Definition ÞVirus : A true virus is capable of self replication on a machine. It may spread between files or disks, but the defining character is that.

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Presentation transcript:

Definition ÞVirus : A true virus is capable of self replication on a machine. It may spread between files or disks, but the defining character is that it can recreate itself on it’s own with out traveling to a new host

Grade 9 Unit: Core Operation Activity 14: Viruses

Viruses Internet Crimes: ◦Spamming: ◦Phishing: ◦Hacking: ◦Mind Engineering: ◦Viruses

Symptoms of Virus Attack z Computer runs slower then usual z Computer no longer boots up z Screen sometimes flicker z PC speaker beeps periodically z System crashes for no reason z Files/directories sometimes disappear z Denial of Service (DoS)

Virus through the Internet zToday almost 87% of all viruses are spread through the internet (source: ZDNet) zTransmission time to a new host is relatively low, on the order of hours to days z“Latent virus”

Classifying Virus - General zVirus Information Discovery Date: Origin: Length: Type: SubType: Risk Assessment: Category:

Classifying Virus - Types zTrojan Horse zWorm zMacro

Trojan Horse zBack Orifice Discovery Date: 10/15/1998 Origin:Pro-hacker Website Length:124,928 Type: Trojan SubType:Remote Access Risk Assessment: Low Category: Stealth

Worms zBubbleboy Discovery Date:11/8/1999 Origin:Argentina (?) Length:4992 Type:Worm/Macro SubType:VbScript Risk Assessment: Low Category: Stealth/Companion

Macro Viruses A macro virus is a virus that attaches itself to a spreadsheet worksheet, or is programmed into the spreadsheet. It also could be programmed into other products such as Word documents and Microsoft PowerPoint® presentations and so on.

Macro zSpecific to certain applications zComprise a high percentage of the viruses zUsually made in WordBasic and Visual Basic for Applications (VBA) zMicrosoft shipped “Concept”, the first macro virus, on a CD ROM called "Windows 95 Software Compatibility Test" in 1995

Macro zMelissa Discovery Date:3/26/1999 Origin:Newsgroup Posting Length:varies depending on variant Type:Macro/Worm Subtype:Macro Risk Assessment:High Category:Companion

Protection/Prevention zKnowledge zProper configurations zRun only necessary programs zAnti-virus software