Analysis of APT28 hospitality malware (Part 2)

In the first part of this malware review, we looked at the VBA code used by APT28 to drop a DLL onto the victims' machine as part of their recently highlighted hospitality campaign. In this post, we will look at the dropped file, and understand just what it does, and how we can analyse it using IDA Pro. So we know from the first post that we have a DLL, which is run using the following command: rundll32.exe %APPDATA%\user.dat,#1 Loading the extracted DLL into IDA, the first thing that we notice is that we have an exported function of load with an ordinal of 1: We know from the rundll32.exe com…

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Analysis of APT28 hospitality malware

This week, FireEye published a writeup of yet another APT28 campaign, this time targeting the hospitality sector: Exposing Russian hackers #APT28 and their targeting of hotels & travelers. Also first targeted use of ETERNALBLUE.https://t.co/iiHh71UQeF pic.twitter.com/SIMeDd7MTM— Nick Carr (@ItsReallyNick) August 11, 2017 I'm always interested to see the latest APT group techniques, so I decided to review the malware to see how the dropper worked (and see if there were any goodies I could add to my toolkit). The dropper was shown to be a typical Word .docm file (MD5: 9b10685b774a78…

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How GitHub login detection banner works

Sometimes I come across things non-security related that intrigue me, albeit mostly I'm thinking how I can use it to exploit a service, but still... One such piece of functionality caught my interest, a banner displayed at the top of GitHub: I was thinking of the different ways that this type of functionality could be achieved. We have seen similar methods of detection exploited in the past to leak out information, although much more targeted at cross-origin detection (such as Social Media Fingerprint which identify images only delivered to authenticated users). I fired up Chrome's network act…

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Industroyer C2 Communication

As part of my day job, I work for Secarma (previously known as Pentest Limited) as a Senior Penetration Tester. During engagements, the question of malware threats is increasingly raised, in part due to media focus on APT groups such as APT28, and malware campaigns such as WannaCry. While looking into another malware variant recently uncovered by ESET, Industroyer, I started reviewing the protocol used to communicate with the backdoor component of the malware. Details of the research have been published under Secarma Labs, which can be found here. A video demonstrating the malware in action,…

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