I published the following diary on isc.sans.edu: “Nicely Obfuscated Python RAT“: While hunting, I found an interesting Python script. It matched one of my YARA rules due to the interesting list of imports but the content itself was nicely obfuscated. The script SHA256 hash is c5c8b428060bcacf2f654d1b4d9d062dfeb98294cad4e12204ee4aa6e2c93a0b and the current VT score
I published the following diary on isc.sans.edu: “Analysis of a Phishing Kit“: Sometimes, attackers make mistakes and allow security researchers to access interesting resources. This time, it’s another phishing kit that was left in the wild on the compromised server. The file is called ‘2019Amex.zip’ (SHA256:269ab3970ef8997a61b1b14eebe5a2beb1348b2dcc5358ccd4314ad19a41daf5)… [Read more]
I published the following diary on isc.sans.edu: “Managing Remote Access for Partners & Contractors“: Yesterday, I wrote a quick diary about a potential security issue that some Tyler customers faced. Some people reacted to my diary with interesting comments in our forums. Two of them were interesting and deserve some
I published the following diary on isc.sans.edu: “PowerShell Backdoor Launched from a ShellCode“: When you need to perform malicious actions on a victim’s computer, the Internet is full of resources that can be reused, forked, slightly changed to meet your requirements. After all, why reinvent the wheel if some pieces
I published the following diary on isc.sans.edu: “Party in Ibiza with PowerShell“: Today, I would like to talk about PowerShell ISE or “Integration Scripting Environment”. This tool is installed by default on all Windows computers (besides the classic PowerShell interpreter). From a malware analysis point of view, ISE offers a key feature:
I published the following diary on isc.sans.edu: “Malicious Word Document with Dynamic Content“: Here is another malicious Word document that I spotted while hunting. “Another one?” may ask some of our readers. Indeed but malicious documents remain a very common infection vector and you learn a lot when you analyze
I published the following diary on isc.sans.edu: “A Mix of Python & VBA in a Malicious Word Document“: A few days ago, Didier wrote an interesting diary about embedded objects into an Office document. I had a discussion about an interesting OLE file that I found. Because it used the same
I published the following diary on isc.sans.edu: “Suspicious Endpoint Containment with OSSEC“: When a host is compromised/infected on your network, an important step in the Incident Handling process is the “containment” to prevent further infections. To place the device into a restricted environment is definitively better than powering off the system
I published the following diary on isc.sans.edu: “Sandbox Evasion Using NTP“: I’m still hunting for interesting (read: “malicious”) Python samples. By reading my previous diaries, you know that I like to find how attackers implement obfuscation and evasion techniques. Like yesterday, I found a Python sample that creates a thread
I published the following diary on isc.sans.edu: “Python and Risky Windows API Calls“: The Windows API is full of calls that are usually good indicators to guess the behavior of a script. In a previous diary, I wrote about some examples of “API call groups” that are clearly used together
