ADW_BRANTALL
TrojanDownloader:Win32/Brantall.C (Microsoft); InstallBrain (fs) (Sunbelt)
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: Adware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This adware 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
718,720 bytes
EXE
No
19 Jun 2014
Drops files, Connects to URLs/IPs
Arrival Details
This adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This adware drops the following copies of itself into the affected system:
- %User Temp%\PC Performer613879.exe
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It creates the following folders:
- %All Users Profile%\IBUpdaterService
- %User Temp%\ibtmp90bb489 - deleted afterwards
- %User Temp%\ibtmp90bb489\config - deleted afterwards
- %User Temp%\ibtmp90bb489\config\events - deleted afterwards
- %User Temp%\ibtmp90bb489\config\conditions - deleted afterwards
(Note: %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Other System Modifications
This adware adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows Script\Settings
HKEY_CURRENT_USER\Software\Microsoft\
Windows Script
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows Script\Settings
JITDebug = "0"
Dropping Routine
This adware drops the following files:
- %User Temp%\ibtmp90bb489\config\conditions\conditions.js - deleted afterwards
- %User Temp%\ibtmp90bb489\config\events\events.js - deleted afterwards
- %User Temp%\ibtmp90bb489\intallLog - deleted afterwards
- %User Profile%\IBUpdaterService\repository.xml
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %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.)
Download Routine
This adware saves the files it downloads using the following names:
- %User Temp%\ConduitChecker.exe - also detected as ADW_BRANTALL
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Other Details
This adware connects to the following possibly malicious URL:
- http://api.{BLOCKED}o.com/utils/dns?cid={random}
- http://www.{BLOCKED}tech.com/
- http://{BLOCKED}-182385724-1591972470.us-east-1.elb.{BLOCKED}aws.com/service/country.php
- http://www.{BLOCKED}tech.com/service/country.php
- http://www.{BLOCKED}tech.com/files/components/conduit_checker.exe - download file also detected as ADW_BRANTALL
NOTES:
It notifies the following URLs for the installation:
- http://api.{BLOCKED}o.com/track/ib-start?cid={random}
- http://{BLOCKED}l.{BLOCKED}o.com/installer/{random characters}
- http://api.{BLOCKED}o.com/track/ib-install?cid={random}&componentid={random}
- http://api.{BLOCKED}o.com/track/ib-finish?cid={random}
SOLUTION
9.700
1.502.26
21 Apr 2014
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
Delete this registry key
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 Script
- Windows Script
Step 3
Search and delete these folders
- %All Users Profile%\IBUpdaterService
Step 4
Scan your computer with your Trend Micro product to delete files detected as ADW_BRANTALL. 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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