AD.EXE, Prevx

Associated Malware Groups

The unsafe files using this name are associated with the malware groups:

System Back Door
Worm
Malware Downloader

File Behavior

AD.EXE has been seen to perform the following behavior:

The Process is packed and/or encrypted using a software packing process
Adds products to the system registry
Adds a Registry Key (RUN) to auto start Programs on system start up
Creates system tray popups, messages, errors and security warnings
Adds a Registry Key (RUNONCE) to auto start Programs on system start up
Found on infected systems and resists interrogation by security products
The Process is polymorphic and can change its structure
Can Send email using SMTP protocols
This Process sends MIME Email
This Process Contains User Mode Rootkit Functionality and can hide itself from the running process list
Registers a Dynamic Link Library File
Modifies the Windows Host File which could be used to stop you visiting specific web sites by redirecting you to alternative addresses without you knowing
Executes a Process
Can communicate with other computer systems using HTTP protocols
Writes to another Process's Virtual Memory (Process Hijacking)
This process creates other processes on disk
Looks at the contents of the autoexec.bat file
Reads email address and phone book details
Visits web sites on your PC without you knowing

AD.EXE has been the subject of the following behavior:

Created as a process on disk
Executed as a Process
Added as a Registry auto start to load Program on Boot up
Has code inserted into its Virtual Memory space by other programs
Terminated as a Process
Registered as a Dynamic Link Library File
Deleted as a process from disk

Country Of Origin

The filename AD.EXE was first seen on May 14 2007 in the following geographical regions of the Webroot community:

The United States on May 14 2007
Canada on May 14 2007
China on Oct 9 2007
Spain on Oct 9 2007
on May 8 2008
Malaysia on May 8 2008
France on Jul 30 2008
Taiwan on Jul 30 2008
South Africa on Nov 9 2011
Netherlands on May 24 2012

File Name Aliases

AD.EXE can also use the following file names:

SAMPLE.EXE
JJJJ.EXE
AFFF.EXE
ADFA.EXE
CBB7.EXE
AFED.EXE
CDC9.EXE
E4AF.EXE
CAFB.EXE
HFLPG.EXE
LJTSYWAG.EXE
TIRQVAO.EXE
TLXVZRQ.EXE
UIHLVEK.EXE
ZNWZBH.EXE
GFEQLA.EXE
PFZBR.EXE
DQEFLXUL.EXE
JRYQUY.EXE
HGONNOD.EXE
ECBE.EXE
QAZTTTU.EXE
X3[n].EXE
AD[1].EXE
AD[2].EXE
AD[3].EXE
F.EXE
B.EXE
A.EXE
C.EXE
C3.EXE
12.EXE
ED.EXE
B3.EXE
X3.EXE
A7.EXE
C476.EXE
C4C4.EXE
AE39.EXE
A7D4.EXE
F9D8.EXE
E6E5.EXE
A247.EXE
F9C8.EXE
A88D.EXE
F90D.EXE
B385.EXE
D124.EXE
CE55.EXE
E629.EXE
F316.EXE
BD93.EXE
A6F8.EXE
D8B1.EXE
F3A2.EXE
CC67.EXE
A5C0.EXE
AB63.EXE

Filesizes

The following file size has been seen:

487,428 bytes
210,944 bytes
344,263 bytes
8,702,776 bytes
409,288 bytes
33,280 bytes
7,132 bytes

File Type

The filename AD.EXE is used by multiple object types including executable programs,objects,objects.

File Activity

One or more files with the name AD.EXE creates, deletes, copies or moves the following files and folders:

Opens/modifes c:\autoexec.bat
Copies filec:\windows\system32\drivers\beep.sys to c:\docume~1\user\locals~1\temp\C.tmp
Creates c:\windows\system32\drivers\beep.sys
Copies filec:\docume~1\user\locals~1\temp\C.tmp to c:\windows\system32\drivers\beep.sys
Deletes c:\docume~1\user\locals~1\temp\C.tmp
Copies filec:\windows\system32\drivers\null.sys to c:\docume~1\user\locals~1\temp\11.tmp
Creates c:\windows\system32\drivers\null.sys
Copies filec:\docume~1\user\locals~1\temp\11.tmp to c:\windows\system32\drivers\null.sys
Deletes c:\docume~1\user\locals~1\temp\11.tmp
Creates c:\windows\system32\drivers\glaide32.sys
Deletes c:\yole.exe
Moves c:\yole.exe to c:\docume~1\user\locals~1\temp\19.tmp
Creates c:\windows\inform.dat
Creates c:\windows\system32\xd.txt
Deletes c:\windows\system32\di1.gif
Deletes c:\windows\system32\dr1.gif
Deletes c:\windows\system32\cookie1.dat
Deletes c:\windows\system32\boa1.dat
Deletes c:\windows\system32\cs.dat
Deletes c:\windows\system32\bb1.dat
Deletes c:\windows\system32\ps1.dat
Deletes c:\windows\system32\rc.dat
Deletes c:\windows\system32\tb.dr
Creates c:\windows\system32\ritz8.dll

Website Activity

One or more files with the name AD.EXE interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.

fdvapsgmfr .net / progs / luagqdak / wyibby .php?adv=adv563
fdvapsgmfr .net / progs / luagqdak / yflhrol .php
fdvapsgmfr .net / progs / luagqdak / lrxherblpj .php
fdvapsgmfr .net / progs / luagqdak / mpvspl .php
fdvapsgmfr .net / progs / luagqdak / ouakgqantq .php
fdvapsgmfr .net / progs / luagqdak / vbhrbkuir .php
Port 80 IP:195.93.218.137
Port 80 IP:208.66.194.22

Help the Webroot Community to fight cyber crime

We are always looking for ways to improve the quality and speed of research to help us protect you from malicious software and cyber crime.

The filename referred to in this report is often associated with PC infections. If you have a program of this name on your PC and would like to help our research please tell us what you know in the form below:

I have this file on my PC and believe it is an infection
I have this file on my PC and think it has made my PC slower
My firewall asked if I wanted to let this file have access to the Internet
My PC will not work since I noticed this file on it
My antivirus detected this file but won't remove it
I know what this file is and believe it is a Safe program
I am the author of this file and would like to discuss how to have it reclassified as safe

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AD.EXE

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