Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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Method for Identifying and Removing Malicious Software
The current application is a Patent Cooperation Treaty (PCT) application and
claims a priority to a U.S. provisional application serial number 62/350,963
filed on June
16, 2016.
FIELD OF THE INVENTION
The present invention relates generally to a method of protecting a user's web
browser from undesired add-ons and extensions. More specifically, the present
invention
identifies and disables malicious programs, files, and browser extensions.
BACKGROUND OF THE INVENTION
Present day, when users install browser add-ons or extensions, hereafter
referred
to as "extensions," this often results in certain settings being changed in a
way that the
user potentially did not want or expect. When settings such as the default
search engine
and new tab page are changed unexpectedly, it is very frustrating and degrades
the
overall experience of browsing the Internet for the user. Additionally, some
browser
extension developers purposefully include these unwanted settings changes,
such as
changing the default search provider, in their extensions. Moreover, these
browser
extensions can exhibit other malicious behaviors such as not functioning as
advertised,
tracking personal information, and installing malware on the user's computer.
It is therefore an objective of the present invention to introduce a method
that
users can utilize to overcome such problems. The present invention is a method
which
monitors and searches for any installation of extensions known to cause
problems. For
example, one possible scenario occurs when the user is surfing for movies and
suddenly
receives a popup that contains what looks like, but is not, a video download
button. If the
user clicks it, the user observes that there is now a toolbar on their browser
which
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changed his/her search settings, etc. unexpectedly. The present invention is
notable
because it checks for such problems at the moment of installation. There are
extensions
out there that remove all extensions on the user's computer. However, this
method is
often considered excessive.
The present invention is a browser extension that resides on the user's PC and
monitors other extensions. When an extension that exhibits
unwanted/undesirable
behavior is installed, it will be disabled and/or uninstalled by the
monitoring extension.
In contrast to a delete-all, blanket approach often utilized by the prior art,
the
present invention instead checks the extensions against a database and removes
the
known bad actors. The present invention takes a list of all the browser
extension IDs on
the user's computer, and sends it over to the remote server. The server checks
to see if
any of those IDs are known bad actors. It will return the list of matches and
dispose of
them.
Alternatively, instead of disabling or uninstalling an undesired extension
automatically, the present invention can prompt the user to remove or de-
activate the
offending extension manually. The monitoring extension performs this check for
extensions that are potentially undesirable. Checks will occur periodically
and at other
certain points in the extension's lifecycle. This is a more customized
solution, compared
to the prior art. It is more surgical, and not a blanket solution prone to
excess.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram illustrating the communication between the
components of the
system required to execute the method of the present invention.
FIG. 2 is a flowchart illustrating the overall method of the present
invention.
FIG. 3 is a flowchart illustrating the sub-process for selecting one or more
personal files
to be scanned for malicious code using the present invention.
FIG. 4 is a flowchart illustrating the sub-process for scanning newly
downloaded files
using the present invention.
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FIG. 5 is a flowchart illustrating the sub-process for initiating a periodic
scan using the
present invention.
FIG. 6 is a flowchart illustrating the sub-process for performing the
sandboxed-evaluation
process using the present invention.
FIG. 7 is a flowchart illustrating the sub-process for performing the threat
remediation
process using the present invention.
FIG. 8 is a flowchart illustrating the sub-process for selecting and executing
a delete
command for the threat remediation process using the present invention.
FIG. 9 is a flowchart illustrating the sub-process for selecting and executing
a quarantine
command for the threat remediation process using the present invention.
FIG. 10 is a flowchart illustrating the sub-process for distributing targeted
advertisements
using the present invention.
DETAIL DESCRIPTIONS OF THE INVENTION
All illustrations of the drawings are for the purpose of describing selected
versions of the present invention and are not intended to limit the scope of
the present
invention.
As can be seen in FIG. 1 through FIG. 10, the present invention, the method
for
identifying and removing malicious software, is a method for keeping a user's
computing
device free of malicious files including, but not limited to, documents,
programs, and
browser extensions. The present invention makes use of an automated scanning
function
and a manual scanning function to identify and disable malicious files on the
user's
computing device. The term malicious files is used herein to refer to
malicious code or
viruses. Specifically, the present invention can operate as a real-time
scanning system
that identifies malicious files as they are downloaded or installed onto the
user's
computing device. Additionally, the present invention can operate as a manual
or periodic
scanning system that either performs a scan when directed, or performs the
scan on a
fixed schedule. The scanning function of the present invention is designed to
identify
malicious files by comparing the files to a blacklist. Additionally, the
present invention
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makes use of a sandboxing system that tests files to determine whether or not
the files are
malicious. Another aspect of the present invention recommends programs and
services
that the user may find useful.
As can be seen in FIG. 2, to achieve the above described functionality, the
overall
method of the present invention makes use of a system that provides a personal
computing (PC) device communicably coupled to at least one remote server (Step
A).
The PC devices used to interact with the present invention can be, but is not
limited to, a
smart-phone, a laptop, a desktop, or a tablet PC. The remote server is used to
execute a
number of internal processes for the present invention and to communicate
malicious
code information to the PC device. The PC device contains a plurality of
personal files,
each of which is associated with a corresponding program identifier (PID). The
plurality
of personal files is a collection of documents, programs, and program
extensions that are
stored on the user's PC device. Additionally, the PID is the identifier that
the present
invention uses to differentiate between each of the plurality of personal
files. The overall
method of the present invention also provides a blacklist and a whitelist that
are managed
by the remote server (Step B). The blacklist is a list of PIDs that are
associated with
personal files which are known to contain malicious code. Conversely, the
whitelist is a
list of PIDs that are associated with personal files which are known to be
free of
malicious code. The PC device, the remote server, the blacklist, and the
whitelist are the
elements of the system that are required to execute the method of the present
invention.
As can be seen in FIG. 2, once the above described system elements are
provided,
the overall method of the present invention continues by receiving a scan
request for at
least one specific file with the PC device (Step C). The scan request is a
command that
directs the method of the present invention to initiate a malicious code scan
of the PC
device. The at least one specific file is the file that will be scanned for
malicious code.
Specifically, the at least one specific file is one or more personal files
that the method of
the present invention will scan for malicious code. The overall method of the
present
invention continues by executing a sandboxed-evaluation process for the
specific file
with the remote server in order to append the corresponding PID of the
specific file to
either the blacklist or the whitelist, if the corresponding PID for the
specific file is not on
either the blacklist or the whitelist (Step D). The sandboxed-evaluation
process is a sub-
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process of the overall method of the present invention that determines if the
specific file
contains malicious code. If the specific file is determined to contain
malicious code, then
the corresponding PID is added to the blacklist. Conversely, if the specific
file is found to
be without malicious code, then the corresponding PID is added to the
whitelist.
Furthermore, this sandboxed-evaluation process is executed on an isolated
virtual
machine that prevents the malicious code from negatively affecting the PC
device or the
remote server. The overall method of the present invention continues by
executing a
threat remediation process for the specific file with the remote server, if
the
corresponding PID for the specific file is on the blacklist (Step E). The
threat remediation
process is a sub-process that is used to remove or disable a personal file
that is found to
contain malicious code.
As can be seen in FIG. 3, the present invention is designed to give the user
multiple options as to what personal files should be scanned and when the
scanning
should occur. To that end, the present invention includes a sub-process that
enables the
user to select at least one file that should be scanned. As such, the sub-
process begins by
prompting to select at least one desired file from the plurality of personal
files with the
PC device. The at least one desired file is one or more personal files that
the user would
like to have scanned for malicious code. The sub-process continues by
designating the at
least one desired file as the at least one specific file with the PC device
before Step C.
This step prepares the method of the present invention to scan the desired
file for
malicious code. Additionally, this sub-process enables the user to manually
initiate a
malicious code scan on one or more personal files.
As can be seen in FIG. 4, a separate sub-process of the method of the present
invention is used to automatically initiate a scan every time the user
downloads a new
file. This sub-process begins when the user completes downloading a new file
onto the
PC device. The sub-process continues by appending the new file into the
plurality of
personal files with the PC device. Once the user has downloaded the new file,
the sub-
process is initiated and the new file is added to the plurality of personal
files. As such, the
new file can be scanned for malicious code. Specifically, the sub-process
continues by
designating the new file as the at least one specific file with the PC device
before Step C.
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This step prepares the method of the present invention to scan the new file
for malicious
code.
As can be seen in FIG. 5, another separate sub-process of the overall method
of
the present invention is used to execute periodic scans of the plurality of
personal files
stored on the user's PC device. To accomplish this the sub-process begins by
prompting
to select a time interval for the plurality of personal files with the PC
device. The time
interval is the length of time that will elapse between automated scans of the
user's PC
device. For example, if the user selects a twelve-hour time interval then the
system will
execute a scan of the plurality of personal files stored on the user's PC
device every
twelve hours. Alternatively, the present invention can be used with a preset
time interval
that the user does not control. The sub-process continues by designating all
of the
plurality of personal files as the at least one specific file with the PC
device before Step
C. This directs the method of the present invention to scan all of the
personal files that
are available on the user's PC device. Finally, the sub-process continues by
periodically
executing Step C through Step E at the time interval. This step initializes
the periodic
scan that occurs whenever the time interval has elapsed.
As can be seen in FIG. 6, the present invention is designed with a sub-process
that
is used to determine if an unrecognized personal file contains malicious code.
Additionally, the present invention is designed to perform this
characterization in real-
time and on demand. This sub-process is initiated when the corresponding PID
of the
specific file is not on either the blacklist or the whitelist (Step F). If the
PID of the
specific file is not found in the blacklist or the whitelist, then the method
of the present
invention designates the specific file as an unrecognized file. The sandboxed-
evaluation
process is designed to identify malicious code within any unrecognized file.
Additionally,
the sandboxed-evaluation process can be set to periodically check the programs
on the
black list and the whitelist for malicious code. This functionality maintains
the integrity
of the blacklist and the whitelist even as programs are updated. The sub-
process
continues by generating a sandboxed virtual machine with the remote server
(Step G).
The sandboxed virtual machine is an isolated virtualized environment that the
remote
server creates to test the unrecognized file. The sub-process continues by
installing a
virtual copy of the specific file on to the sandboxed virtual machine with the
remote
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server (Step H). Likewise, the virtual copy is a copy of the unrecognized file
that is safely
installed onto the sandboxed virtual machine. Once installed the virtual copy
can be
manipulated by the processes of the remote server without damaging the PC
device or the
remote server. As such, the sub-process continues by performing a malicious-
code scan
on the virtual copy of the specific file with the remote server in order to
detect malicious
code on the virtual copy of the specific file (Step I). The malicious-code
scan is a routine
that tests the virtual copy to determine if any included code can be
classified as
malicious. Specifically, the malicious-code scan determines if the specific
file that was
used to create the virtual copy poses a threat to the user's PC device.
Additionally, the
malicious code scan determines if the specific file exhibits unauthorized
behaviors
including, but not limited to, tracking the user's web browsing, reporting
personal
information, or otherwise impinging on the user's privacy. In this way, the
sandboxed-
evaluation process protects the user's privacy and personal information. The
sub-process
continues by appending the correspond PID of the specific file onto the
blacklist with the
remote server, if the malicious-code scan does detect malicious code on the
virtual copy
of the specific file (Step J). The sub-process us used to automatically update
the blacklist
with the PID of the specific file that was found to contain malicious code.
Similarly, the
sub-process continues by appending the correspond PID of the specific file
onto the
whitelist with the remote server, if the malicious-code scan does not detect
malicious
code on the virtual copy of the specific file during Step D (Step K). As a
result, the sub-
process automatically updates the blacklist and the whitelist with PIDs that
were once
unknown. In this way, the present invention becomes better at recognizing
threats as time
goes on.
As can be seen in FIG. 7, FIG. 8, and FIG. 9, after the specific file has been
compared to the blacklist or run through the sandboxed-evaluation process, the
specific
file's corresponding PID will wither be on the black list or on the white
list. If the
specific file's corresponding PID is found on the blacklist, the method of the
present
invention initiates the threat remediation process. The threat remediation
process begins
by providing a plurality of remediation commands for the threat-remediation
process
(Step L). The plurality of remediation commands is a collection of commands
that
instruct the method of the present invention how deal with malicious pieces of
code.
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Additionally, the plurality of remediation commands is stored on the remote
server and
transmitted to the PC device once the threat remediation process is initiated.
The sub-
process continues by prompting to select a desired command for the specific
file with the
PC device (Step M). The desired command is any one of the plurality of
remediation
commands that the user would like to execute. This gives the user the choice
of how to
deal with a personal file that contains malicious code. Once the user has made
a selection,
the sub-process continues by executing the desired command for the specific
file with the
PC device during Step E (Step N). The sub-process then performs the user's
desired
command and the threat remediation is complete. Similarly, the threat
remediation
process can be automated. That is, the user selects a desired command from the
plurality
of remediation commands only once. Afterward, all threat remediation processes
would
automatically implement this remediation command. In one eventuality, the user
would
like to delete the personal file found to contain malicious code. In this
instance, the user
selects the desired command as a delete command. Additionally, the threat
remediation
command can be preset and the user is never given the option to select a
desired
command. The sub-process then continues by uninstalling the specific file off
the PC
device during step N. Uninstalling the specific file removes the file from the
user's PC
device and therefore shields the user from harm. In a second eventuality, the
user would
like to quarantine the personal file found to contain malicious code. In this
instance, the
user selects the desired command as a quarantine command. The sub-process then
continues by disabling the specific file on the PC device during step N.
Disabling the
specific file does not remove the file from the user's PC device. However, the
specific
file is disabled and the user is shielded from harm.
As can be seen in FIG. 10, in addition to identifying malicious code, the
present
invention is designed to suggest products and services that would benefit the
user. To
accomplish this, the method of the present invention employs a sub-process for
distributing advertisements to the user. The sub-process begins by providing a
plurality of
advertisements stored on the remote server. The plurality of advertisements is
a collection
of promotional notifications that include pictures, videos, hyperlinks, and
written
information about specific products and services. The sub-process continues by
retrieving
at least one contextual identifier for each of the plurality of personal files
with the remote
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server. The contextual identifier is a piece of metadata that is associated
with each of the
plurality of personal files. The sub-process continues by compiling the at
least one
contextual identifier for each of the plurality of personal files into a user
summarization
profile with the remote server. The summarization profile is created from an
analysis of
the contextual identifiers that are associated with each of the plurality of
personal files.
This step turns the disparate pieces of metadata into a profile of the user
which reveals
what types of products and services would best serve the user. The
summarization profile
may also include information from the user's web browsing history, and tasks
that are
frequently performed with the PC device. The sub-process continues by
comparing the
user summarization profile to each of the plurality of advertisements in order
to identify
at least one matching advertisement from the plurality of advertisements. The
at least one
matching advertisement is one or more of the advertisements that are stored in
the remote
server. The sub-process constructs a virtual profile of the user and then
finds
advertisements to which the user is most likely to be receptive. The sub-
process continues
by displaying the at least one matching advertisement with the PC device after
Step E.
The user is then presented with the matching advertisement in a format that
can be easily
interacted with. The method of the present invention preferably tracks if the
user interacts
with the matching advertisement. As a result, the method of the present
invention can
form longitudinal studies of the user's behavior and improve the summarization
profile.
Although the invention has been explained in relation to its preferred
embodiment, it is to be understood that many other possible modifications and
variations
can be made without departing from the spirit and scope of the invention as
hereinafter
claimed.
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