I published the following diary on isc.sans.edu: “Who Are Those Bots?“: I’m operating a mail server for multiple domains. This server is regularly targeted by bots that launch brute-force attacks to try to steal credentials. They try a list of common usernames but they also try targeted ones based on
I published the following diary on isc.sans.edu: “CinaRAT Delivered Through HTML ID Attributes“: A few days ago, I wrote a diary about a malicious ISO file being dropped via a simple HTML file. I found another sample that again drops a malicious ISO file but this time, it is much
I published the following diary on isc.sans.edu: “Obscure Wininet.dll Feature?“: The Internet Storm Center relies on a group of Handlers who are volunteers and offer some free time to the community besides our daily job. Sometimes, we share information between us about an incident or a problem that we are facing and
I published the following diary on isc.sans.edu: “RedLine Stealer Delivered Through FTP“: Here is a piece of malicious Python script that injects a RedLine stealer into its own process. Process injection is a common attacker’s technique these days (for a long time already). The difference, in this case, is that
I published the following diary on isc.sans.edu: “Custom Python RAT Builder“: This week I already wrote a diary about “code reuse” in the malware landscape but attackers also have plenty of tools to generate new samples on the fly. When you received a malicious Word documents, it has not been
I published the following diary on isc.sans.edu: “Malicious Python Script Targeting Chinese People“: This week I found a lot of interesting scripts as this is my fourth diary in a row! I spotted a Python script that targets Chinese people. The script has a very low VT score (2/56) (SHA256:aaec7f4829445c89237694a654a731ee5a52fae9486b1d2bce5767d1ec30c7fb).
I published the following diary on isc.sans.edu: “Code Reuse In the Malware Landscape“: Code re-use is classic behavior for many developers and this looks legit: Why reinvent the wheel if you can find some pieces of code that do what you are trying to achieve? If you publish a nice
I published the following diary on isc.sans.edu: “A Simple Batch File That Blocks People“: I found another script that performs malicious actions. It’s a simple batch file (.bat) that is not obfuscated but it has a very low VT score (1/53). The file hash is cc8ae359b629bc40ec6151ddffae21ec8cbfbcf7ca7bda9b3d9687ca05b1d584. The file is detected by
I published the following diary on isc.sans.edu: “McAfee Phishing Campaign with a Nice Fake Scan“: I spotted this interesting phishing campaign that (ab)uses the McAfee antivirus to make people scared. It starts with a classic email that notifies the targeted user that a McAfee subscription expired… [Read more]
Velociraptor is a great DFIR tool that becomes more and more popular amongst Incident Handlers. Velociraptor works with agents that are deployed on endpoints. Once installed, the agent automatically “phones home” and keep s a connection with the server… exactly like a malware with it’s C2 server but this time
