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Backdooring NSIS based installer: A Cautionary Tale

1 Jan 20203 Jan 2020
Understandably, this post does not follow the theme of malware analysis of this blog. However, it would be fair to add some range to the topics here. This post came…
macros…

TA505 campaign: Macro Analysis

10 Nov 201912 Nov 2019
Starting September we have seen a rise in campaigns from TA505 threat actor. They send emails in bulk with spoofed messages regarding hosted files on (spoofed) cloud share services. The…
emotet…

API address resolution (Emotet)

2 Oct 201923 Dec 2019
Since the Emotet campaign has been back again for the past 2 weeks I got my hands on one of the samples (3e269b0ba5c550cd0636355f2b8da977dac2dc4ad42bcf8b917322006ccf4745) that someone tweeted and started to dissect.…
ransomware…

Reversing: Locky Osiris (Part II)

12 Mar 201714 Mar 2017
For this post I would be using IDA Pro and OllyDbg. While jumping back and forth between these tools I will follow the naming convention of IDA Pro more often than OllyDbg.…
ransomware…

Reversing: Locky Osiris (Part I)

8 Feb 201710 Feb 2017
I was hoping for this to be my last post about Osiris, but since the DLL (shtefans1.spe) is packed it would not be possible for me to cover reverse engineering in one…
macros…

Macros: Locky Osiris

28 Jan 20179 Feb 2017
In this post we will go through the macro code for the excel file that was used to bait users into downloading and dropping the malware payload. The macros (ThisWB, Module1) that we…
ransomware…

Static Analysis: Locky Osiris

22 Jan 20179 Feb 2017
This post is a continuation of the previous blog post about recent Locky variant. Now let's use OfficeMalScanner to confirm the existence of bin files. As we can see, there is…
ransomware

Locky Osiris

13 Jan 20179 Feb 2017
There was a recent Locky resurgence with Osiris variant past December. However, it's too late to post this analysis for others to be benefitted by it, it would still be…

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The ideas and views expressed in this blog are mine only and not my employer's. The analyses posted in this blog are results of my hobby and in no way work-related.

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