In a past article, we introduced Linux malware ELF_TSCookie, which is used by an attack group BlackTech. This group also uses other kinds of malware that affects Linux OS. PLEAD module for Windows which we introduced before has its Linux version (ELF_PLEAD) as well. This article describe the details of ELF_PLEAD in comparison to PLEAD module. Comparison between PLEAD Module and ELF_PLEAD ELF_PLEAD and PLEAD module share many parts of...
List of “朝長 秀誠 (Shusei Tomonaga)”
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JPCERT/CC has released LogonTracer v1.5, the latest version of the event log analysis tool. While this tool was initially focused on post-incident investigation, we have received many requests for updates for the purpose of real-time log analysis. This time, we made some updates to enable such functions. This article will introduce the details of the update. Further information can be found at the following page: https://github.com/JPCERTCC/LogonTracer/releases/tag/v1.5.0 Support for Elasticsearch LogonTracer...
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In the previous article, we introduced one type of malware that Lazarus (also known as Hidden Cobra) uses after network intrusion. It is confirmed that this attack group uses multiple types of malware including BLINDINGCAN, which CISA recently introduced in its report [1]. This article summarises the result of our analysis on BLINDINGCAN. BLINDINGCAN overview The malware runs when a loader loads a DLL file. Figure 1 shows the flow...
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JPCERT/CC has observed attack activity by Lazarus (also known as Hidden Cobra) targeting Japanese organisations. Different types of malware are used during and after the intrusion. This article introduces one of the types of malware used after the intrusion. Malware Overview This malware downloads and executes modules. It is saved as a .drv file in a folder such as C:¥Windows¥System32¥ and run as a service. It is obfuscated by using...
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The Volatility Foundation released Volatility 3 Public Beta, a new version of Volatility Framework in October 2019. The version not only offers compatibility with Python 3 but also has a lot of functional updates from Volatility 2. (Please see Volatility 3's official page for more details.) Particularly, creating plugins is much easier with Volatility 3 compared to the previous version. Volatility 3’s official release is planned for August 2020, and...
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Many events in the world have been postponed or cancelled due to COVID-19 pandemic, and cyber security conferences are not the exception. While I hope events will soon be organised as in the past, I would like to introduce three cyber security conferences I recommend you to join when the current situation gets back to normal. Let me tell you first that, since I am a malware analyst, the conferences...
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JPCERT/CC released a new version of LogonTracer, a tool to support event log analysis. https://github.com/JPCERTCC/LogonTracer/releases/tag/v1.4.0 This article introduces some of the new features of the tool. Dark mode Dark mode has been added to LogonTracer in this update, which appears on the menu bar. Figure 1 shows the LogonTracer screen when the dark mode is on. Figure 1: LogonTracer (dark mode) Please note that each colour represents the following item...
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On 8 January 2020, Mozilla released an advisory regarding a vulnerability in Firefox. On 17 January, Microsoft reported that 0-day attacks exploiting a vulnerability in Internet Explorer (IE) had been seen in the wild. JPCERT/CC confirmed attacks exploiting both vulnerabilities at once and issued a security alert. This article explains the details of these attacks. Attack overview In this attack, victims are redirected to an attack site through a compromised...
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In the past blog articles, we have introduced TSCookie, PLEAD and IconDown, which are used by BlackTech. It has been identified that this group also uses several other types of malware. While the malware we have already described infects Windows OS, we have also confirmed that there are TSCookie and PLEAD variants that infect Linux OS. This article describes TSCookie for Linux, used by BlackTech. Difference between TSCookie for Windows...
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Previously, we explained about malware "TSCookie" and "PLEAD" which are used by an attack group BlackTech. Their activities have been continuously observed in Japan as of now. We have been seeing that a new malware variant is being used after they successfully intruded into a target network. This article explains the details of the variant. TSCookie used after intrusion The malware consists of 2 files (TSCookie Loader and TSCookie) as...
