![\"expired1\"](\"https:\/\/www.hexacorn.com\/blog\/wp-content\/uploads\/2015\/09\/expired1.png\")
<\/a><\/p>\nThe missing component scenario is also very common. While Visual Basic and Borland C are no longer that popular, \u00a0there are lots of old samples out there\u00a0belonging to a\u00a0software written in these old programming platforms. Sandbox should be expecting these in a queue…<\/p>\n Again, a few examples:<\/p>\n Large repositories of samples can’t escape\u00a0programs written for localized\u00a0versions of Windows.\u00a0Running such applications on English OS\u00a0leads to ‘garbage’ message boxes showing up with lots of gibberish that have no particular meaning and it’s hard to deduct what they mean, until\u00a0analyzed.<\/p>\n Here is an example of such message box:<\/p>\n It turns out that it’s not a crash – just a message telling the user:<\/p>\n which – after Google translation – says:<\/p>\n I don’t speak Korean, but guessing by the GT output\u00a0I assume it is just a notification the program will kill all (Internet) Explorer windows before it can remove some app. Whatever is the meaning – one has to ensure it is analyzed\u00a0so that\u00a0the sample (and potentially similar) actually works properly.<\/p>\n Many samples crash – this is overwhelming and I think the only way to handle this is to signal in the report that the app has crashed. Again, not a trivial problem to solve.\u00a0You may detect Dr Watson launch, .NET crashes, or other default crash windows popping up, but you can’t expect them all the time – many frameworks handle crashes gracefully and as such, sandbox needs to recognize these properly. There are also \u00a0samples I came across that don’t even indicate the crash – one needs to recognize it from the flow of the code execution i.e. program’s business logic following the ‘something is wrong’ path\u00a0(f.ex. some installers do it).<\/p>\n If you think a crash detection would require a quick regexp on\u00a0a couple of commonly used ‘crashing’ words (‘error’, ‘crash’, ‘corrupt’, etc.) \u00a0– think again – here are some examples of such messages, and in reality there are hundreds, if no more variants:<\/p>\n Last, but not least – some malware intentionally shows fake message boxes. They may contain misleading information and may confuse naive engines looking for specific keywords or even phrases – relying on the messages alone is not enough to make the final call.<\/p>\n Yup, sandboxing can be preceived\u00a0as\u00a0pretty hopeless \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":" Running programs and expecting them to behave is nothing, but a\u00a0wishful thinking. When you start processing thousands of files you quickly\u00a0discover that the reality of automated dynamic software analysis is quite harsh. Component and software dependencies, missing command line arguments, … Continue reading <\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n\n
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