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Updated: 2 hours 59 min ago

Finding VBA signatures in .docm files, (Sun, Feb 18th)

Sun, 02/18/2018 - 2:58pm
Last week I researched how to detect signed VBA code in Word .doc files.

Malware Delivered via Windows Installer Files, (Sat, Feb 17th)

Sat, 02/17/2018 - 2:06am
For some days, I collected a few samples of malicious MSI files. MSI files are Windows installer files that users can execute to install software on a Microsoft Windows system. Of course, you can replace “software” with “malware”. MSI files look less suspicious and they could bypass simple filters based on file extensions like “(com|exe|dll|js|vbs|…)”. They also look less dangerous because they are Composite Document Files:

February 2018 Microsoft (and Adobe) Patch Tuesday , (Tue, Feb 13th)

Tue, 02/13/2018 - 4:47pm
I will update this diary as additional bulletins are released. Microsoft marked adobe's bulletin as "not yet exploited". However, according to Adobe and reports from the Korean Cert, one of the vulnerabilities has already been exploited, so I am marking it differently here, and assign it a "Patch Now" rating. Not much detail has been made public yet about this vulnerability, which is why I am leaving the "Disclosed" rating at "No".

Analyzing compressed shellcode, (Mon, Feb 12th)

Mon, 02/12/2018 - 12:06am
I received a malicious RTF file with several stages (PowerShell commands), containing Gzip compressed shellcode.

Finding VBA signatures in Word documents, (Sun, Feb 11th)

Sun, 02/11/2018 - 2:49pm
One of my former students contacted me after reading my last diary entry "An autograph from the Dridex gang" with a question: how to detect Word documents with signed VBA code?

Increase in port 2580 probe sources, (Fri, Feb 9th)

Sat, 02/10/2018 - 6:56am
Reviewing the dashboards at the ISC today revealed an anomaly on port 2580.  Over the last couple days the number of sources probing for port 2580 has increased by nearly 600x from near none historically. 

An autograph from the Dridex gang, (Fri, Feb 9th)

Fri, 02/09/2018 - 11:26am
Reader Wayne Smith submitted a PDF file attached to a malicious email.

SQL injection and division by zero exceptions, (Thu, Feb 8th)

Thu, 02/08/2018 - 5:32am
SQL injections are my favorite vulnerabilities. Of course, every penetration tester loves them since they are (in most cases) critical, however what I like with them is that there are so many ways to exploit even the apparently-looking remote or unexploitable cases.

GandCrab Ransomware: Now Coming From Malspam, (Wed, Feb 7th)

Wed, 02/07/2018 - 5:04pm