Here is a quick writeup of some DarkComet RAT malspam that I was able to find this morning. The infection method is leveraging the standard RTF buffer overflow technique (CVE-2017-11882). For more information about what DarkComet is, please see the following link: https://www.contextis.com/en/blog/malware-analysis-dark-comet-rat All artifacts can be found over at…
While looking through the email filters this morning, I came across several emails that had malicious Word docs attached to them. The sender was the same for all the emails along with the document that was attached. This is a write-up of what I was able to get from the…
This is a quick write-up of some Agent Telsa malspam that I was able to find within our email filters. For a good overview of what this malware is and how it works, please see the following links: https://krebsonsecurity.com/2018/10/who-is-agent-tesla/ https://www.fortinet.com/blog/threat-research/analysis-of-new-agent-tesla-spyware-variant.html For the artifacts found from this investigation, please see my…
There was a phishing email that came in the other day that looked interesting. When I went to the URL found in the PDF, it linked to an ARJ archive file. Once i downloaded this file and extracted it, I saw that there was a VBScript file. Opening this file…
Looking through the email filters in on the 18th of September, I managed to find a small batch of emotet emails from the same sender. The emails themselves tried to spoof email addresses, but Outlook ended up displaying both emails (the spoof and the true sender). Looking through the small…
A quick write-up on this Remcos malspam. Some other previous entries that I have done aboutr Remcos can be found below: https://www.herbiez.com/?p=1106 https://www.herbiez.com/?p=1073 All the emails seem to come from the sender info@yusheng-wiremesh.com with the subject of “Returned Funds fort Invoice DFER4567 July Despatch.” The malspam also comes with an…
For this post, I was able to find some Formbook malspam within the email filters. Formbook malware is considered to be a data theft/form grabber with some other add-ons under it’s tool belt. Based on the following deep dives into Formbook from FireEye (https://www.fireeye.com/blog/threat-research/2017/10/formbook-malware-distribution-campaigns.html) and ThisIsSecurity (https://thisissecurity.stormshield.com/2018/03/29/in-depth-formbook-malware-analysis-obfuscation-and-process-injection/), this malware sample…
For something different today, found some DHL inspired LokiBot malspam in the email filters. LokiBot is considered an information stealer as it looks through the system for any credentials that it can grab. As Brad mentioned in an older SANS ISC blog entry, the emails that LokiBot uses vary and…
Quick post for today. Looks like some more Emotet maldocs. As usual, these two dealt with an invoice of some sort. While the sender is not the same in both instances, and the hash of the attachments are different as well, they both end up using the same URLs to…
Yesterday while looking for some malspam, I came across some emails that used the CVE-2017-11882 exploit which leveraged an AutoIT script to launch the Remcos keylogger process which used some anti-sandbox techniques as well. For some more information about the CVE, please see the following links: https://researchcenter.paloaltonetworks.com/2017/12/unit42-analysis-of-cve-2017-11882-exploit-in-the-wild/ http://reversingminds-blog.logdown.com/posts/3907313-fileless-attack-in-word-without-macros-cve-2017-11882 2018-02-17 REMCOS…