Around February 2023, JPCERT/CC identified an attack that attempted to infect a crypto asset exchanger with the Parallax RAT malware. This attack attempted to infect employees of the crypto asset exchanger with malware by sending spam emails. This article presents the details of this attack.Flow of events leading to Parallax RAT infectionFigure 1 shows the flow of this attack. The identified attack starts with a spam email, which urges the...
List of “Malware”
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I believe that automating analysis is a challenge that all malware analysts are working on for more efficient daily incident investigations. Cloud-based technologies (CI/CD, serverless, IaC, etc.) are great solutions that can automate MAOps efficiently. In this article, I introduce how JPCERT/CC automates malware analysis on the cloud, based on the following case studies. Malware C2 Monitoring Malware Hunting using Cloud YARA CI/CD system Surface Analysis System on Cloud Memory...
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JPCERT/CC is continuously investigating the activities by Lazarus. In ...
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Some types of malware use DGA, obfuscate destination information, or c...
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To conceal malware’s features, attackers sometimes encode the malware and decode it only when they execute it. In such cases, the encoded malware is loaded and executed by a program called loader. In this way, an attacker can split the malware into a loader and encoded malware. Minimizing the loader’s features and hiding important features of the malware make detection on infected hosts more difficult. Among such loaders, this article...
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Malware targeting Windows OS (PE format) has a variety of obfuscation and packing techniques in place so that they complicate the code analysis processes. On the other hand, there are only a few types of packing techniques for Linux-targeting malware (ELF format), and it is mainly UPX-based. This blog article explains the details of Anti-UPX Unpacking technique, which is often applied to Linux-targeting malware. Malware with Anti-UPX Unpacking Technique The...
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Since around 2018, JPCERT/CC has observed an increasing number of mali...
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During JSAC2021 on 28 January 2021, there was a presentation about an attack group LuoYu, which targets Korean and Japanese organisations since 2014 [1][2]. Recently, JPCERT/CC came across malware WinDealer used by this group. This article introduces some findings of our analysis.Malware WinDealer overviewWinDealer steals information of an infected PC and sends it to a C2 server as described in Figure 1.Figure 1: Malware WinDealer behaviour overviewOnce launched, the malware...
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An attack group BlackTech has been actively conducting attacks against Japanese organisations since 2018. Although it is not as prominent as before, JPCERT/CC is still seeing some cases as of now. This article introduces the details of the malware Gh0stTimes, which is used by this group. Gh0stTimes overview Gh0stTimes is customised based on Gh0st RAT and has been used in some attack cases since 2020. Figure 1 shows the comparison...
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The functions and evolution of malware LODEINFO have been described in our past articles in February 2020 and June 2020. Yet in 2021, JPCERT/CC continues to observe activities related to this malware. Its functions have been expanding with some new commands implemented or actually used in attacks. This article introduces the details of the updated functions and recent attack trends. LODEINFO versions At the time of the last blog update,...