Spyware
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Spyware (a
Spyware is frequently associated with advertising and involves many of the same issues. Because these behaviors are so common, and can have non-harmful uses, providing a precise definition of spyware is a difficult task.[2]
History
The first recorded use of the term
According to a 2005 study by AOL and the National Cyber-Security Alliance, 61 percent of surveyed users' computers were infected with some form of spyware. 92 percent of surveyed users with spyware reported that they did not know of its presence, and 91 percent reported that they had not given permission for the installation of the spyware.[6] As of 2006[update], spyware has become one of the preeminent security threats to computer systems running Microsoft Windows operating systems. Computers on which Internet Explorer (IE) was the primary browser are particularly vulnerable to such attacks, not only because IE was the most widely used,[7] but also because its tight integration with Windows allows spyware access to crucial parts of the operating system.[7][8]
Before
The Windows Registry contains multiple sections where modification of key values allows software to be executed automatically when the operating system boots. Spyware can exploit this design to circumvent attempts at removal. The spyware typically links itself to each location in the registry that allows execution. Once running, the spyware will periodically check if any of these links are removed. If so, they will be automatically restored. This ensures that the spyware will execute when the operating system is booted, even if some (or most) of the registry links are removed.
Overview
Spyware is mostly classified into four types:
Spyware is mostly used for the stealing information and storing Internet users' movements on the Web and serving up pop-up ads to Internet users.[11] Whenever spyware is used for malicious purposes, its presence is typically hidden from the user and can be difficult to detect. Some spyware, such as keyloggers, may be installed by the owner of a shared, corporate, or public computer intentionally in order to monitor users.
While the term spyware suggests software that monitors a user's computer, the functions of spyware can extend beyond simple monitoring. Spyware can collect almost any type of data, including personal information like
Sometimes, spyware is included along with genuine software, and may come from a malicious website or may have been added to the intentional functionality of genuine software (see the paragraph about
In German-speaking countries, spyware used or made by the government is called govware by computer experts (in common parlance: Regierungstrojaner, literally "Government Trojan"). Govware is typically a trojan horse software used to intercept communications from the target computer. Some countries, like Switzerland and Germany, have a legal framework governing the use of such software.
Use of the term "spyware" has eventually declined as the practice of tracking users has been pushed ever further into the mainstream by major websites and data mining companies; these generally break no known laws and compel users to be tracked, not by fraudulent practices per se, but by the default settings created for users and the language of terms-of-service agreements.
In one documented example, on CBS/CNet News reported, on March 7, 2011, an analysis in The Wall Street Journal revealed the practice of Facebook and other websites of tracking users' browsing activity, which is linked to their identity, far beyond users' visits and activity on the Facebook site itself. The report stated: "Here's how it works. You go to Facebook, you log in, you spend some time there, and then ... you move on without logging out. Let's say the next site you go to is The New York Times. Those buttons, without you clicking on them, have just reported back to Facebook and Twitter that you went there and also your identity within those accounts. Let's say you moved on to something like a site about depression. This one also has a tweet button, a Google widget, and those, too, can report back who you are and that you went there." The Wall Street Journal analysis was researched by Brian Kennish, founder of Disconnect, Inc.[16]
Routes of infection
Spyware does not necessarily spread in the same way as a virus or worm because infected systems generally do not attempt to transmit or copy the software to other computers. Instead, spyware installs itself on a system by deceiving the user or by exploiting software vulnerabilities.
Most spyware is installed without knowledge, or by using deceptive tactics. Spyware may try to deceive users by bundling itself with desirable software. Other common tactics are using a Trojan horse, spy gadgets that look like normal devices but turn out to be something else, such as a USB Keylogger. These devices actually are connected to the device as memory units but are capable of recording each stroke made on the keyboard. Some spyware authors infect a system through security holes in the Web browser or in other software. When the user navigates to a Web page controlled by the spyware author, the page contains code which attacks the browser and forces the download and installation of spyware.
The installation of spyware frequently involves Internet Explorer. Its popularity and history of security issues have made it a frequent target. Its deep integration with the Windows environment make it susceptible to attack into the Windows operating system. Internet Explorer also serves as a point of attachment for spyware in the form of Browser Helper Objects, which modify the browser's behaviour.
Effects and behaviors
This section relies largely or entirely upon a single source.(December 2018) ) |
A spyware rarely operates alone on a computer; an affected machine usually has multiple infections. Users frequently notice unwanted behavior and degradation of system performance. A spyware infestation can create significant unwanted CPU activity, disk usage, and network traffic. Stability issues, such as applications freezing, failure to boot, and system-wide crashes are also common. Usually, this effect is intentional, but may be caused from the malware simply requiring large amounts of computing power, disk space, or network usage. Spyware, which interferes with networking software commonly causes difficulty connecting to the Internet.
In some infections, the spyware is not even evident. Users assume in those situations that the performance issues relate to faulty hardware, Windows installation problems, or another malware infection. Some owners of badly infected systems resort to contacting technical support experts, or even buying a new computer because the existing system "has become too slow". Badly infected systems may require a clean reinstallation of all their software in order to return to full functionality.
Moreover, some types of spyware disable software
A typical Windows user has
Since Windows Vista is, by default, a computer administrator that runs everything under limited user privileges, when a program requires administrative privileges, a User Account Control pop-up will prompt the user to allow or deny the action. This improves on the design used by previous versions of Windows. Spyware is also known as tracking software.
Remedies and prevention
As the spyware threat has evolved, a number of techniques have emerged to counteract it. These include programs designed to remove or block spyware, as well as various user practices which reduce the chance of getting spyware on a system.
Nonetheless, spyware remains a costly problem. When a large number of pieces of spyware have infected a Windows computer, the only remedy may involve backing up user data, and fully reinstalling the operating system. For instance, some spyware cannot be completely removed by Symantec, Microsoft, PC Tools.
Anti-spyware programs
Many programmers and some commercial firms have released products designed to remove or block spyware. Programs such as PC Tools'
Major anti-virus firms such as
Other Anti-spyware tools include FlexiSPY, Mobilespy, mSPY, TheWiSPY, and UMobix.[21]
How anti-spyware software works
Anti-spyware programs can combat spyware in two ways:
- They can provide anti-virus protection: all incoming networkdata is scanned for spyware, and any detected threats are blocked.
- Anti-spyware software programs can be used solely for detection and removal of spyware software that has already been installed into the computer. This kind of anti-spyware can often be set to scan on a regular schedule.
Such programs inspect the contents of the
Like most anti-virus software, many anti-spyware/adware tools require a frequently updated database of threats. As new spyware programs are released, anti-spyware developers discover and evaluate them, adding to the list of known spyware, which allows the software to detect and remove new spyware. As a result, anti-spyware software is of limited usefulness without regular updates. Updates may be installed automatically or manually.
A popular generic spyware removal tool used by those that requires a certain degree of expertise is HijackThis, which scans certain areas of the Windows OS where spyware often resides and presents a list with items to delete manually. As most of the items are legitimate windows files/registry entries it is advised for those who are less knowledgeable on this subject to post a HijackThis log on the numerous antispyware sites and let the experts decide what to delete.
If a spyware program is not blocked and manages to get itself installed, it may resist attempts to terminate or uninstall it. Some programs work in pairs: when an anti-spyware scanner (or the user) terminates one running process, the other one respawns the killed program. Likewise, some spyware will detect attempts to remove registry keys and immediately add them again. Usually, booting the infected computer in safe mode allows an anti-spyware program a better chance of removing persistent spyware. Killing the process tree may also work.
Security practices
To detect spyware, computer users have found several practices useful in addition to installing anti-spyware programs. Many users have installed a
Some
Individual users can also install
Individual users can use cellphone / computer with physical (electric) switch, or isolated electronic switch that disconnects microphone, camera without bypass and keep it in disconnected position where not in use, that limits information that spyware can collect. (Policy recommended by NIST Guidelines for Managing the Security of Mobile Devices, 2013).
Applications
"Stealware" and affiliate fraud
A few spyware vendors, notably
Spyware which attacks affiliate networks places the spyware operator's affiliate tag on the user's activity – replacing any other tag, if there is one. The spyware operator is the only party that gains from this. The user has their choices thwarted, a legitimate affiliate loses revenue, networks' reputations are injured, and vendors are harmed by having to pay out affiliate revenues to an "affiliate" who is not party to a contract.[26] Affiliate fraud is a violation of the terms of service of most affiliate marketing networks. Mobile devices can also be vulnerable to chargeware, which manipulates users into illegitimate mobile charges.
Identity theft and fraud
In one case, spyware has been closely associated with
The Federal Trade Commission estimates that 27.3 million Americans have been victims of identity theft, and that financial losses from identity theft totaled nearly $48 billion for businesses and financial institutions and at least $5 billion in out-of-pocket expenses for individuals.[30]
Digital rights management
Some copy-protection technologies have borrowed from spyware. In 2005,
Like spyware, not only was it difficult to detect and uninstall, it was so poorly written that most efforts to remove it could have rendered computers unable to function.Beginning on April 25, 2006, Microsoft's Windows Genuine Advantage Notifications application[35] was installed on most Windows PCs as a "critical security update". While the main purpose of this deliberately uninstallable application is to ensure the copy of Windows on the machine was lawfully purchased and installed, it also installs software that has been accused of "phoning home" on a daily basis, like spyware.[36][37] It can be removed with the RemoveWGA tool.
Personal relationships
Stalkerware is spyware that has been used to monitor electronic activities of partners in intimate relationships. At least one software package, Loverspy, was specifically marketed for this purpose. Depending on local laws regarding communal/marital property, observing a partner's online activity without their consent may be illegal; the author of Loverspy and several users of the product were indicted in California in 2005 on charges of wiretapping and various computer crimes.[38]
Browser cookies
Anti-spyware programs often report Web advertisers' HTTP cookies, the small text files that track browsing activity, as spyware. While they are not always inherently malicious, many users object to third parties using space on their personal computers for their business purposes, and many anti-spyware programs offer to remove them.[39]
Shameware
Shameware or "accountability software" is a type of spyware that is not hidden from the user, but operates with their knowledge, if not necessarily their consent. Parents, religious leaders or other authority figures may require their children or congregation members to install such software, which is intended to detect the viewing of pornography or other content deemed inappropriate, and to report it to the authority figure, who may then confront the user about it.[40]
Spyware programs
These common spyware programs illustrate the diversity of behaviors found in these attacks. Note that as with computer viruses, researchers give names to spyware programs which may not be used by their creators. Programs may be grouped into "families" based not on shared program code, but on common behaviors, or by "following the money" of apparent financial or business connections. For instance, a number of the spyware programs distributed by
Spyware vendors
Spyware vendors include
Rogue anti-spyware programs
Malicious programmers have released a large number of
The recent[update] proliferation of fake or spoofed antivirus products that bill themselves as antispyware can be troublesome. Users may receive popups prompting them to install them to protect their computer, when it will in fact add spyware. It is recommended that users do not install any freeware claiming to be anti-spyware unless it is verified to be legitimate. Some known offenders include:
- Antivirus 2009
- MacSweeper
- Pest Trap
- PSGuard
- Spy Wiper
- Spydawn
- Spylocked
- Spysheriff
- SpyShredder
- Spyware Quake
- SpywareStrike
- WinAntiVirus Pro 2006
- Windows Police Pro
- WinFixer[46]
- WorldAntiSpy
Fake antivirus products constitute 15 percent of all malware.[47]
On January 26, 2006, Microsoft and the Washington state attorney general filed suit against Secure Computer for its Spyware Cleaner product.[48]
Legal issues
Criminal law
Unauthorized access to a computer is illegal under
Spyware producers argue that, contrary to the users' claims, users do in fact give
Despite the ubiquity of
Some jurisdictions, including the U.S. states of Iowa[52] and Washington,[53] have passed laws criminalizing some forms of spyware. Such laws make it illegal for anyone other than the owner or operator of a computer to install software that alters Web-browser settings, monitors keystrokes, or disables computer-security software.
In the United States, lawmakers introduced a bill in 2005 entitled the Internet Spyware Prevention Act, which would imprison creators of spyware.[54]
Administrative sanctions
US FTC actions
The US
In a second case, brought against CyberSpy Software LLC, the FTC charged that CyberSpy marketed and sold "RemoteSpy" keylogger spyware to clients who would then secretly monitor unsuspecting consumers' computers. According to the FTC, Cyberspy touted RemoteSpy as a "100% undetectable" way to "Spy on Anyone. From Anywhere." The FTC has obtained a temporary order prohibiting the defendants from selling the software and disconnecting from the Internet any of their servers that collect, store, or provide access to information that this software has gathered. The case is still in its preliminary stages. A complaint filed by the Electronic Privacy Information Center (EPIC) brought the RemoteSpy software to the FTC's attention.[57]
Netherlands OPTA
An administrative fine, the first of its kind in Europe, has been issued by the Independent Authority of Posts and Telecommunications (OPTA) from the Netherlands. It applied fines in total value of Euro 1,000,000 for infecting 22 million computers. The spyware concerned is called DollarRevenue. The law articles that have been violated are art. 4.1 of the Decision on universal service providers and on the interests of end users; the fines have been issued based on art. 15.4 taken together with art. 15.10 of the Dutch telecommunications law.[58]
Civil law
Former
The hijacking of Web advertisements has also led to litigation. In June 2002, a number of large Web publishers sued
Courts have not yet had to decide whether advertisers can be held
Libel suits by spyware developers
Litigation has gone both ways. Since "spyware" has become a common
WebcamGate
In the 2010
TheftTrack allowed school district employees to secretly remotely activate the webcam embedded in the student's laptop, above the laptop's screen. That allowed school officials to secretly take photos through the webcam, of whatever was in front of it and in its line of sight, and send the photos to the school's server. The LANrev software disabled the webcams for all other uses (e.g., students were unable to use
See also
- Cuckoo's egg (metaphor)
- Cyber spying
- Employee monitoring software
- Industrial espionage
- Infostealer
- Malware
- Phishing
- Superfish
- Technical support scam
- Microphone blocker
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