Malware Information

RecordBreaker Infostealer Disguised as a Well-known Korean Software

The RecordBreaker Stealer is one of the main malware distributed disguised as the download of illegal programs such as cracks and keygens. It first appeared last year and has since been actively distributed to normal users. It is also referred to as Raccoon Stealer V2 and is being distributed through various channels, including websites and YouTube. CryptBot, which had been actively distributed in the same manner, had completely disappeared since February of this year, and the Vidar malware sometimes makes…

Analysis of CLR SqlShell Used to Attack MS-SQL Servers

This blog post will analyze the CLR SqlShell malware that is being used to target MS-SQL servers. Similar to WebShell, which can be installed on web servers, SqlShell is a malware strain that supports various features after being installed on an MS-SQL server, such as executing commands from threat actors and carrying out all sorts of malicious behavior. MS-SQL servers support a method known as CLR Stored Procedure which allows the usage of expanded features, and SqlShell is a DLL…

RecordBreaker Stealer Distributed via Hacked YouTube Accounts

RecordBreaker is a new Infostealer that appeared in 2022 and is known as the new version of Raccoon Stealer. Similar to other Infostealers, such as CryptBot, RedLine, and Vidar, it is a major malware type that usually disguises itself as a software crack or installer. AhnLab Security Emergency response Center (ASEC) has confirmed the distribution of RecordBreaker through a YouTube account that is assumed to have been recently hacked. 1. Previous Distribution Cases Search engines are one of the major…

Qakbot Distributed via OneNote and CHM

AhnLab Security Emergency response Center (ASEC) has covered various distribution methods of Qakbot, and the method of distributing through OneNote was covered back in February. The distribution of Qakbot through OneNote has been confirmed again recently, and it was discovered that the Windows Help file (CHM) was used in this recent attack. Qakbot Being Distributed via OneNote Upon executing the OneNote file, it prompts users to click on the Open button along with a Microsoft Azure image, as shown below….

CoinMiner (KONO DIO DA) Distributed to Linux SSH Servers

AhnLab Security Emergency response Center (ASEC) has recently discovered XMRig CoinMiner being installed on poorly managed Linux SSH servers. The attacks have been happening with a distinct pattern since 2022: they involve the usage of malware developed with Shell Script Compiler (SHC) when installing the XMRig, as well as the creation of a backdoor SSH account. When looking at the attack cases against poorly managed Linux SSH servers, most of them involve the installation of DDoS Bot or CoinMiner. DDoS…