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Barrotes
Barrotes is a computer virus, considered as the first of Spanish origin, which appeared in December 1992, and was programmed in assembly language for DOS-based systems. Initially, although to a lesser extent, it was also called Toledo by the press, due to the location in the homonymous city of its first discovery, and registered as Virus:DOS/Barrotes by Microsoft. Like many viruses of the time, it remains dormant in the affected machine, waiting for a specific date to execute its malicious code, also called payload, with the date chosen by its developer being 5 January, a very important date in Spain, as it is the night of the Biblical Magi, displaying the message ''«Virus BARROTES por OSoft»'' and the on-screen graphics of the characteristic bars that give it its name and make it look like the system is in a prison cell. Features The virus occupies a total of 1310 bytes in size and infects COM and EXE executable files. When an infected file is executed on the system, the ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stoned (computer Virus)
Stoned is a boot sector computer virus created in 1987. It is one of the first viruses and is thought to have been written by a student in Wellington, New Zealand. By 1989 it had spread widely in New Zealand and Australia, and variants became very common worldwide in the early 1990s. A computer infected with the original version had a one in eight probability that the screen would declare: ''"Your PC is now Stoned!"'', a phrase found in infected boot sectors of infected floppy disks and master boot records of infected hard disks, along with the phrase ''"Legalise Marijuana"''. Later variants produced a range of other messages. Original version The original "Your PC is now stoned. Legalise Marijuana" was thought to have been written by a student in Wellington, New Zealand. This initial version appears to have been written by someone with experience only with IBM PC 360KB floppy drives, as it misbehaves on the IBM AT 1.2MB floppy, or on systems with more than 96files in the root ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michelangelo (computer Virus)
The Michelangelo virus is a computer virus first discovered on 3 February 1991 in Australia. The virus was designed to infect DOS systems, but did not engage the operating system or make any OS calls. Michelangelo, like all boot sector viruses, operated at the BIOS level. Each year, the virus remained dormant until March 6, the birthday of Renaissance artist Michelangelo. There is no reference to the artist in the virus, and it is doubtful that the virus's developer(s) intended a connection between the virus and the artist. The name was chosen by researchers who noticed the coincidence of the activation date. The actual significance of the date to the author is unknown. Michelangelo is a variant of the already endemic Stoned virus. On March 6, if the PC is an AT or a PS/2, the virus overwrites the first one hundred sectors of the hard disk with nulls. The virus assumes a geometry of 256 cylinder (disk drive), cylinders, 4 disk read-and-write head, heads, 17 disk sector, sectors pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brain (computer Virus)
Brain is the industry standard name for a computer virus that was released in its first form on 19 January 1986, and is considered to be the first computer virus for the IBM Personal Computer (IBM PC) and compatibles. Description Brain affects the PC by replacing the boot sector of a floppy disk with a copy of the virus. The real boot sector is moved to another sector and marked as bad. Infected disks usually have five kilobytes of bad sectors. The disk label is usually changed to ©Brain, and the following text can be seen in infected boot sectors: :Welcome to the Dungeon (c) 1986 Amjads (pvt) Ltd VIRUS_SHOE RECORD V9.0 Dedicated to the dynamic memories of millions of viruses who are no longer with us today - Thanks GOODNESS!!! BEWARE OF THE er..VIRUS : this program is catching program follows after these ....$#@%$@!! There are many minor and major variations to that version of the text. The virus slows down the floppy disk drive and makes seven kilobytes of memory unavailab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assembly Language
In computing, assembly language (alternatively assembler language or symbolic machine code), often referred to simply as assembly and commonly abbreviated as ASM or asm, is any low-level programming language with a very strong correspondence between the instructions in the language and the architecture's machine code instructions. Assembly language usually has one statement per machine instruction (1:1), but constants, comments, assembler directives, symbolic labels of, e.g., memory locations, registers, and macros are generally also supported. The first assembly code in which a language is used to represent machine code instructions is found in Kathleen and Andrew Donald Booth's 1947 work, ''Coding for A.R.C.''. Assembly code is converted into executable machine code by a utility program referred to as an '' assembler''. The term "assembler" is generally attributed to Wilkes, Wheeler and Gill in their 1951 book '' The Preparation of Programs for an Electronic Dig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Removable Media
In computing, a removable media is a data storage media that is designed to be readily inserted and removed from a system. Most early removable media, such as floppy disks and optical discs, require a dedicated read/write device (i.e. a drive) to be installed in the computer, while others, such as USB flash drives, are plug-and-play with all the hardware required to read them built into the device, so only need a driver software to be installed in order to communicate with the device. Some removable media readers/drives are integrated into the computer case, while others are standalone devices that need to be additionally installed or connected. Examples of removable media that require a dedicated reader drive include: * Optical discs, e.g. Blu-rays (both standard and UHD versions), DVDs, CDs * Flash memory-based memory cards, e.g. CompactFlash, Secure Digital, Memory Stick * Magnetic storage media ** Floppy and Zip disks (now obsolete) ** Disk packs (now obsolete) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Viruses
A computer virus is a type of malware that, when executed, replicates itself by modifying other computer programs and inserting its own code into those programs. If this replication succeeds, the affected areas are then said to be "infected" with a computer virus, a metaphor derived from biological viruses. Computer viruses generally require a host program. The virus writes its own code into the host program. When the program runs, the written virus program is executed first, causing infection and damage. By contrast, a computer worm does not need a host program, as it is an independent program or code chunk. Therefore, it is not restricted by the host program, but can run independently and actively carry out attacks. Virus writers use social engineering deceptions and exploit detailed knowledge of security vulnerabilities to initially infect systems and to spread the virus. Viruses use complex anti-detection/stealth strategies to evade antivirus software. Motives for creati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DOS Viruses
DOS (, ) is a family of disk-based operating systems for IBM PC compatible computers. The DOS family primarily consists of IBM PC DOS and a rebranded version, Microsoft's MS-DOS, both of which were introduced in 1981. Later compatible systems from other manufacturers include DR-DOS (1988), ROM-DOS (1989), PTS-DOS (1993), and FreeDOS (1994). MS-DOS dominated the IBM PC compatible market between 1981 and 1995. Although the name has come to be identified specifically with MS-DOS and compatible operating systems, ''DOS'' is a platform-independent acronym for ''disk operating system'', whose use predates the IBM PC. Dozens of other operating systems also use the acronym, beginning with the mainframe DOS/360 from 1966. Others include Apple DOS, Apple ProDOS, Atari DOS, Commodore DOS, TRSDOS, and AmigaDOS. History Origins IBM PC DOS (and the separately sold MS-DOS) and its predecessor, 86-DOS, ran on Intel 8086 16-bit processors. It was developed to be similar to Digit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assembly Language Software
Assembly may refer to: Organisations and meetings * Deliberative assembly, a gathering of members who use parliamentary procedure for making decisions * General assembly, an official meeting of the members of an organization or of their representatives * House of Assembly, a name given to the legislature or lower house of a bicameral legislature * National Assembly, either a legislature or the lower house of a bicameral legislature in some countries ** National Assembly (other) * Popular assembly, a localized citizen gathering to address issues of importance to the community * Qahal, or assembly, an Israelite organizational structure * People's Assembly (other) * Assembly of Experts, the deliberative body empowered to designate and dismiss the Supreme Leader of Iran * Freedom of assembly, the individual right to come together and collectively express, promote, pursue and defend common interests * School assembly, a gathering of all or part of a school Scien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boot Sector
A boot sector is the disk sector, sector of a persistent data storage device (e.g., hard disk, floppy disk, optical disc, etc.) which contains machine code to be loaded into random-access memory (RAM) and then executed by a computer system's built-in firmware (e.g., the BIOS). Usually, the first sector of the hard disk is the boot sector, regardless of sector size (512 or 4096 bytes) and partitioning flavor (Master boot record, MBR or GUID Partition Table, GPT). The purpose of defining one particular sector as the ''boot sector'' is inter-operability between firmware and various operating systems. The purpose of chain-loading, first firmware (e.g., the BIOS), then code in the boot sector, and then, for example, an operating system, is maximal flexibility. The IBM PC and compatible computers On an IBM PC compatible machine, the BIOS selects a boot device, then copies the first sector from the device (which may be a master boot record, MBR, Volume Boot Record, VBR or any exec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floppy Disk
A floppy disk or floppy diskette (casually referred to as a floppy, a diskette, or a disk) is a type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined with a fabric that removes dust particles from the spinning disk. The three most popular (and commercially available) floppy disks are the 8-inch, 5¼-inch, and 3½-inch floppy disks. Floppy disks store digital data which can be read and written when the disk is inserted into a floppy disk drive (FDD) connected to or inside a computer or other device. The first floppy disks, invented and made by IBM in 1971, had a disk diameter of . Subsequently, the 5¼-inch (133.35 mm) and then the 3½-inch (88.9 mm) became a ubiquitous form of data storage and transfer into the first years of the 21st century. 3½-inch floppy disks can still be used with an external USB floppy disk drive. USB drives for 5¼-inch, 8-inch, and other-size floppy disks are rare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1990s
File:1990s decade montage.png, From top left, clockwise: The Hubble Space Telescope orbits the Earth after it was launched in 1990; American jets fly over burning oil fields in the 1991 Gulf War; the Oslo Accords on 13 September 1993; the World Wide Web gains History of the World Wide Web#1994–2004: Open standards, going global, massive popularity worldwide; Boris Yeltsin greets crowds after the failed August Coup, which leads to the dissolution of the Soviet Union on 26 December 1991; Dolly (sheep), Dolly the sheep is the first mammal to be cloned from an adult somatic cell; the Funeral of Diana, Princess of Wales, funeral procession of Diana, Princess of Wales, who Death of Diana, Princess of Wales, died in a 1997 car crash, and was mourned by millions; hundreds of thousands of Tutsi people are killed in the Rwandan genocide of 1994, upright=1.4, thumb rect 1 1 385 312 Hubble Space Telescope rect 392 1 1101 312 Gulf War rect 477 318 1101 718 Oslo Accords rect 723 724 1101 108 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Virus
A computer virus is a type of malware that, when executed, replicates itself by modifying other computer programs and Code injection, inserting its own Computer language, code into those programs. If this replication succeeds, the affected areas are then said to be "infected" with a computer virus, a metaphor derived from biological viruses. Computer viruses generally require a Computer program, host program. The virus writes its own code into the host program. When the program runs, the written virus program is executed first, causing infection and damage. By contrast, a computer worm does not need a host program, as it is an independent program or code chunk. Therefore, it is not restricted by the Computer program, host program, but can run independently and actively carry out attacks. Virus writers use social engineering (security), social engineering deceptions and exploit detailed knowledge of vulnerability (computing), security vulnerabilities to initially infect systems an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
