The document discusses logic bombs, which are hidden sets of instructions in software that execute malicious actions when certain conditions are met. It outlines their characteristics, examples of notable incidents, and emphasizes the importance of using reliable antivirus software and data backup solutions to prevent and mitigate damage from such threats. The article serves as a comprehensive guide on recognizing and avoiding logic bomb viruses.

1. Title: [Review] What Is a Logic Bomb & How to Avoid Logic Bomb Viruses?
Keywords: logicbomb,logicbombvirus,whatisa Logicbomb, logicbombexamples,logicbomb
malware
Description: What is the meaning of the term logic bomb? What are the features and examples of
logic bomb malware? Finally, how to protect yourself from logic bombs?
URL: https://www.minitool.com/news/logic-bomb-virus.html
Summary: This article posted by MiniTool Tech reviews the definition, characteristics,examples, as
well as preventions of logic bombs. Just within a 3-minute reading, you will find all information you
want!
What Is a Logic Bomb Virus?
What Is Logic Bomb?
Usually,a logicbombreferstoa set of instructionsthatare includedwithinaprogramsecretly.
Whena certainconditionissatisfied,theywill be executedusuallywithbadinfluences.
Software thatisinherentlyharmfulusuallycontains logicbombsthatwill execute aparticular
payloadat a presettime orwhensome otherconditionismet. So, forlogic bombdefinition,there is
alsosayingthat a logic bomb is the eventor conditionthat determineswhenthe payload is
activated or delivered.
Tip: As forthe conditionsthatcontrolthe payload,they can beclassified into positive conditionsand
negativeconditions.Positiveconditionsreferto something happening such asprogramsrunning
while negativeconditionsreferto something nothappening likenotlogging in.
The technologycanbe adoptedbya virusor wormto get momentumandspreadbefore being
discovered.Some virusesattack the infectedcomputersoncertaindates.And, trojansandother

2. virusesthatactivate onspecificdatesare usuallycalled“time bombs”.Viruses thattake advantage
of the logicbombtechnique are knownaslogicbombviruses.
To be consideredalogicbomb,the payloadshouldbe unknownandunwantedtothe userof the
software. Therefore,itisdifficulttodetectlogicbombsbeforetheyrevealthemselves. Example
logic bomblike a programmermayhide a piece of code that will startdeletingfilesrelatedto
himself once he everisterminatedfromacompany.
What is anothername for a Logic bomb? That isa slag code,a manipulatedcode thatmakesan
otherwise safe applicationharmful.Time bombsare acommon type of logicbombs.Sometimes,the
2 termsare usedinterchangeably.
Tip:
 In somesituations,logicbombsarenamed code bombs or cyber bombs.
 If a snippetof codeis inserted into a programto stop trial softwarefromworking when an
unauthorized userlogsin until hepaysfor it, it is technically a kind of time bomb.Yet, since
“time bomb”is usually a derogatory termlike “logic bomb”,peopleuse“trialware” to refer
to thatkind of code.
Logic Bomb Characteristics
No matterwhichname isused,the attack principle of the logicbombisthe same.
 Carry an unknownpayloadthatimplementsthe attack.
 Lie dormantuntil triggered.
 Deliverthe payloadwhenaparticularsituationappears.
The usual triggersof the logicbombare:
 A specificdate
 A specificamountof time haspassed
 A specificprogramlaunches
 Failedtologin
 A certaintransactionisprocessed
And,the commonbad effectsthat logicbombcan cause include:
 File deletion
 Diskswipeout
 Data damage
 Private datacollection
 Siphonoff funds
https://www.minitool.com/backup-tips/fileless-malware.html
Logic Bomb Examples
Besidesthe example mentioned inthe above content,there are alot of otherinstancesof logic
bombs.
In the early2000s, due to a salarydispute,aUBS Global employeenamedRogerDuronioplanteda
time bombto damage the company’scomputernetworkfordrivingdownthe company’sstock.This
caused$3.1 million indamage.

3. In 2005, Sony gotenmeshedinascandal for releasingCDsthatunleashedalogicbombwhen
insertedintoacomputer.the logicbombonthe CDs installeda rootkitthatpreventedthe PC’s
abilitytocopythe CDs.
In 2013, the hackergroup puta time bombinside malware andinfectedover32,000 systemsin
SouthKorea.The malware wipedthe harddrives andmasterbootrecords of victimsincluding at
least3 banks and 2 broadcastingcompaniescausinghavocacrossthe country. Symantecreported
that the logic bomb malware also containsa componentthatwasable to wipe Linux computers.
In 2016, at a branch of the Siemenscorporation,aprogrammercalledDavidTinleyintentionally
createdspreadsheetsoftware withlogicbombs.Thus,the software malfunctionsafteracertain
amountof time.So,the companyhad to keephiringhimbacktofix the problem. The logicbombs
wentunfoundfor2 yearsuntil thenhe was outof townand had tohand overthe administrative
passwordto hissoftware.
https://www.minitool.com/backup-tips/mydoom-virus.html
How to Defend Yourself from Logic Bomb Attacks?
Since logicbombvirusesare hardto detect,you’dbetterstopthemfromgetting intoyour
computer.To dothat, firstof all,you have to keepagood behaviorwhile usingthe Internetandbe
careful todownloadonline filesorclickunknownlinks.
If you doubtthat youmay alreadyhave logicbombsonyour machine,youcanrelyon a robust
antivirusprogramto detectandremove themfromyourPC,such as AVGAntiVirusFree.
If you haven’tyetbeenattackedbylogicbombs,youare recommendedtomake abackup of your
crucial data via a professionalandreliable programlike MiniTool ShadowMaker,whichcanhelpyou
back up notonlyimportantfiles/foldersbutalsoharddisksor systemandwithschedulesand
schemes.
SM-Trial
Conclusion
All inall,a logicbombis a piece of code intentionallyinsertedintoasoftware systemthatwill setoff
a maliciousfunctionwhencertainconditionsare met.Itisdifficulttonotice alogicbombuntil it
operates itsfunctionsandcausesgreatdata loss.Therefore,itisof greatimportance torelyona
powerful securityapptoprotectyourcomputerand a data backupprogram to copyvital files
regularly.