InfoStealer

Malware Being Distributed by Disguising Itself as Icon of V3 Lite

The ASEC analysis team has discovered the distribution of malware disguised as a V3 Lite icon and packed with the .NET packer. The attacker likely created an icon that is almost identical to that of V3 Lite to trick the user, and AveMaria RAT and AgentTesla were discovered during the last month using this method. As shown in Figure 1, the icon looks almost identical to the actual V3 Lite icon. AveMaria is a RAT (Remote Administration Tool) malware with…

Amadey Bot Being Distributed Through SmokeLoader

Amadey Bot, a malware that was first discovered in 2018, is capable of stealing information and installing additional malware by receiving commands from the attacker. Like other malware strains, it has been sold in illegal forums and used by various attackers. The ASEC analysis team previously revealed cases where Amadey was used on attacks in the ASEC blog posted in 2019 (English version unavailable). Amadey was mainly used to install ransomware by attackers of GandCrab or to install FlawedAmmyy by…

New Info-stealer Disguised as Crack Being Distributed

The ASEC analysis team has previously uploaded posts about various malware types that are being distributed by disguising themselves as software cracks and installers. CryptBot, RedLine, and Vidar are major example cases. Recently, a single malware type of RedLine has disappeared (it is still being distributed as a dropper type) and a new infostealer malware is being actively distributed instead. Its distribution became in full swing starting from May 20th, globally categorized as “Recordbreaker Stealer.” Some analyses see it as…

XLL Malware Distributed Through Email

Malware strains have been created and distributed in various forms and types. As such, the ASEC analysis team is actively monitoring and analyzing such changes to allow AhnLab products to detect them. This post will introduce XLL malware that was discovered being distributed last year. XLL files are Microsoft Excel add-in files that operate with the extension .xll and can be opened by Excel. One thing to note is that the files are opened with MS Excel. This means users…

Method that Tricks Users to Perceive Attachment of PDF File as Safe File

The ASEC analysis team has discovered the distribution of info-stealer malware using Attachment feature of PDF files. This attack method was discovered previously, but as the malware of this type has resurfaced and is being actively distributed, the team would like to share the information. Note that the attacker used a simple trick of using the attachment’s name to deceive users. Acrobat Reader has a feature of adding attachments to PDF files. Files with extensions such as .bin/.exe/.bat/.chm are blacklisted…