Home Malware Programs Trojans Spammer.Tedroo

Spammer.Tedroo

Posted: December 7, 2010

Threat Metric

Threat Level: 8/10
Infected PCs: 44
First Seen: December 7, 2010
OS(es) Affected: Windows

Spammer.Tedroo is a family of backdoor Trojans that create security vulnerabilities in your PC and use your computer's resources to send spam email messages. Different types of Spammer.Tedroo threats can disable important security programs, negatively alter system settings or allow remote attackers to control your PC. There may be no signs of Spammer.Tedroo's spamming activities or other attacks, but any Spammer.Tedroo infection is a high-level security threat. You can remove Spammer.Tedroo by disabling Spammer.Tedroo and using anti-virus software to remove Spammer.Tedroo and any threats that Spammer.Tedroo might have downloaded onto your computer.

Spammer.Tedroo – The Invisible Email Sender

There are many different variants of the basic Spammer.Tedroo infection, including Spammer:BAT/Tedroo, Spammer:Win32/Tedroo, Spammer:HTML/Tedroo, Spammer:WinNT/Tedroo, Spammer:Win32/Tedroo.AB, Spammer:Win32/Tedroo.AA, Spammer:Win32/Tedroo.I, Spammer:Win32/Tedroo.A and Spammer:Win32/Tedroo.gen!B. However, all of these types of Spammer.Tedroo all perform the same basic function: using your computer to send spam email to other people's mailboxes.

Spammer.Tedroo uses an internal SMTP email client to send out Spammer.Tedroo's spam and this prevents spam messages from showing up in your mailbox or in any other visible part of your PC. Despite being invisible, Spammer.Tedroo's activities may use up noticeably large amounts of memory and other system resources. This can cause slowdown in your computer and general instability.

The Non-Spam Tidbits in Spammer.Tedroo's Arsenal

As a full-blown Trojan threat, Spammer.Tedroo isn't limited to sending spam and may perform a number of other functions, some of which are extremely harmful to your computer:

  • Some versions of Spammer.Tedroo have been seen using the Registry to alter your default browser settings. This lets Spammer.Tedroo hijack Internet Explorer and other popular web browsers and control which website you're able to visit.
  • Spammer.Tedroo may perform the functions of an advertisement-clicker; advertisement-clickers will click on advertisements repeatedly to drive click-based revenue to criminals. Like Spammer.Tedroo's spamming, this attack may use up a high amount of system resources.
  • Most versions of Spammer.Tedroo are also able to update themselves to add other harmful capabilities or alter their settings to adapt to the infected computer.
  • Spammer.Tedroo has also been seen forcing computers to participate in DDoS or Distributed-Denial-of-Service attacks. These attacks crash websites by flooding them with traffic and are highly illegal although not directly dangerous to your PC.
  • Most Spammer.Tedroo infections can also download and install other files, including potentially malicious ones.
  • Lastly, Spammer.Tedroo can disable different security-related programs and services. This includes Shared Access and the Windows Firewall. A disabled firewall leaves your computer highly vulnerable to attacks by remote criminals.

Even though Spammer.Tedroo may be all but invisible in Spammer.Tedroo's attacks, Spammer.Tedroo infections are still extremely dangerous for your PC security and should be dealt with harshly and without hesitation. Anti-malware programs can delete Spammer.Tedroo regardless of which type of Spammer.Tedroo you have on your PC although you may need to download threat definition updates prior to trying to delete Spammer.Tedroo.

File System Modifications

  • The following files were created in the system:
    # File Name
    1 009547.exe
    2 09939939.exe
    3 14.exe
    4 34611015.exe
    5 68.tmp
    6 cacheautoobj.exe
    7 csrss.exe
    8 explorer.exe:userini.exe
    9 fb hack.exe
    10 mfpmsc.dll
    11 mstatea.dll
    12 msvmcls64.exe
    13 msvmiode.exe
    14 nbcqz.exe
    15 odcsskt.dat
    16 rarydse.dll
    17 rav.exe
    18 services.exe
    19 servises.exe
    20 setup.exe
    21 svchost.exe
    22 taskmgr.exe
    23 userini.exe
    24 userinit.exe
    25 winlagon.exe
    26 winlogon.exe
    27 winwrrh.exe
    28 wuauclt.exe

Aliases

Trj/CI.A [Panda]Downloader.Generic10.SRI [AVG]Trojan-Downloader.Win32.FraudLoad [Ikarus]Trojan.Win32.Generic.pak!cobra [Sunbelt]Trojan/Win32.FraudLoad [Antiy-AVL]PAK_Generic.012 [TrendMicro]TR/Dldr.FraudLoad.haz.2 [AntiVir]Trojan.Packed.20878 [DrWeb]Trojan-Downloader.Win32.FraudLoad.haz [Kaspersky]Win32:Crypt-HPM [Avast]a variant of Win32/Kryptik.GUO [NOD32]Generic.dx!twk [McAfee]FakeAlert.SK [AVG]Packed.Win32.Krap.gy!A2 [a-squared]Artemis!F2D4DBB3D77A [McAfee-GW-Edition]
More aliases (120)

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:



%ALLUSERSPROFILE%\Anwendungsdaten\79641027\79641027.exe File name: 79641027.exe
Size: 870.92 KB (870928 bytes)
MD5: 63ca8d0f8efa5c22dd5eb09a4a527b5f
Detection count: 95
File type: Executable File
Mime Type: unknown/exe
Path: %ALLUSERSPROFILE%\Anwendungsdaten\79641027
Group: Malware file
Last Updated: December 8, 2010
%TEMP%\fltMasks.dll File name: fltMasks.dll
Size: 40.96 KB (40960 bytes)
MD5: f2d4dbb3d77aebe00c2969ff05ad2297
Detection count: 34
File type: Dynamic link library
Mime Type: unknown/dll
Path: %TEMP%
Group: Malware file
Last Updated: December 8, 2010
%ALLUSERSPROFILE%\Application Data\49363934\49363934.exe File name: 49363934.exe
Size: 888.84 KB (888848 bytes)
MD5: 62bf2d052387c55d3009f4c87d773427
Detection count: 25
File type: Executable File
Mime Type: unknown/exe
Path: %ALLUSERSPROFILE%\Application Data\49363934
Group: Malware file
Last Updated: December 8, 2010
%WINDIR%\explorer.exe:userini.exe File name: explorer.exe:userini.exe
Size: 55.8 KB (55808 bytes)
MD5: 44b8c7bbe586bb7a54d136124d9b5028
Detection count: 24
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%
Group: Malware file
Last Updated: December 7, 2010
%ALLUSERSPROFILE%\Anwendungsdaten\38144121\38144121.exe File name: 38144121.exe
Size: 886.28 KB (886288 bytes)
MD5: d96b11a3b27b234227ab4ebb8a641aee
Detection count: 5
File type: Executable File
Mime Type: unknown/exe
Path: %ALLUSERSPROFILE%\Anwendungsdaten\38144121
Group: Malware file
Last Updated: December 8, 2010

More files

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