Esvalabs Security Blog
Stay up to date with the latest findings for our Esvalabs
New wave of EXCEL 4.0 malware campaigns abusing FORMULA macro function
VBA has been introduced in Excel 5.0. Before then Excel only had XLM macros, which are still supported today. XLM macros allow writing code by entering statements directly into cells, just like normal formulas. In fact they are called macro-formulas. In case you are curious, the reference document of the Excel 4.0 macro functions is […]
Exploiting Fear as a Threat Actor
One of Libraesva’s Security Researchers recently discovered, along with other security vendors, targeted phishing and whaling campaigns all based around the Coronavirus outbreak, we don’t believe in playing on the fear, but its always good to see how these attacks work and why they work. Figure 1 shows the email in question we received and […]
What is an Evasion Technique?
What exactly are Evasion Techniques? Evasion techniques are what malicious payloads use to avoid detection from Sandboxing services, Malware authors have two priorities when creating malware, being silent and being deadly, getting as much as they can for as little effort as possible. We thought it’d be wise to talk about how effective these evasion […]
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