Overview |
Summary: |
Could be used as a distribution mechanism by worms or other malicious programs. initially presents itself as a Windows Cabinet (.cab) file named CoolStuff.cab. This file contains the ActiveX control file CoolStuff.ocx and the setup information file CoolStuff.inf. This file is usually obtained by visiting a malicious Website that then attempts to download and install CoolStuff.cab to your computer. Currently, this is the only way that this Trojan is known to infect computers. Once these files ar installed, the ActiveX control checks the process list to see if any of the following programs are running: Blackice.exe (Black Ice Defender) Blackd.exe (Black Ice Defender) Zonealarm.exe (ZoneAlarm Firewall) Smc.exe (Sygate Personal Firewall) Persfw.exe (Tiny Personal Firewall) Lookout.exe (ISS Network Sniffer application) Espwatch.exe (Esafe Protect Watch) Mpftray.exe (McAfee Personal Firewall) Serv95.exe (Esafe Eliashim) Nisum.exe (Norton Internet Security) Nmain.exe (Norton Internet Security) If any of these processes are running, Backdoor.Autoupder will terminate itself and do nothing. Otherwise, Backdoor.Autoupder will attempt to connect to one of the following Web sites, depending on its version: http:/ /www.online1net.com/ http:/ /www.wwws1.com/au/ From one of the listed Web sites, Backdoor.Autoupder will try to download one or more of the following files and place them in the \Windows folder: Ausvc.exe. This module may also download malicious packages from one of the two listed Websites, and may install these packages on the victim's computer. Bvt.exe. This module is referred to as the Browser Event component. It appears to have listening functions which allow backdoor capabilities. Mnsvc.exe. This module connects to one of the two listed Websites, and checks if there are any new updated versions of the backdoor Trojan. Absr.exe. This module is referred to as the Auto Browser component. It appears to be trying to connect to any random Website. It is possible that Backdoor.Autoupder will download other files instead. If one of the files has been downloaded successfully, Backdoor.Autoupder will terminate these processes if they are running, and execute the newly downloaded versions. Upon execution of the downloaded executables, and depending on which file was executed, Backdoor.Autoupder adds one of the following values: SysScan C:\WINDOWS\bvt.exe ausvc C:\WINDOWS\ausvc.exe ABsr C:\WINDOWS\absr.exe mnsvc C:\WINDOWS\mnsvc.exe to the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ Windows\CurrentVersion\Run Backdoor.Autoupder may add one or more of the following subkeys: {6541B981-2E27-46B1-A2CC-8264A75B74FE} {868B015F-3515-44DB-B0AD-182CD058985E} {9A05FE9B-5B52-4D13-A77D-FA7C38557A8E} {BAE85C97-2CD4-45C3-A1ED-E4CEF7C6AA52} {C76BE992-2BC3-41A4-8B87-A8C01FE419A7} {F53C844A-D9C8-4E92-B923-C05B46C4A7E3} {FBE091E5-DF43-4FFB-AECC-7E3A3BC7B0D9} to the registry key: HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID It may add the following (or other) subkeys: {8B034058-08B0-4CB3-B2E8-60238B4967F2} to the registry key HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\AppID It may add the following (or other) subkeys: {6D8B1B74-4AB8-473B-B479-253FA1936802} to the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\TypeLib Backdoor.Autoupder is also capable of checking for the presence of newer versions of itself on specific Web sites and silently updating itself. Backdoor.Autoupder has strings embedded inside its program that may refer to commands used to remotely control the victim's computer. |
Alias: |
Downloader-W [McAfee], security risk or a "backdoor" program [F-Prot], TROJ_SUA.A, Downloader - W, TrojanDownloader.Win32.Minstaller [Kaspersky], Win32.MinStaller [Computer Associates], Win32/Autoupder trojan [Eset], Win32/Downloader-W.A.Trojan [Computer Associates], Win32/Downloader-W.B.Trojan [Computer Associates], Win32/TrojanDownloader.Minstaller trojan [Eset] |
Category: |
Downloader: A program designed to retrieve and install additional files, when run. Most will be configured to retrieve from a designated web or FTP site.
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. |
Similar Pests: |
Downloader · Trojan |
Origins |
Date of Origin: |
May, 2002 |
Operation |
Storage Required: |
Backdoor.Autoupder: at least 101 KB |
Detection and Removal |
Automatic Removal: |
 PestPatrol detects this.
PestPatrol removes this.
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Manual Removal: |
Follow these steps to remove Backdoor.Autoupder 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. |
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Stop Running Processes:
Kill these running processes with Task Manager:
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Remove Files:
Remove these files (if present) with Windows Explorer:
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Research |
File Analyses: |
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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 |