Why does findstr not extract the PowerShell command with "findstr dikona" from the. lnk file is not know by the initial PowerShell script, all. lnk file, findstr (grep) is used to select all lines with string dikona. To easily extract the script from the (binary). lnk file itself has a detection rate of 2/59 on VirusTotal (time of writing). lnk file, is very short and looks benign: it will not trigger many AV programs. The PowerShell command (with findstr dikona) that is executed by the. lnk file according to the format specification for. lnk file, and will not be found by just analyzing the content of the. The malicious PowerShell script is appended to the. This script, extracted via findstr, is stored into variable $g, and then executed.Ĭonclusion: this is a trick to evade AV detection. It's because the PowerShells script is just appended to the end of the. lnk file, the analysis report of lnkanalyser does not reveal this script: Where is this script stored? Not inside a valid field inside the. Notice that all lines in this script contain the string dikona. This is another PowerShell script (a downloader). Let's try this findstr command on the malicious. And $env:userprofile\*.lnk directs findstr to grep through all. Option /s directs findstr to search in all subdirectories. Matt figured out that it launches the following PowerShell command:Ĭommand findstr is Windows' grep command.
#Grep for windows 10 findstr zip file#
The same way you can add more parameters or make more complex commands.Reader Matt was targeted with malware via email, and managed to start to analyze the content of the ZIP file served by the compromised server. Grepprg=grep -nR $* /dev/null # <- on Linux
#Grep for windows 10 findstr windows#
So in order to use recursive search you have to modify grepprg and add a proper parameter: grepprg=findstr /S /n # <- on Windows Grepprg=grep -n $* /dev/null # <- on Linux Depending on your operating system you will have different results: grepprg=findstr /n # <- on Windows This is a variable that controls the usage of external grep tool in VIM. But first you neeed to know one thing: :set grepprg However you can still make it the default behaviour in VIM. This will work on Windows and will find all “MyMethod” phrases in all files in all subdirectories of current working directory. You can pass it like that: :grep /S MyMethod *.* In order to make it work on Windows you would need to use /S parameter (linux grep also accepts -R parameter which does the same thing). However this works for :vimgrep and :grep in linux, but does not work for Windows. In order to search in subdirectories you would have to use **/*.* pattern. By default it does not perform recursive search (it will not search in subdirectories). Will look for phrase “MyMethod” in all files in current workind directory (you can check currect directory using :pwd). The syntax is as follows: :grep searchpattern locationpattern I guess you have to choose yourself which command you like most.
Location window will show in the same way, but if you select anything then the window will disappear and you will have to run :lopen again. In practise the difference is that if you use Quickfix window (:copen) it will stick to the current editor. :lgrep/:lvimgrep will do the same, but using location list (opened with :lopen). Search result is presented using Quickfix window (opened with :copen). On the other hand vimgrep has the same syntax everywhere (:grep depends on external tool used). :vimgrep will use built-in vim search (same as for “/” searching) which is slower than system search (but works if you have problems with grep/findstr/other). :grep will use the default “find” tool for your operating system (“grep” for linux family, “findstr” for Windows).
You can use four commands: :grep, :lgrep, :vimgrep, :lvimgrep. It’s not a surprise that there is a built-in way to find in files in VIM.
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