Introduction Today we will take a first look at malware-based attacks on ATMs in general, while future articles will go into more detail on the individual subtopics. ATMs have been robbed by criminal gangs around the world for decades. A successful approach since ~ 20 years is the use of highly flammable gas, which is … Continue reading Malware-based attacks on ATMs – A summary
The MS Office DDE YARA rules that we published yesterday detected several malicious documents samples since 10/10/2017. Remark: the malicious samples we mention were detected with our DDEAUTO rule (Office_DDEAUTO_field); as we feared, the second rule (Office_DDE_field) is generating some false positives and we will update it. The first sample uses PowerShell to download an executable and run … Continue reading YARA DDE rules: DDE Command Execution observed in-the-wild
Dynamic Data Exchange is an old Microsoft technology that can be (ab)used to execute code from within MS Office documents. Etienne Stalmans and Saif El-Sherei from Sensepost published a blog post in which they describe how to weaponize MS Office documents. We wrote 2 YARA rules to detect this in Office Open XML files (like .docx): … Continue reading Detecting DDE in MS Office documents
The Samba Team disclosed vulnerability CVE-2017-7494: Remote code execution from a writable share. HD Moore reported that the vulnerability is simple to exploit: on an open, writable SMB share, a shared library has to be uploaded which can then be easily executed on that server. The Samba Team has released patches and new versions (the vulnerability … Continue reading Critical Samba vulnerability CVE-2017-7494 – Impact on Belgium
There is a new exploit (CVE-2017-0199) going around for which a patch was released by Microsoft on 11/04/2017. In this post, we analyze an RTF document exploiting this vulnerability and provide a YARA rule for detection. rtfdump.py is a Python tool to analyze RTF documents. Running it on our sample produces a list with all "entities" … Continue reading Analysis of a CVE-2017-0199 Malicious RTF Document
A serious problem in the Linux glibc library went unnoticed for almost 15 years. A simple coding mistake introduced into the code in November 2000 leaves servers including e-mail servers vulnerable to remote code execution. A buffer overflow in the GNU C Library function __nss_hostname_digits_dots(), which is called by the well used gethostbyname*() functions makes … Continue reading The GHOST vulnerability
