INTERNET STORM CENTER SPOTLIGHT
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Apple Updates Everything (again)
Published: 2023-07-24
Last Updated: 2023-07-24 18:18:56 UTC
by Johannes Ullrich (Version: 1)
Apple released one of its usual "step" upgrades for its operating systems. This covers iOS, iPadOS, macOS, tvOS and watchOS. The update also includes the vulnerability patched in the last rapid security response update.
Our "ChatGPT CVSS calculator" didn't work well this time. I still left the scores in, but if you see "0", "?" or "unknown,": This means ChatGPT didn't respond with a CVSS score.
Read the complete entry:
https://isc.sans.edu/diary/Apple+Updates+Everything+again/30062/
Deobfuscation of Malware Delivered Through a .bat File
Published: 2023-07-20
Last Updated: 2023-07-20 06:57:58 UTC
by Xavier Mertens (Version: 1)
I found a phishing email that delivered a RAR archive (password protected). Inside the archive, there was a simple .bat file (SHA256: 57ebd5a707eb69dd719d461e1fbd14f98a42c6c3dcb8505e4669c55762810e70) with the following name: SRI DISTRITAL - DPTO DE COBRO -SRI Informa-Deuda pendiente.bat. Its current VT score is only 1/59!
Let’s have a look at this file! After the classic “@echo off”, there is a very long line that looks like a payload, it starts with “::”, a comment in .bat files (a common alternative to the REM command)...
Read the complete entry:
https://isc.sans.edu/diary/Deobfuscation+of+Malware+Delivered+Through+a+bat+File/30048/
Suspicious IP Addresses Avoided by Malware Samples
Published: 2023-07-26
Last Updated: 2023-07-26 05:49:03 UTC
by Xavier Mertens (Version: 1)
Modern malware samples implement a lot of anti-debugging and anti-analysis techniques. The idea is to slow down the malware analyst's job or, more simply, to bypass security solutions like sandboxes. These days, I see more and more malware samples written in Python that have these built-in capabilities. One of them is the detection of “suspicious” IP addresses.
The last one I found has the SHA256 9d4d651095f9e03a0321def2dc47252ed22334664218f3df9e2f3dbbf99cdc1b with a VT score of 8/57.
Read the complete entry:
https://isc.sans.edu/diary/Suspicious+IP+Addresses+Avoided+by+Malware+Samples/30068/