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Gpcode
PGPCoder or GPCode is a trojan that encrypts files on the infected computer and then asks for a ransom in order to release these files, a type of behavior dubbed ransomware or cryptovirology. Trojan Once installed on a computer, the trojan creates two registry keys: one to ensure it is run on every system startup, and the second to monitor the progress of the trojan in the infected computer, counting the number of files that have been analyzed by the malicious code. Once it has been run, the trojan embarks on its mission, which is to encrypt, using a digital encryption key, all the files it finds on computer drives with extensions corresponding to those listed in its code. These extensions include .doc, .html, .jpg, .xls, .zip, and .rar. The blackmail is completed with the trojan dropping a text file in each directory, with instructions to the victim of what to do. An email address is supplied through which users are supposed to request for their files to be released after pay ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ransomware (malware)
Ransomware is a type of malware from cryptovirology that threatens to publish the victim's personal data or permanently block access to it unless a ransom is paid off. While some simple ransomware may lock the system without damaging any files, more advanced malware uses a technique called cryptoviral extortion. It encrypts the victim's files, making them inaccessible, and demands a ransom payment to decrypt them. In a properly implemented cryptoviral extortion attack, recovering the files without the decryption key is an intractable problem – and difficult to trace digital currencies such as paysafecard or Bitcoin and other cryptocurrencies are used for the ransoms, making tracing and prosecuting the perpetrators difficult. Ransomware attacks are typically carried out using a Trojan disguised as a legitimate file that the user is tricked into downloading or opening when it arrives as an email attachment. However, one high-profile example, the WannaCry worm, travele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptovirology
Cryptovirology refers to the use of cryptography to devise particularly powerful malware, such as ransomware and asymmetric backdoors. Traditionally, cryptography and its applications are defensive in nature, and provide privacy, authentication, and security to users. Cryptovirology employs a twist on cryptography, showing that it can also be used offensively. It can be used to mount extortion based attacks that cause loss of access to information, loss of confidentiality, and information leakage, tasks which cryptography typically prevents. The field was born with the observation that public-key cryptography can be used to break the symmetry between what an antivirus analyst sees regarding malware and what the attacker sees. The antivirus analyst sees a public key contained in the malware, whereas the attacker sees the public key contained in the malware as well as the corresponding private key (outside the malware) since the attacker created the key pair for the attack. The pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trend Micro
is an American-Japanese multinational cyber security software company with global headquarters in Tokyo, Japan and Irving, Texas, United State.Other regional headquarters and R&D centers are located around East Asia, Southeast Asia, Europe, and North America. The company develops enterprise security software for servers, containers, & cloud computing environments, networks, and end points. Its cloud and virtualization security products provide automated security for customers of VMware, Amazon AWS, Microsoft Azure, and Google Cloud Platform. Eva Chen, who is the founder, currently serves as Trend Micro's chief executive officer, a position she has held since 2005. She succeeded founding CEO Steve Chang, who now serves as chairman. History 1988–1999 The company was founded in 1988 in Los Angeles by Steve Chang, his wife, Jenny Chang, and her sister, Eva Chen (陳怡樺). The company was established with proceeds from Steve Chang's previous sale of a copy protection dongle to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trojan Horse (computing)
In computing, a Trojan horse is any malware that misleads users of its true intent. The term is derived from the Ancient Greek story of the deceptive Trojan Horse that led to the fall of the city of Troy. Trojans generally spread by some form of social engineering; for example, where a user is duped into executing an email attachment disguised to appear innocuous (e.g., a routine form to be filled in), or by clicking on some fake advertisement on social media or anywhere else. Although their payload can be anything, many modern forms act as a backdoor, contacting a controller who can then have unauthorized access to the affected computer. Ransomware attacks are often carried out using a Trojan. Unlike computer viruses and worms, Trojans generally do not attempt to inject themselves into other files or otherwise propagate themselves. Use of the term It's not clear where or when the concept, and this term for it, was first used, but by 1971 the first Unix manual assume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trojan Horse (computing)
In computing, a Trojan horse is any malware that misleads users of its true intent. The term is derived from the Ancient Greek story of the deceptive Trojan Horse that led to the fall of the city of Troy. Trojans generally spread by some form of social engineering; for example, where a user is duped into executing an email attachment disguised to appear innocuous (e.g., a routine form to be filled in), or by clicking on some fake advertisement on social media or anywhere else. Although their payload can be anything, many modern forms act as a backdoor, contacting a controller who can then have unauthorized access to the affected computer. Ransomware attacks are often carried out using a Trojan. Unlike computer viruses and worms, Trojans generally do not attempt to inject themselves into other files or otherwise propagate themselves. Use of the term It's not clear where or when the concept, and this term for it, was first used, but by 1971 the first Unix manual assume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E-gold
e-gold was a digital gold currency operated by Gold & Silver Reserve Inc. (G&SR) that allowed users to open an account on their web site denominated in grams of gold, or other precious metals, and that let users make instant transfers of value ("spends") to other e-gold accounts. The e-gold system was launched in 1996 and had grown to five million accounts by 2009, when transfers were suspended due to legal issues. At its peak in 2006, e-gold was processing more than US$2 billion worth of transactions per year, on a monetary base of 71 million worth of gold (about 3.5 metric tons). e-gold Ltd. was incorporated in Nevis, Saint Kitts and Nevis with operations conducted out of Florida, USA. Beginnings e-gold was founded by oncologist Douglas Jackson and attorney Barry Downey in 1996. The pair originally backed the services accounts with gold coins stored in a bank safe deposit box in Melbourne, Florida. By 1998, G&SR (the system operator) was an Affiliate Member of NACHA and a Fu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liberty Reserve
Liberty Reserve was a Costa Rica-based centralized digital currency service that billed itself as the "oldest, safest and most popular payment processor, serving millions all around a world". The site had over one million users when it was shut down by the United States government. Prosecutors argued that due to lax security, alleged criminal activity largely went undetected, which ultimately led to them seizing the service. In May 2013, Liberty Reserve was shut down by United States federal prosecutors under the Patriot Act after an investigation by authorities across 17 countries. The United States charged founder Arthur Budovsky and six others with money laundering and operating an unlicensed financial transaction company. Liberty Reserve is alleged to have been used to launder more than $6 billion in criminal proceeds during its history. Background Based in San José, Costa Rica, Liberty Reserve was a centralized digital currency service that allowed users to register and tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Undeletion
Undeletion is a feature for restoring computer files which have been removed from a file system by file deletion. Deleted data can be recovered on many file systems, but not all file systems provide an undeletion feature. Recovering data without an undeletion facility is usually called data recovery, rather than undeletion. Undeletion can both help prevent users from accidentally losing data, or can pose a computer security risk, since users may not be aware that deleted files remain accessible. Support Not all file systems or operating systems support undeletion. Undeletion is possible on all FAT file systems, with undeletion utilities provided since MS-DOS 5.0 and DR DOS 6.0 in 1991. It is not supported by most modern UNIX file systems, though AdvFS is a notable exception. The ext2 file system has an add-on program called e2undel which allows file undeletion. The similar ext3 file system does not officially support undeletion, but utilities like ext4magic, extundelete, Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Known-plaintext Attack
The known-plaintext attack (KPA) is an attack model for cryptanalysis where the attacker has access to both the plaintext (called a crib), and its encrypted version (ciphertext). These can be used to reveal further secret information such as secret keys and code books. The term "crib" originated at Bletchley Park, the British World War II decryption operation, where it was defined as: History The usage "crib" was adapted from a slang term referring to cheating (e.g., "I cribbed my answer from your test paper"). A "crib" originally was a literal or interlinear translation of a foreign-language text—usually a Latin or Greek language, Greek text—that students might be assigned to translate from the original language. The idea behind a crib is that cryptologists were looking at incomprehensible ciphertext In cryptography, ciphertext or cyphertext is the result of encryption performed on plaintext using an algorithm, called a cipher. Ciphertext is also known as encrypted o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symmetric-key Algorithm
Symmetric-key algorithms are algorithms for cryptography that use the same cryptographic keys for both the encryption of plaintext and the decryption of ciphertext. The keys may be identical, or there may be a simple transformation to go between the two keys. The keys, in practice, represent a shared secret between two or more parties that can be used to maintain a private information link. The requirement that both parties have access to the secret key is one of the main drawbacks of symmetric-key encryption, in comparison to public-key encryption (also known as asymmetric-key encryption). However, symmetric-key encryption algorithms are usually better for bulk encryption. They have a smaller key size, which means less storage space and faster transmission. Due to this, asymmetric-key encryption is often used to exchange the secret key for symmetric-key encryption. Types Symmetric-key encryption can use either stream ciphers or block ciphers. * Stream ciphers encrypt the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaspersky Lab
Kaspersky Lab (; Russian: Лаборатория Касперского, tr. ''Laboratoriya Kasperskogo'') is a Russian multinational cybersecurity and anti-virus provider headquartered in Moscow, Russia, and operated by a holding company in the United Kingdom. It was founded in 1997 by Eugene Kaspersky, Natalya Kaspersky, and Alexey De-Monderik; Eugene Kaspersky is currently the CEO. Kaspersky Lab develops and sells antivirus, internet security, password management, endpoint security, and other cybersecurity products and services. Kaspersky expanded abroad from 2005 to 2010 and grew to $704 million in annual revenues by 2020, up 8% from 2016, though annual revenues were down 8% in North America due to U.S. government security concerns. As of 2016, the software has about 400 million users and has the largest market-share of cybersecurity software vendors in Europe. Kaspersky Lab ranks fourth in the global ranking of antivirus vendors by revenue. It was the first Russian company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windows Trojans
Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for servers, and Windows IoT for embedded systems. Defunct Windows families include Windows 9x, Windows Mobile, and Windows Phone. The first version of Windows was released on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs). Windows is the most popular desktop operating system in the world, with 75% market share , according to StatCounter. However, Windows is not the most used operating system when including both mobile and desktop OSes, due to Android's massive growth. , the most recent version of Windows is Windows 11 for consumer PCs and tablets, Windows 11 Enterprise for corporations, and Windows Server 2022 for servers. Genealogy By marketing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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