Credit to Author: Ieriz Nicolle Gonzalez| Date: Fri, 07 Jul 2023 00:00:00 +0000
We analyze the technical details of a new ransomware family named Big Head. In this entry, we discuss the Big Head ransomware’s similarities and distinct markers that add more technical details to initial reports on the ransomware.
Read moreCredit to Author: Lucas Silva| Date: Fri, 30 Jun 2023 00:00:00 +0000
We found that malicious actors used malvertising to distribute malware via cloned webpages of legitimate organizations. The distribution involved a webpage of the well-known application WinSCP, an open-source Windows application for file transfer. We were able to identify that this activity led to a BlackCat (aka ALPHV) infection, and actors also used SpyBoy, a terminator that tampers with protection provided by agents.
Read moreCredit to Author: Peter Girnus| Date: Tue, 20 Jun 2023 00:00:00 +0000
This is the third installment of a three-part technical analysis of the fully undetectable (FUD) obfuscation engine BatCloak and SeroXen malware. In this entry, we document the techniques used to spread and abuse SeroXen, as well as the security risks, impact, implications of, and insights into highly evasive FUD batch obfuscators.
Read moreCredit to Author: Peter Girnus| Date: Thu, 15 Jun 2023 00:00:00 +0000
We looked into the documented behavior of SeroXen malware and noted the inclusion of the latest iteration of the batch obfuscation engine BatCloak to generate a fully undetectable (FUD) .bat loader. This is the second part of a three-part series documenting the abuse of BatCloak’s evasion capabilities and interoperability with other malware.
Read moreCredit to Author: Peter Girnus| Date: Fri, 09 Jun 2023 00:00:00 +0000
We look into BatCloak engine, its modular integration into modern malware, proliferation mechanisms, and interoperability implications as malicious actors take advantage of its fully undetectable (FUD) capabilities.
Read moreCredit to Author: Feike Hacquebord| Date: Tue, 30 May 2023 00:00:00 +0000
Void Rabisu, a malicious actor believed to be associated with the RomCom backdoor, was thought to be driven by financial gain because of its ransomware attacks. But in this blog entry, we discuss how the use of the RomCom backdoor in recent attacks shows how Void Rabisu’s motives seem to have changed since at least October 2022.
Read moreCredit to Author: Sarah Pearl Camiling| Date: Fri, 26 May 2023 00:00:00 +0000
This is an analysis of Bandit Stealer, a new Go-based information-stealing malware capable of evading detection as it targets multiple browsers and cryptocurrency wallets.
Read moreCredit to Author: Nitesh Surana| Date: Tue, 23 May 2023 00:00:00 +0000
In this entry, we detail our research findings on how an info stealer is able to achieve persistence on a victim’s machine by modifying the victim’s Discord client.
Read moreCredit to Author: Nitesh Surana| Date: Fri, 19 May 2023 00:00:00 +0000
This is the first part of our security analysis of an information stealer targeting GitHub Codespaces (CS) that discusses how attackers can abuse these cloud services for a variety of malicious activities.
Read moreCredit to Author: Fyodor Yarochkin| Date: Wed, 17 May 2023 00:00:00 +0000
An overview of the Lemon Group’s use of preinfected mobile devices, and how this scheme is potentially being developed and expanded to other internet of things (IoT) devices. This research was presented in full at the Black Hat Asia 2023 Conference in Singapore in May 2023.
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