering their login credentials of the fake site or making a payment to the attacker.
See Something, Say Something
Identification is the first step in the battle against phishers. However chances are, if one employee is receiving phishing emails, others are as well. Organizations need to condition employees to report signs of a phishing email – it’s the old adage of “If you see something, say something,” to alert security or the incident response team.
A complication of this is then sifting through the various reports to eliminate false positives. One method is to prioritize alerts received from users who have a history of positively identifying phishing attempts. These employee-sourced, prioritized reports provide the incident response (IR) team and security operations analysts with the information needed to rapidly respond to potential phishing attacks and mitigate the risk from those that may fall prey to them.
Train Your Workforce to Spot Signs of a Phishing Email
A workforce that has been properly prepared to consistently spot and report suspicious email activity is a critical foundation to any security program’s threat management strategy. Instead of the target, the workforce becomes cybercrime sentinels.