For the week of
09 Jun 2011
Threat
1
Conficker worm still dangerous
Threat Name:
Mal/Conficker-A
Users at Risk:
Windows users
Also Known As:
WORM_DOWNAD.AD
W32/Conficker.worm
Worm:Win32/Conficker.gen!A
Worm:W32/Downadup
Net-Worm.Win32.Kido
Removal Instructions:
Mal/Conficker-A can be removed with either Sophos Anti-Virus or the standalone Conficker removal tool.
For a more detailed guide to cleaning up a Conficker infection on a Windows network, please refer to the
knowledgebase article.
About:
Mal/Conficker-A is a worm for the Windows platform that spreads through Windows file shares protected with weak passwords (or to which a logged on domain administrator has access). Conficker spreads by copying itself to removable storage devices and by exploiting the MS08-067 Windows Server service vulnerability.
Mal/Conficker-A will attempt to copy itself to the following location:
\
(e.g. C:\Windows\system32\zdtnx.g or C:\Windows\system32\kdcktv.dll)
This file is set up to run as a service, also using a random name, when Windows starts. Mal/Conficker-A modifies permissions on the service registry entries so that they are not visible to the user.
The registry entries added by Mal/Confiker-A are under:
HKLM\SYSTEM\CurrentControlSet\Services\
The random service name will also be added to the list of services referenced by:
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost\netsvcs
When spreading to removable media Mal/Conficker-A attempts to create the following hidden files:
\autorun.inf
\RECYCLER\S-x-x-x-xxx-xxx-xxx-x\.dll (where x represents a random digit)
Once installed Mal/Conficker-A will patch the netapi32.dll function NetpwPathCanonicalize in memory to disable the MS08-67 exploit that it uses to spread. Later versions of Mal/Conficker-A include a backdoor in this patch that allows the worm to extract URLs from incoming MS08-67 shellcode and download and execute files from them directly.
Recent variants of Mal/Conficker-A will create a named pipe at the following location:
\\.\pipe\System_7
Mal/Conficker-A will listen for URLs on this named pipe and will attempt to download and possibly execute files downloaded from such URLs.
Once active the worm will attempt to determine the public IP address of the infected computer by visiting one or more of the following websites:
www.whatsmyipaddress.com
www.getmyip.org
www.whatismyip.org
checkip.dyndns.org
The worm will also access one of more of the following sites:
www.myspace.com
www.ebay.com
www.msn.com
www.cnn.com
www.aol.com
When spreading to other computers on the network Mal/Conficker-A will attempt to access the ADMIN$ share using the following passwords:
99999999
9999999
999999
99999
9999
999
99
9
88888888
8888888
888888
88888
8888
888
88
8
77777777
7777777
777777
77777
7777
777
77
7
66666666
6666666
666666
66666
6666
666
66
6
55555555
5555555
555555
55555
5555
555
55
5
44444444
4444444
444444
44444
4444
444
44
4
33333333
3333333
333333
33333
3333
333
33
3
22222222
2222222
222222
22222
2222
222
22
2
11111111
1111111
111111
11111
1111
111
11
1
00000000
0000000
00000
0000
000
00
0987654321
987654321
87654321
7654321
654321
54321
4321
321
21
12
fuck
zzzzz
zzzz
zzz
xxxxx
xxxx
xxx
qqqqq
qqqq
qqq
aaaaa
aaaa
aaa
sql
file
web
foo
job
home
work
intranet
controller
killer
games
private
market
coffee
cookie
forever
freedom
student
account
academia
files
windows
monitor
unknown
anything
letitbe
letmein
domain
access
money
campus
explorer
exchange
customer
cluster
nobody
codeword
codename
changeme
desktop
security
secure
public
system
shadow
office
supervisor
superuser
share
super
secret
server
computer
owner
backup
database
lotus
oracle
business
manager
temporary
ihavenopass
nothing
nopassword
nopass
Internet
internet
example
sample
love123
boss123
work123
home123
mypc123
temp123
test123
qwe123
abc123
pw123
root123
pass123
pass12
pass1
admin123
admin12
admin1
password123
password12
password1
default
foobar
foofoo
temptemp
temp
testtest
test
rootroot
root
adminadmin
mypassword
mypass
pass
Login
login
Password
password
passwd
zxcvbn
zxcvb
zxccxz
zxcxz
qazwsxedc
qazwsx
q1w2e3
qweasdzxc
asdfgh
asdzxc
asddsa
asdsa
qweasd
qwerty
qweewq
qwewq
nimda
administrator
Admin
admin
a1b2c3
1q2w3e
1234qwer
1234abcd
123asd
123qwe
123abc
123321
12321
123123
1234567890
123456789
12345678
1234567
123456
12345
1234
123
Mal/Conficker-A will attempt to block access to websites that have any the following strings in their domain name:
cert.
sans.
bit9.
vet.
avg.
avp.
ca.
nai.
windowsupdate
wilderssecurity
threatexpert
castlecops
spamhaus
cpsecure
arcabit
emsisoft
sunbelt
securecomputing
rising
prevx
pctools
norman
k7computing
ikarus
hauri
hacksoft
gdata
fortinet
ewido
clamav
comodo
quickheal
avira
avast
esafe
ahnlab
centralcommand
drweb
grisoft
eset
nod32
f-prot
jotti
kaspersky
f-secure
computerassociates
networkassociates
etrust
panda
sophos
trendmicro
mcafee
norton
symantec
microsoft
defender
rootkit
malware
spyware
Threat
2
Fake antivirus targets Mac users
Threat Name:
OSX/FakeAVDl-A
Users at Risk:
Mac OS X users
Also Known As:
AVP Trojan-Downloader.OSX.FavDonw.a
Symantec MACDefender
About:
When accessing popular image hits, SEO poisoning redirects user to a FakeAV "scan" javascript which reports "your computer may be infected" in a Finder-like web browser window.
A zip file is then downloaded in the background and an PKG-style installer app is launched (automatically if Safari is being used and "open safe files" is left enabled). When the user OKs the install, the installer then downloads the FakeAV app from an IP-based location, using an authentication string also used for accessing the credit card payment data embedded in the FakeAV software.
The FakeAV app is then installed in the /Applications folder and launched. Some names used by the FakeAV software:
anti-malware.zip
avSetup.pkg
MacGuard.app
The FakeAV then repeats the "detection" alert, while also opening the referenced auto-launch web pages in the system's default web browser.
The FakeAV then prompts the user to register the software to "clean up" the "infections", bringing up an online payment window where the user can pay by credit card for a one year, two year, or lifetime license while providing full contact information to the authors.
Earlier versions of this FakeAV family contained the FakeAV inside a downloaded mpkg installer instead of downloading the FakeAV from within the installer when it is run.
The installers download additional files from:
69.50.214.54
69.50.214.57
46.161.20.36
95.64.55.5
91.213.217.30
91.200.241.200
86.55.210.102
These files are detected as:
OSX/FakeAV-DMP
OSX/FakeAV-DMU
OSX/FakeAV-DOE
OSX/FakeAV-DOY
OSX/FakeAvIs-A
OSX/FakeAvIs-B
OSX/FakeAVSc-A
OSX/FakeAVZp-B
OSX/FakeAvZp-C
Also related to Windows FakeAV:
Mal/FakeAV-FS
This family of FakeAV will also launch a browser window automatically and display the following sites:
gay DOT porn DOT com
buy-viagra-now DOT net
fitish DOT com
www DOT gay DOT com
www DOT porn DOT com
www DOT freebdsmgalleries DOT com
Threat
3
Spyware embedded in notification spam
Threat Name:
Troj/Agent-RNY
Users at Risk:
Windows users
Also Known As:
Avira TR/Spy.ZBot.bnvn
AVP Trojan-Spy.Win32.Zbot.bnvn
McAfee PWS-Spyeye.ax Trojan
About:
Troj/Agent-RNY is normally found in spam email attachments with subjects such as:
"E - CARD" or "DHL id"
and attachment names such as:
"e-card.pif" or "DHL.pif"
When executeded, Troj/Agent-RNY installs itself to the following location:
\Application Data\.exe
Troj/Agent-RNY attempts to connect via HTTP to the following locations:
211 . 154 . 153 . 49
www . net . com
Troj/Agent-RNY may also attempt to disable security software.