SANS ISC

[SANS ISC] Interesting VBA Dropper

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

SANS ISC

[SANS ISC] Simple Analysis of an Obfuscated JAR File

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

SANS ISC

[SANS ISC] Investigating Security Incidents with Passive DNS

I published the following diary on isc.sans.org: “Investigating Security Incidents with Passive DNS“. Sometimes when you need to investigate a security incident or to check for suspicious activity, you become frustrated because the online resource that you’re trying to reach has already been cleaned. We cannot blame system administrators and

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