WORM_DORKBOT.ACC
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Worm
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Propagates via removable drives, Downloaded from the Internet
This worm arrives by connecting affected removable drives to a system. It may be unknowingly downloaded by a user while visiting malicious websites.
It drops copies of itself into all the removable drives connected to an affected system.
It deletes itself after execution.
TECHNICAL DETAILS
150,154 bytes
EXE
Yes
19 Jul 2011
Compromises system security, Steals information
Arrival Details
This worm arrives by connecting affected removable drives to a system.
It may be unknowingly downloaded by a user while visiting malicious websites.
Installation
This worm drops the following copies of itself into the affected system:
- %User Profile%\Application Data\{random}.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It injects threads into the following normal process(es):
- explorer.exe
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKCU\Software\Microsoft\
Windows\CurrentVersion\Run
{random} = "%User Profile%\Application Data\{random}.exe"
Propagation
This worm drops copies of itself into all the removable drives connected to an affected system.
Backdoor Routine
This worm connects to the following URL(s) to send and receive commands from a remote malicious user:
- niidea.net
- ngr.hostname.ns1.name
- ngrnd.scrapping.cc
- ngrnd.zapto.org
- ngr.dns02.ns2.name
Other Details
This worm connects to the following URL(s) to get the affected system's IP address:
- http://api.wipmania.com
It deletes itself after execution.
NOTES:
It monitors the user's browsing activities. It gathers the user's login ID, password, and email when the site accessed by the user contains the following strings:
- *&password=*
- *&txtPassword=*
- *.moneybookers.*/*login.pl
- *1and1.com/xml/config*
- *4shared.com/login*
- *:2082/login*
- *:2083/login*
- *:2086/login*
- *:2222/CMD_LOGIN*
- *alertpay.com/login*
- *aol.*/*login.psp*
- *bcointernacional*login*
- *bigstring.*/*index.php*
- *clave=*
- *depositfiles.*/*/login*
- *dotster.com/*login*
- *dyndns*/account*
- *enom.com/login*
- *facebook.*/login.php*
- *fastmail.*/mail/*
- *fileserv.com/login*
- *filesonic.com/*login*
- *FLN-Password=*
- *freakshare.com/login*
- *gmx.*/*FormLogin*
- *godaddy.com/login*
- *google.*/*ServiceLoginAuth*
- *hackforums.*/member.php
- *hotfile.com/login*
- *letitbit.net*
- *login.live.*/*post.srf*
- *login.Pass=*
- *login.yahoo.*/*login*
- *login_pass=*
- *login_password=*
- *LoginPassword=*
- *loginUserPassword=*
- *mediafire.com/*login*
- *megaupload.*/*login*
- *members*.iknowthatgirl*/members*
- *members.brazzers.com*
- *moniker.com/*Login*
- *namecheap.com/*login*
- *netflix.com/*ogin*
- *netload.in/index*
- *no-ip*/login*
- *officebanking.cl/*login.asp*
- *oron.com/login*
- *pas=*
- *pass=*
- *Passwd=*
- *Password=*
- *password]=*
- *paypal.*/webscr?cmd=_login-submit*
- *runescape*/*weblogin*
- *screenname.aol.*/login.psp*
- *secure.logmein.*/*logincheck*
- *sendspace.com/login*
- *service=youtube*
- *signin.ebay*SignIn
- *sms4file.com/*/signin-do*
- *speedyshare.com/login*
- *steampowered*/login*
- *TextfieldPassword=*
- *thepiratebay.org/login*
- *torrentleech.org/*login*
- *twitter.com/sessions
- *txtpass=*
- *uploaded.to/*login*
- *uploading.com/*login*
- *vip-file.com/*/signin-do*
- *webnames.ru/*user_login*
- *what.cd/login*
- *whcms*dologin*
- *youporn.*/login*
It attempts to steal user credentials used in the following sites:
- 1and1
- 4shared
- Alertpay
- AOL
- Bcointernacional
- BigString
- Brazzers
- clave
- Depositfiles
- Dotster
- DynDNS
- eBay
- Enom
- Fastmail
- Fileserve
- Filesonic
- FLN-Password
- FLN-UserName
- Freakshare
- Gmail
- GMX
- Godaddy
- Hackforums
- Hotfile
- IKnowThatGirl
- Letitbit
- Live
- LoginPassword
- LoginUserName
- LogMeIn
- Mediafire
- Megaupload
- Moneybookers
- Moniker
- Namecheap
- Netflix
- Netload
- NoIP
- numeroTarjeta
- OfficeBanking
- Oron
- PayPal
- Runescape
- Sendspace
- Sms4file
- Speedyshare
- Steam
- Thepiratebay
- Torrentleech
- Uploaded
- Uploading
- Vip-file
- Webnames
- Whatcd
- Yahoo
- YouPorn
- YouTube
It blocks users from accessing websites with the following strings:
- avast.
- avg.
- avira.
- bitdefender.
- bullguard.
- clamav.
- comodo.
- emsisoft.
- eset.
- f-secure.
- fortinet.
- garyshood.
- gdatasoftware.
- heck.tc
- iseclab.
- jotti.
- kaspersky.
- lavasoft.
- malwarebytes.
- mcafee.
- norman.
- norton.
- novirusthanks.
- onecare.live.
- onlinemalwarescanner.
- pandasecurity.
- precisesecurity.
- sophos.
- sunbeltsoftware.
- symantec
- threatexpert.
- trendmicro.
- virscan.
- virus.
- virusbuster.nprotect.
- viruschief.
- virustotal.
- webroot.
It has the following backdoor capabilities:
- Block DNS
- Create processes
- Download other files
- Insert iframe tags into HTML files
- Join an IRC channel
- Log in to FTP sites
- Perfrom Slowloris, UDP, and SYN flooding
- Run Reverse Socks4 proxy server
- Send MSN Messenger messages
- Steal login credentials
- Update Itself
- Visit a website
It may also prevent users from using the following applications:
- cmd.exe
- ipconfig.exe
- regedit.exe
- regsvr32.exe
- rundll32.exe
- verclsid.exe
It hooks the following APIs to hide itself and to aid its routines:
- CopyFileA
- CopyFileW
- CreateFileA
- CreateFileW
- DeleteFileA
- DeleteFileW
- DnsQuery_A
- DnsQuery_W
- GetAddrInfoW
- HttpSendRequestA
- HttpSendRequestW
- InternetWriteFile
- LdrEnumerateLoadedModules
- LdrGetDllHandle
- LdrGetProcedureAddress
- LdrLoadDll
- MoveFileA
- MoveFileW
- NtEnumerateValueKey
- NtQueryDirectoryFile
- NtQueryInformationThread
- NtQueryInformationProcess
- NtQuerySystemInformation
- NtQueryVirtualMemory
- PR_Write
- RegCreateKeyExA
- RegCreateKeyExW
- RtlAnsiStringToUnicodeString
- URLDownloadToFileW
- URLDownloadToFileA
It drops shortcut files pointing to the copy of itself in removable drives. These dropped .LNK files use the names of the folders located on the said drives for their file names. It then sets the attributes of the original folders to Hidden to trick the user into clicking the .LNK files.
It sends messages that contain links to sites hosting remote copies of itself using the following instant-messaging (IM) applications:
- mIRC
- MSN Messenger
SOLUTION
9.300
8.298.06
19 Jul 2011
8.299.00
20 Jul 2011
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Scan your computer with your Trend Micro product and note files detected as WORM_DORKBOT.ACC
Step 3
Restart in Safe Mode
Step 4
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {random} = "%User Profile%\Application Data\{random}.exe"
- {random} = "%User Profile%\Application Data\{random}.exe"
Step 5
Search and delete the file detected as WORM_DORKBOT.ACC
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_DORKBOT.ACC. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
Step 7
Scan your computer with your Trend Micro product to delete files detected as WORM_DORKBOT.ACC. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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