Threat Encyclopedia

Selected viruses, spyware, and other threats: sorted alphabetically

Win32/Bagle.AX

Win32/Bagle.AX is a mass-mailing worm spreading via e-mail, shared folders and file sharing peer-to-peer networks.

Note: In the following text, %windir% denotes Windows directory (e.g. C:\WINDOWS) and %system% denotes Windows System directory (e.g. C:\WINDOWS\SYSTEM32) as they differ on various versions of Microsoft Windows.

Details

When activated, it copies itself into these files:

%SysDir%\sysformat.exe
%SysDir%\sysformat.exeopen
%SysDir%\sysformat.exeopenopen

It adds the following entry to the registry in order to get executed after reboot:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] "sysformat"="%SysDir%\sysformat.exe"

It searches the disk for folders with names containing the string "shar" and copies itself into them under these names:

1.exe
2.exe
3.exe
4.exe
5.exe
6.exe
7.exe
8.exe
9.exe
10.exe
Ahead Nero 7.exe
Windown Longhorn Beta Leak.exe
Opera 8 New!.exe
XXX hardcore images.exe
WinAmp 6 New!.exe
WinAmp 5 Pro Keygen Crack Update.exe
Adobe Photoshop 9 full.exe
Matrix 3 Revolution English Subtitles.exe
ACDSee 9.exe

The worm tries to protect itself by terminating the following processes:

mcagent.exe
mcvsshld.exe
mcshield.exe
mcvsescn.exe
mcvsrte.exe
_DefWatch.exe
Rtvscan.exe
ccEvtMgr.exe
NISUM.EXE
ccPxySvc.exe
navapsvc.exe
NPROTECT.EXE
nopdb.exe
ccApp.exe
Avsynmgr.exe
VsStat.exe
Vshwin32.exe
alogserv.exe
RuLaunch.exe
Avconsol.exe
PavFires.exe
FIREWALL.EXE
ATUPDATER.EXE
LUALL.EXE
DRWEBUPW.EXE
AUTODOWN.EXE
NUPGRADE.EXE
OUTPOST.EXE
ICSSUPPNT.EXE
ICSUPP95.EXE
ESCANH95.EXE
AVXQUAR.EXE
ESCANHNT.EXE
ATUPDATER.EXE
AUPDATE.EXE
AUTOTRACE.EXE
AUTOUPDATE.EXE
AVXQUAR.EXE
AVWUPD32.EXE
AVPUPD.EXE
CFIAUDIT.EXE
UPDATE.EXE
NUPGRADE.EXE
MCUPDATE.EXE
pavsrv50.exe
AVENGINE.EXE
APVXDWIN.EXE
pavProxy.exe
navapw32.exe
navapsvc.exe
ccProxy.exe
navapsvc.exe
NPROTECT.EXE
SAVScan.exe
SNDSrvc.exe
symlcsvc.exe
LUCOMS~1.EXE
blackd.exe
bawindo.exe
FrameworkService.exe
VsTskMgr.exe
SHSTAT.EXE
UpdaterUI.exe

Spreading

It collects e-mail addresses from files on the infected computer. It avoids sending itself to addresses containing any of the following strings:

@microsoft
rating@
f-secur
news
update
anyone@
bugs@
contract@
feste
gold-certs@
help@
info@
nobody@
noone@
kasp
admin
icrosoft
upport
ntivi
unix
bsd
linux
listserv
certific
sopho
@foo
@iana
free-av
@messagelab
winzip
google
winrar
samples
abuse
panda
cafee
spam
pgp
@avp.
noreply
local
root@
postmaster@

NOD32 detected Win32/Bagle.AX using the Advanced Heuristics. Detection using a sample is added since version 1.985.