![\"halloween\"](\"https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/37\/2013\/10\/05110928\/halloween1.jpeg\")
<\/a><\/p>\n\u00a0<\/p>\n
Cascade<\/b>:<\/p>\n
MadMan<\/b>:<\/p>\n AIDS<\/b>:<\/p>\n Skulls (Skuller)<\/b>:<\/p>\n Tequila<\/b>:<\/p>\n Kuku<\/b>:<\/p>\n \u00a0<\/p>\n Rigel<\/b>:<\/p>\n Gruel<\/b>:<\/p>\n \u201cYour computer now is mine, Why? Because I didn\u2019t had nothing to do and I thought, why not make the evil? Remember NOW YOUR PC IS IN MY POWER Windows Sucks! I can\u2019t stand it anymore!\u201d And on and on, singed, \u2018KILLERGUATE.\u2019<\/p>\n Unlike a lot of the previous, relatively harmless DOS infections, this one was pretty nasty. It removed the Run option from the Start menu, making it very difficult to remove.<\/p>\n","protected":false},"excerpt":{"rendered":" The only thing scarier than a computer virus with the power to destroy your system or steal\u00a0 all of your precious data stored on it\u00a0 are viruses that do so<\/p>\n","protected":false},"author":41,"featured_media":2523,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1486],"tags":[145],"class_list":{"0":"post-2522","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-threats","8":"tag-virus"},"hreflang":[{"hreflang":"en-ae","url":"https:\/\/me-en.kaspersky.com\/blog\/8-all-time-scariest-looking-viruses\/2522\/"},{"hreflang":"en-in","url":"https:\/\/www.kaspersky.co.in\/blog\/8-all-time-scariest-looking-viruses\/2631\/"},{"hreflang":"en-us","url":"https:\/\/usa.kaspersky.com\/blog\/8-all-time-scariest-looking-viruses\/2808\/"},{"hreflang":"en-gb","url":"https:\/\/www.kaspersky.co.uk\/blog\/8-all-time-scariest-looking-viruses\/2629\/"},{"hreflang":"x-default","url":"https:\/\/www.kaspersky.com\/blog\/8-all-time-scariest-looking-viruses\/3049\/"},{"hreflang":"ja","url":"https:\/\/blog.kaspersky.co.jp\/8-all-time-scariest-looking-viruses\/1929\/"},{"hreflang":"en-au","url":"https:\/\/www.kaspersky.com.au\/blog\/8-all-time-scariest-looking-viruses\/3049\/"},{"hreflang":"en-za","url":"https:\/\/www.kaspersky.co.za\/blog\/8-all-time-scariest-looking-viruses\/3049\/"}],"acf":[],"banners":"","maintag":{"url":"https:\/\/me-en.kaspersky.com\/blog\/tag\/virus\/","name":"Virus"},"_links":{"self":[{"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/posts\/2522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/users\/41"}],"replies":[{"embeddable":true,"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/comments?post=2522"}],"version-history":[{"count":1,"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/posts\/2522\/revisions"}],"predecessor-version":[{"id":8597,"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/posts\/2522\/revisions\/8597"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/media\/2523"}],"wp:attachment":[{"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/media?parent=2522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/categories?post=2522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/me-en.kaspersky.com\/blog\/wp-json\/wp\/v2\/tags?post=2522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/a>Not much is scarier to a user than watching their system literally fall apart. That\u2019s what the Cascade<\/a> virus did in the late 80s and early 90s. When installed, it would cause characters in DOS to drop<\/a> to the bottom of the screen, rendering computing useless while it was doing that, a process it repeated periodically. It also seems to have inspired an episode of \u201cStar Trek: Voyager\u201d that featured a computer virus by the same name<\/a>.<\/p>\n<\/a>This DOS virus wasn\u2019t terribly damaging but it produced the startling image<\/a> of a red-faced man\u2019s narrowed eyes, then displayed the text \u2018Nothing can save you here, friend \u2013 you\u2019re in my world now.\u2019 Attempts to remove it prompted \u2018I\u2019m watching you\u2019 scripts, but ultimately the virus itself had little bite.<\/p>\n<\/a>This was one of the more tasteless \u2014 and, yes, frightening \u2014 programs ever. Another early \u201990s DOS infection, it took over<\/a> the user\u2019s screen and, after a long and profane welcome message, informed them in very large lettering that their system had been infected with AIDS. The system had to be rebooted at that point, and the infected .COM files had to be deleted and replaced to eliminate the virus.<\/p>\n<\/a>This Trojan<\/a> attacked the Symbian mobile OS, which was the most popular one back to 2004.\u00a0 Disguising itself as a phone decoration app, Skulls acted by replacing icons on the screen with skulls-and-crossbones images and rendering standard applications unusable. So Kaspersky Lab experts lawfully called this malware \u201cVandal Trojan\u201d. Skulls\u00a0 was an early version of the now-widespread mobile malware, and it was certainly frightening.<\/p>\n<\/a>Tequila<\/a> infected .exe DOS files. Once resident, the fourth execution of any infected system produced<\/a> a crude Mandelbrot fractal image \u2014 a graphic representation of a type of mathematical set<\/a> \u2014 with a prompt that, when followed, produced this joyous message: \u201c\u2026 T.TEQUILA\u2019s latest production. Contact T.TEQUILA\/P.o.Box 543\/6312 St\u2019hausen Switzerland. Loving thought to L.I.N.D.A. BEER and TEQUILA forever !\u201d The message belied the relatively toothless effect of the virus, but the Mandelbrot image was quite startling.<\/p>\n<\/a>Another DOS virus that created a startling image<\/a> that would scare the daylights out of anyone concerned with their system\u2019s safety, Kuku<\/a> produced multi-colored tiles that slowly filled the screen while incessantly blinking the world \u2018Kuku!\u2019, which means pick-a-boo in Russian.<\/p>\n<\/a>This Windows virus executed on Dec. 22 and executed its payload by \u2018drawing\u2019 all of the library of Windows icons in random patterns across the screen. It didn\u2019t directly effect other functions, but made doing anything on the computer difficult simply because of its visual activity.<\/p>\n<\/a>This Windows worm<\/a> was among the earliest form of fake antivirus programs posing as a security patch that was anything but. Upon activation it displayed<\/a> a fake error message, opened various standard Windows folders and would even eject the CD-ROM tray. Then it popped up a lengthy rant that read, in part:<\/p>\n