{"id":535,"date":"2019-09-14T12:01:53","date_gmt":"2019-09-14T11:01:53","guid":{"rendered":"http:\/\/zerothcode.com\/blog\/?p=535"},"modified":"2019-09-14T12:50:51","modified_gmt":"2019-09-14T11:50:51","slug":"use-malicious-softwares","status":"publish","type":"post","link":"https:\/\/zerothcode.com\/blog\/use-malicious-softwares\/","title":{"rendered":"How to use Malicious Softwares?"},"content":{"rendered":"
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What is Malicious Softwares ? What is the type of Malicious Softwares?<\/h3>\n
<\/a><\/div>\n

<\/h3>\n
\u00a0 Malware is malicious software.\u00a0 This software includes the program that exploits the vulnerabilities in the computing system.\u00a0 Malicious Softwares<\/div>\n
<\/div>\n
The purpose of malicious software is to harm you or steal the information from you.<\/div>\n
<\/div>\n
Types of\u00a0 Malicious Softwares: (Malicious Softwares)<\/b><\/i><\/div>\n
There are three characteristics of malware:1 Self-replicating malware actively attempts to propagate by creating new copies, or instances, of itself. Malware may also be propagated passively, by a user copying it accidentally, for example, but this isn’t self-replication.<\/p>\n

2 The\u00a0population<\/span> growth of malware describes the overall change in the number of malware instances due to self-replication. Malware that doesn’t self-replicate will always have a\u00a0zero population growth<\/span>, but malware with a zero population growth may self-replicate.<\/p>\n

3 Parasitic malware requires some other executable code in order to\u00a0exist<\/span>. “Executable” in this context should be taken very broadly to include anything that can be executed, such as boot block code on a disk, binary code<\/p>\n<\/div>\n

<\/div>\n
Trojan Horse<\/b>: (Malicious Softwares)<\/div>\n
<\/div>\n
<\/a><\/div>\n
\u00a0Self-replicating: no
\nPopulation growth: zero
\nParasitic: yes<\/div>\n
<\/div>\n
\n

The most famous malicious software is the Trojan Horse.<\/p>\n

There was no love lost between the Greeks and the Trojans. The Greeks had
\nbesieged the Trojans, holed up in the city of Troy, for ten years. They finally
\ntook the city by using a clever ploy: the Greeks built an enormous wooden horse,
\nconcealing soldiers inside, and tricked the Trojans into bringing the horse into
\nTroy. When night fell, the soldiers exited the horse and much unpleasantness
\nensued.<\/p>\n

In computing, a Trojan horse is a program which purports to do some benign
\ntask, but secretly performs some additional malicious task. A classic example is
\na password-grabbing login program which prints authentic-looking “username”
\nand “password” prompts, and waits for a user to type in the information. When
\nthis happens, the password grabber stashes the information away for its creator,
\nthen prints out an “invalid password” message before running the real login
\nprogram. The unsuspecting user thinks they made a typing mistake and reenters
\nthe information, none the wiser.<\/p>\n<\/div>\n

<\/div>\n
Logic Bomb:<\/b><\/div>\n
<\/div>\n
<\/a><\/b><\/div>\n

Self-replicating: no
\nPopulation growth: zero
\nParasitic: possibly
\nThe oldest type of malicious software.\u00a0 This program is embedded with some other program.\u00a0 When certain condition meets, the logic bomb will destroy your pc.
\nIt also crashes at a particular date which is fixed by the attacker.\u00a0 It will be included in a legitimate or authorized person like this:<\/p>\n

<\/div>\n
legitimate code
\nif the date is Friday the 13th:
\ncrash_computerO
\nlegitimate code<\/div>\n
<\/div>\n
\n

Eg: if some antivirus trying to delete or clean the logic bomb.\u00a0 The logic bomb will destroy the pc.<\/p>\n


\n<\/b>Back Door or Trap Door<\/b>:<\/p>\n<\/div>\n

<\/div>\n
<\/a><\/div>\n
\u00a0Self-replicating: no
\nPopulation growth: zero
\nParasitic: possiblyA back door is any mechanism which bypasses a normal security check. Programmers sometimes create back doors for legitimate reasons, such as skipping a time-consuming authentication process when debugging a network server. As with logic bombs, back doors can be placed into legitimate code or be standalone programs.<\/p>\n<\/div>\n
<\/div>\n
<\/div>\n
username = read_username()
\npassword = read_password()
\nif tisername i s “133t h4ck0r”:
\nreturn ALLOW^LOGIN
\nif username and password are valid:
\nreturn ALLOW_LOGIN
\ne l s e:
\nreturn DENY^LOGIN<\/div>\n
<\/div>\n
\n

One special kind of back door is a RAT, which stands for Remote Administration Tool or Remote Access Trojan, depending on who’s asked. These programs allow a computer to be monitored and controlled remotely;<\/p>\n

Virus<\/b>:
\nSelf-replicating: yes
\nPopulation growth: positive
\nParasitic: yes<\/p>\n

A virus is a malware that, when executed, tries to replicate itself into other executable code; when it succeeds, the code is said to be infected. The infected code, when run, can infect new code in turn. This self-replication into existing executable code is the key defining characteristic of a virus.<\/p>\n<\/div>\n

Types of Virus<\/i><\/div>\n
<\/div>\n
1.Parasitic virus:
\nTraditional and common virus.\u00a0 This will be attached with EXE files and search for other EXE file<\/span>\u00a0to infect them.
\n2. Memory Resident Virus:
\nPresent in your system memory as a system program.\u00a0 From here onwards it will infects all program that executes.
\n3. Boot Sector Virus:
\nInfects the boot record and spread when the system is booted from the disk containing the virus.
\n4. Stealth Virus:
\nThis virus hides from the detection of antivirus scanning.Worm:<\/b><\/p>\n<\/div>\n
<\/div>\n
<\/a><\/div>\n
\u00a0<\/b>\u00a0Self-replicating: yes
\nPopulation growth: positive
\nParasitic: no
\n
\n<\/b>A worm shares several characteristics with a virus. The most important characteristic is that worms are self-replicating too, but the self-replication of a worm is distinct in two ways. First, worms are standalone and do not rely on other
\nexecutable code. Second, worms spread from machine to machine across networks.
\n
\n<\/b>
\n<\/b>Rabbit:<\/b>
\nSelf-replicating: yes
\nPopulation growth: zero
\nParasitic: no
\nRabbit is the term used to describe malware that multiplies rapidly. Rabbits may also be called bacteria, for largely the same reason.There are actually two kinds of a rabbit. The first is a program which tries to consume all of some system resource, like disk space. A “fork bomb,” a program which creates new processes in an infinite loop, is a classic example of this kind of rabbit. These tend to leave painfully obvious trails pointing to the perpetrator and are not of particular interest.<\/p>\n

The second kind of rabbit, which the characteristics above describe, is a special case of a worm. This kind of rabbit is a standalone program which replicates itself across a network from machine to machine but deletes the original copy of itself after replication. In other words, there is only one copy of a given rabbit on a network; it just hops from one computer to another. Rabbits are rarely seen in practice.
\n
\n<\/b>Spyware:<\/b><\/p>\n<\/div>\n

<\/a><\/div>\n
\u00a0<\/b>Spyware is software which collects information from a computer and transmits to\u00a0someone else.
\n
\n<\/b>The exact information spyware gathers may vary, but can include anything which\u00a0potentially has value:1 Usernames and passwords. These might be harvested from files on the machine, or by recording what the user types using a\u00a0key logger<\/span>. A keylogger differs from a Trojan horse in that a keylogger passively captures keystrokes
\nonly; no active deception is involved.<\/p>\n

2 Email addresses, which would have value to a spammer.<\/p>\n

3 Bank account and\u00a0credit card numbers<\/span>.<\/p>\n

4 Software license keys, to facilitate software pirating.
\nDefinitions
\n
\n<\/b>Adware:<\/b><\/p>\n<\/div>\n

<\/div>\n
\n
\"Malicious<\/a>
Malicious Softwares<\/figcaption><\/figure>\n<\/div>\n
\u00a0<\/b>Self-replicating: no
\nPopulation growth: zero
\nParasitic: noAdware has similarities to spyware in that both are gathering information about the user and their habits. Adware is more marketing-focused and may pop up advertisements or redirect a user’s web browser to certain web sites in the hopes of making a sale. Some adware will\u00a0attempt<\/span> to target the advertisement to fit the context of what the user is doing. For example, a search for “Calgary” may result in<\/span> an unsolicited pop-up advertisement for “books about Calgary.” Adware may also gather and transmit information about users which can be used for marketing purposes. As with spyware, adware does not self-replicate.
\n
\n<\/b>Zombies:<\/b>
\n
\n<\/b>Computers that have been compromised can be used by an attacker for a variety of tasks, unbeknownst to the legitimate owner; computers used in this way are called zombies. The most common tasks for zombies are sending spam and participating in coordinated, large-scale denial-of-service attacks.<\/p>\n<\/div>\n

Signs that your system is Infected by Malware:<\/h3>\n
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