Penetration Testing with Kali Linux
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illustrated in each screenshot. A screenshot that contains two pieces
of pertinent information
does not lend itself to being easily understood at a glance. We must also ensure the impact is
framed properly in the screenshot. Having the target of the screenshot off-center at the side
obfuscates the intent as well. Finally, the caption for the screenshot shouldn’t be overly long.
Figure 12: Bad Screenshot
The screenshot above covers the important information with an irrelevant piece of information,
which prevents the full impact of the screenshot from being understood by the reader.
To recap, a good screenshot has the following characteristics:
•
is legible
•
contains some visual indication that it applies to the client
•
contains the material that is being described
•
supports the description of the material
•
properly frames the material being described
On the other hand, a bad screenshot is one that:
•
is illegible
•
is generic rather
than client-specific
•
contains obfuscated or irrelevant information
•
is improperly framed
Under the screenshot, we include a caption. A caption is not meant to provide additional context
for the picture. A caption is there to describe the picture in a few words. Any additional context
that is necessary can be provided in a separate paragraph. In most cases, eight to ten words is an
appropriate maximum for a caption.
5.1.6
Tools to Take Screenshots
We can take screenshots using native operating system capabilities. Windows, Linux, and macOS
all provide tools to take screenshots. We can also use special-purpose tools.
Penetration Testing with Kali Linux
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For Windows, the PrintScreen key allows us to take a copy of the full screen, and
Alt/PrtSc
takes a
screenshot of the currently active window. This can then be pasted into a Paint, Word, or
PowerPoint document and manipulated as required. We’ll often want to crop the image to remove
any unwanted material, and we can do that in these applications.
We
can also invoke the Windows
Snipping Tool
205
by pressing the Windows key together with
Shift/S.
Figure 13: Snipping Tool
The Snipping tool allows us to highlight and take a screenshot of
any area of the screen we
choose.
MacOS provides the capability to take a screenshot using the keyboard Shift/Command
combination with the numeric keys 3, 4, or 5 key. To select and save the entire screen, we can use
F
+
B
+
3
. To highlight and select a specific area on the screen,
we can simply use
F
+
B
+
4
or
F
+
B
+
5
.
We can take a screenshot in Linux using the PrintScreen key. This will capture and save the entire
screen to the user’s Images/ directory.
B
+PrintScreen will allow for area highlighting and
selection.
In Kali Linux, we can also use the
Screenshot
tool which
is installed by default and
comes with many options such as choosing the active window, selecting a region, adding a delay
before taking the actual screenshot, etc.
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