TROJ_ISTBAR.RD
BrowserModifier:Win32/Istbar.F (Microsoft); Adware.Istbar (Symantec); Trojan-Downloader.Win32.IstBar.pc (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Downloader.IstBar.NAF (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Other System Modifications
This Trojan deletes the following files:
- %Program Files%\ISTsvc\istsvc.exe
- %Program Files%\ISTbar\istbar.dll
- %Program Files%\ISTbar\istba2.dll
- %Program Files%\ISTbar\istbarcm.dll
- %Program Files%\ISTbar\istbarc2.dll
- %Program Files%\YourSiteBar\ysb.dll
- %Program Files%\YourSiteBar\ys2.dll
- %Program Files%\SaferScan\saferscan.exe
- %Program Files%\SaferScan\uninstall.exe
- %Start Menu%\Programs\SaferScan\SaferScan.lnk
- %Program Files%\Power Scan\powerscan.exe
- %Program Files%\Power Scan\uninstall.exe
- %Start Menu%\Programs\Power Scan\Power Scan.lnk
- %System%\dun.exe
- %Windows%\switpa.exe
- %System%\lmf32v.dll
- %Windows%\ptcore.exe
- %System%\HyperLinker.exe
- %System%\PreUninstall.exe
- %System%\uninst.exe
- %System%\uninst.log
- %System%\lmdv.bin
- %Windows%\nem219.dll
- %Program Files%\Internet Optimizer\actalert.exe
- %Program Files%\Internet Optimizer\optimize.exe
- %Program Files%\Internet Optimizer\update\actalert.exe
- %System%\msbe.dll
- %System%\exdl.exe
- %System%\exul.exe
- %System%\msxct.exe
- %Windows%\zeta.exe
- %Program Files%\180Solutions\msbb.exe
- %Desktop%\Sportsinteraction.com - Bet on Sports!.lnk
- %Windows%\sports.ico
- %Windows%\twaintec.dll
- %Windows%\localNRD.dll
- %Windows%\multimpp.dll
- %Windows%\conscorr.exe
- %Windows%\conscorr.ini
- %Windows%\preInsln.exe
- %Windows%\preInMPP.exe
- reInMPP.exe
It deletes the following folders:
- %Program Files%\ISTsvc
- %Program Files%\ISTbar
- %Program Files%\YourSiteBar
- %Program Files%\SaferScan
- %Start Menu%\Programs\SaferScan
- %Program Files%\Power Scan
- %Start Menu%\Programs\Power Scan
- %Program Files%\Sidefind\update
- %Program Files%\SideFind
- %System%\DealHelper
- %System%\Newmsrdk
- %Program Files%\OfferAgent
- %Program Files%\Internet Optimizer\update
- %Program Files%\Internet Optimizer
- %Program Files%\VVSN
- %Program Files%\BullsEye Network
- %Program Files%\180solutions
- %Program Files%\180searchassistant
- %Program Files%\180Solutions
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Dropping Routine
This Trojan drops the following files:
- %Program Files%\SurfAccuracy\SAccU.exe
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.{BLOCKED}h.com/ist/scripts/log_uninstalls.php?{random characters}
- http://www.{BLOCKED}curacy.com/sacc/updater.php?f=uninstaller
This report is generated via an automated analysis system.
SOLUTION
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Search and delete this file
- %Program Files%\SurfAccuracy\SAccU.exe
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_ISTBAR.RD. 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 4
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %Program Files%\ISTsvc\istsvc.exe
- %Program Files%\ISTbar\istbar.dll
- %Program Files%\ISTbar\istba2.dll
- %Program Files%\ISTbar\istbarcm.dll
- %Program Files%\ISTbar\istbarc2.dll
- %Program Files%\YourSiteBar\ysb.dll
- %Program Files%\YourSiteBar\ys2.dll
- %Program Files%\SaferScan\saferscan.exe
- %Program Files%\SaferScan\uninstall.exe
- %Start Menu%\Programs\SaferScan\SaferScan.lnk
- %Program Files%\Power Scan\powerscan.exe
- %Program Files%\Power Scan\uninstall.exe
- %Start Menu%\Programs\Power Scan\Power Scan.lnk
- %System%\dun.exe
- %Windows%\switpa.exe
- %System%\lmf32v.dll
- %Windows%\ptcore.exe
- %System%\HyperLinker.exe
- %System%\PreUninstall.exe
- %System%\uninst.exe
- %System%\uninst.log
- %System%\lmdv.bin
- %Windows%\nem219.dll
- %Program Files%\Internet Optimizer\actalert.exe
- %Program Files%\Internet Optimizer\optimize.exe
- %Program Files%\Internet Optimizer\update\actalert.exe
- %System%\msbe.dll
- %System%\exdl.exe
- %System%\exul.exe
- %System%\msxct.exe
- %Windows%\zeta.exe
- %Program Files%\180Solutions\msbb.exe
- %Desktop%\Sportsinteraction.com - Bet on Sports!.lnk
- %Windows%\sports.ico
- %Windows%\twaintec.dll
- %Windows%\localNRD.dll
- %Windows%\multimpp.dll
- %Windows%\conscorr.exe
- %Windows%\conscorr.ini
- %Windows%\preInsln.exe
- %Windows%\preInMPP.exe
- reInMPP.exe
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