I published the following diary on isc.sans.org: “Using Bad Material for the Good“: There is a huge amount of information shared online by attackers. Once again, pastebin.com is a nice place to start hunting. As this material is available for free, why not use it for the good? Attackers (with
I published the following diary on isc.sans.org: “Phishing Kit (Ab)Using Cloud Services“: When you build a phishing kit, they are several critical points to address. You must generate a nice-looking page which will match as close as possible to the original one and you must work stealthily to not be blocked
I published the following diary on isc.sans.org: “Fileless Malicious PowerShell Sample“: Pastebin.com remains one of my favourite place for hunting. I’m searching for juicy content and report finding in a Splunk dashboard: Yesterday, I found an interesting pastie with a simple Windows CMD script… [Read more]
I published the following diary on isc.sans.org: “Proactive Malicious Domain Search“: In a previous diary, I presented a dashboard that I’m using to keep track of the DNS traffic on my networks. Tracking malicious domains is useful but what if you could, in a certain way, “predict†the upcoming domains
I published the following diary on isc.sans.org: “Top-100 Malicious IP STIX Feed“. Yesterday, we were contacted by one of our readers who asked if we provide a STIX feed of our blocked list or top-100 suspicious IP addresses. STIX means “Structured Threat Information eXpression†and enables organizations to share indicator
I published the following diary on isc.sans.org: “Suspicious Domains Tracking Dashboard“. Domain names remain a gold mine to investigate security incidents or to prevent some malicious activity to occur on your network (example by using a DNS firewall). The ISC has also a page dedicated to domain names. But how
I published the following diary on isc.sans.org: “If you want something done right, do it yourself!“. Another day, another malicious document! I like to discover how the bad guys are creative to write new pieces of malicious code. Yesterday, I found another interesting sample. It’s always the same story, a
I published the following diary on isc.sans.org: “Keep An Eye on your Root Certificates“. A few times a year, we can read in the news that a rogue root certificate was installed without the user consent. The latest story that pops up in my mind is the Savitech audio drivers
I published the following diary on isc.sans.org: “Interesting VBA Dropper“. Here is another sample that I found in my spam trap. The technique to infect the victim’s computer is interesting. I captured a mail with a malicious RTF document (SHA256: c247929d3f5c82247db9102d2dec28c27f73dc0824f8b386f92aad1a22fd8edd) that exploits the OLE2Link vulnerability (CVE-2017-0199). Once opened, the
I published the following diary on isc.sans.org: “Simple Analysis of an Obfuscated JAR File“. Yesterday, I found in my spam trap a file named ‘0.19238000 1509447305.zip’ (SHA256: 7bddf3bf47293b4ad8ae64b8b770e0805402b487a4d025e31ef586e9a52add91). The ZIP archive contained a Java archive named ‘0.19238000 1509447305.jar’ (SHA256: b161c7c4b1e6750fce4ed381c0a6a2595a4d20c3b1bdb756a78b78ead0a92ce4). The file had a score of 0/61 in VT and
