Backdoor

· Overview ·
· Origins ·
· Distribution ·
· Operation ·
· Risks ·
· Detection and Removal ·
· Research ·

Overview
Summary:	A working name for some new Trojan or RAT that has not yet been fully identified. Also the name of a specific RAT: Remote access/admin tool and trojan. Many features. Deletes all files and subdirectories within the directory from which it is run.
Alias:	April_1st.Exe [Kaspersky], Backdoor.Inuk, Backdoor.Notpa, Backdoor.Zemac.a, Backdoor.Zemac.b, Backdoor.Zemac.c, Backdoor.Zemac.d, contains Suriv_2.1488.C (non-working) [F-Prot], destructive program [F-Prot], MultiDropper-E [McAfee], Nomenklatura [McAfee], Nomenklatura.1024.A [F-Prot], Nomenklatura.a [Kaspersky], Quit [McAfee], Quit.555.a [Kaspersky], Quit.555.B [F-Prot], Suriv.1488 [McAfee], Trojan.AOL.PS.ej [Kaspersky], TrojanDropper.Win32.EliteWrap.103 [Kaspersky]
Category:	RAT: A Remote Administration Tool, or RAT, is a Trojan that when run, provides an attacker with the capability of remotely controlling a machine via a ""client"" in the attacker's machine, and a ""server"" in the victim's machine. Examples include Back Orifice, NetBus, SubSeven, and Hack'a'tack. What happens when a server is installed in a victim's machine depends on the capabilities of the trojan, the interests of the attacker, and whether or not control of the server is ever gained by another attacker -- who might have entirely different interests. Infections by remote administration Trojans on Windows machines are becoming as frequent as viruses. One common vector is through File and Print Sharing, when home users inadvertently open up their system to the rest of the world. If an attacker has access to the hard-drive, he/she can place the trojan in the startup folder. This will run the trojan the next time the user logs in. Another common vector is when the attacker simply e-mails the trojan to the user along with a social engineering hack that convinces the user to run it against their better judgment. Backdoor: A secret or undocumented means of getting into a computer system, or software that uses such a means to penetrate a system. Some software has a backdoor placed by the programmer to allow them to gain access to troubleshoot or change the program. Software that is classified as a "backdoor" is designed to exploit a vulnerability in a system, and open it to future access by an attacker. Exploit: A way of breaking into a system. An exploit takes advantage of a weakness in a system in order to hack it. Exploits are the root of the hacker culture. Hackers gain fame by discovering an exploit. Others gain fame by writing scripts for it. Legions of script-kiddies apply the exploit to millions of systems, whether it makes sense or not. Since people make the same mistakes over-and-over, exploits for very different systems start to look very much like each other. Most exploits can be classified under major categories: buffer overflow, directory climbing, defaults, Denial of Service. Trojan: Any program with a hidden intent. Trojans are one of the leading causes of breaking into machines. If you pull down a program from a chat room, new group, or even from unsolicited e-mail, then the program is likely trojaned with some subversive purpose. The word Trojan can be used as a verb: To trojan a program is to add subversive functionality to an existing program. For example, a trojaned login program might be programmed to accept a certain password for any user's account that the hacker can use to log back into the system at any time. Rootkits often contain a suite of such trojaned programs. Virus Creation Tool: A program designed to generate viruses. Even early virus creation tools were able to generate hundreds or thousands of different, functioning viruses, which were initially undetectable by current scanners.
Variants:	Backdoor 1.x Backdoor 2.00 Backdoor 2.01 Backdoor 2.02 Backdoor 2.03 Backdoor 2.1 Backdoor.AF Backdoor.BLA Backdoor.BO Backdoor.Cow Backdoor.HAW BackDoor.JZ Backdoor.MDM Backdoor.NB Backdoor.Pld Backdoor.RAW Backdoor.RDR Backdoor.sh Backdoor.TMS Backdoor.VB Backdoor.Xel Backdoor.XHX Backdoor.Xot Backdoor.ZKT
Similar Pests:	RAT · Backdoor · Exploit · Trojan · Virus Creation Tool
Origins
Author:	ZeMac
Date of Origin:	Variants from April, 1997 to May, 2004
Distribution
Prevalence:	Backdoor: < 0.00005% More Info
Clot Factor:	Backdoor: 1 The "Clot Factor" is a measure of how much a pest "gums up" a machine by adding registry entries, files, and directories. As more objects are placed in a machine, manual removal becomes more difficult and more error-prone.
Growth:	Backdoor: Insufficient data to report growth
Operation
Default Port:	1999, 1003 TCP More info about ports.
Storage Required:	Backdoor: at least 3497 KB Backdoor 1.x: at least 53 KB Backdoor 2.00: at least 521 KB Backdoor 2.01: at least 697 KB Backdoor 2.02: at least 293 KB Backdoor 2.03: at least 785 KB Backdoor 2.1: at least 57 KB Backdoor.AF: at least 21 KB Backdoor.Cow: at least 661 KB Backdoor.HAW: at least 333 KB Backdoor.MDM: at least 17 KB Backdoor.NB: at least 13 KB Backdoor.Pld: at least 645 KB Backdoor.RAW: at least 169 KB Backdoor.RDR: at least 57 KB Backdoor.TMS: at least 121 KB Backdoor.Xel: at least 193 KB Backdoor.Xot: at least 173 KB Backdoor.ZKT: at least 245 KB
Restart:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run Key: Notepad(c:\windows\notpa.exe /o=yes) Autostarting Pests
ScreenShot:

BackDoor 2.0

BackDoor 2.01

BackDoor 2.02

BackDoor 2.03

Risks
Detection Issues:	Difficult to detect by design. May hide from process list. May install with variable names in variable locations.
Detection and Removal
Automatic Removal:	PestPatrol detects this. PestPatrol removes this.
Manual Removal:	Follow these steps to remove Backdoor from your machine. Begin by backing up your registry and your system, and/or setting a Restore Point, to prevent trouble if you make a mistake.
	Stop Running Processes: Kill these running processes with Task Manager: 011e3ecab24891617792f6cc556c541f.exe 02a572cd0e1d2ff8393075b839efcb64.exe 04986c5cdcecf53f6bf739c1599a03ce.exe 061da56505834b273a475f3827544e17.exe 07596ec68058a0eba10bf02b7a88d048.exe 07ff265743f71b15cc23bb814557f8e5.exe 0ad266c58b49ee7d239b032b4c69e628.exe 0c0002d8878bf0f373d352332ae7124f.exe 0c573e14354d5b00e91161d3deef0df7.exe 0ef88726226d112172058358b80f9b03.exe -1134054079.exe 1427142166.exe 146f8b1cc9be67e99e0ccc5ad10acfd2.exe 1476552388.exe 147bb8297e9cac245b35fc56c826f629.exe 1670a7b26eac340d7e177bbb47ddfee0.exe 1842849d10ce64dba5a853776610e006.exe 1b63703a58b3b17098c080c84a35bd85.exe 442804435.exe 959296333.exe b_login.exe backdoor.af.exe backdoor.exe backdoor.haw.exe backdoor.mdm.exe backdoor.nb.exe backdoor.pld.exe backdoor.raw.exe backdoor.rdr.exe backdoor.tms.exe backdoor.vb.ga.exe backdoor.xel.exe backdoor.zkt.exe ftpip.exe icqnuke.exe ppupdater.exe readme.exe showall.exe systemroot+\notpa.exe xxx.exe zemac.a.exe
	Remove Files: Remove these files (if present) with Windows Explorer: 011e3ecab24891617792f6cc556c541f.exe 02a572cd0e1d2ff8393075b839efcb64.exe 04986c5cdcecf53f6bf739c1599a03ce.exe 061da56505834b273a475f3827544e17.exe 07596ec68058a0eba10bf02b7a88d048.exe 07ff265743f71b15cc23bb814557f8e5.exe 0ad266c58b49ee7d239b032b4c69e628.exe 0c0002d8878bf0f373d352332ae7124f.exe 0c573e14354d5b00e91161d3deef0df7.exe 0ef88726226d112172058358b80f9b03.exe -1134054079.exe 1427142166.exe 146f8b1cc9be67e99e0ccc5ad10acfd2.exe 1476552388.exe 147bb8297e9cac245b35fc56c826f629.exe 1670a7b26eac340d7e177bbb47ddfee0.exe 1842849d10ce64dba5a853776610e006.exe 1b63703a58b3b17098c080c84a35bd85.exe 442804435.exe 959296333.exe b_login.exe backdoor.af.exe backdoor.c backdoor.exe backdoor.haw.exe backdoor.mdm.exe backdoor.nb.exe backdoor.pld.exe backdoor.raw.exe backdoor.rdr.exe backdoor.tms.exe backdoor.txt backdoor.vb.ga.exe backdoor.xel.exe backdoor.zkt.exe ftpip.exe icqnuke.exe manual.nfo na ppupdater.exe readme.exe runtime.txt server.txt showall.exe systemroot+\notpa.exe xxx.exe zemac.a.exe
Research
File Analyses:	Backdoor: 011e3ecab24891617792f6cc556c541f.exe · 02a572cd0e1d2ff8393075b839efcb64.exe · 04986c5cdcecf53f6bf739c1599a03ce.exe · 061da56505834b273a475f3827544e17.exe · 07596ec68058a0eba10bf02b7a88d048.exe · 07ff265743f71b15cc23bb814557f8e5.exe · 0ad266c58b49ee7d239b032b4c69e628.exe · 0c0002d8878bf0f373d352332ae7124f.exe · 0c573e14354d5b00e91161d3deef0df7.exe · 0ef88726226d112172058358b80f9b03.exe · 146f8b1cc9be67e99e0ccc5ad10acfd2.exe · 147bb8297e9cac245b35fc56c826f629.exe · 1670a7b26eac340d7e177bbb47ddfee0.exe · 1842849d10ce64dba5a853776610e006.exe · 1b63703a58b3b17098c080c84a35bd85.exe · 442804435.exe · backdoor.c · ftpip.exe · na · ppupdater.exe · showall.exe · xxx.exe Backdoor 1.x: b_login.exe · backdoor.exe · manual.nfo Backdoor 2.00: backdoor.exe · icqnuke.exe · readme.exe · server.txt Backdoor 2.01: -1134054079.exe · 1476552388.exe · backdoor.exe · backdoor.txt · icqnuke.exe · readme.exe Backdoor 2.02: backdoor.exe Backdoor 2.03: backdoor.exe · readme.exe · runtime.txt · zemac.a.exe Backdoor 2.1: backdoor.vb.ga.exe Backdoor.AF: backdoor.af.exe Backdoor.Cow: 959296333.exe Backdoor.HAW: backdoor.haw.exe Backdoor.MDM: backdoor.mdm.exe Backdoor.NB: backdoor.nb.exe Backdoor.Pld: backdoor.pld.exe Backdoor.RAW: backdoor.raw.exe Backdoor.RDR: backdoor.rdr.exe Backdoor.TMS: backdoor.tms.exe Backdoor.Xel: backdoor.xel.exe Backdoor.Xot: 1427142166.exe Backdoor.ZKT: backdoor.zkt.exe
More Info:	AllTheWeb, AltaVista, AOL Search, Ask Jeeves, Google, HotBot, Lycos, LookSmart, MSN, Yahoo!
Research By:	PestPatrol's Pest Research Center
Last Revised:	April 25, 2005