ADW_UPDATE
RDN/Generic Downloader.x!jv (McAfee); Trojan.Dropper (Symantec); Trojan.Win32.Generic!BT (Sunbelt)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Adware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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
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 creates the following folders:
- %User Temp%\is-BJKQ9.tmp
- %User Temp%\is-Q82E3.tmp
- %User Temp%\is-Q82E3.tmp\_isetup
- %Program Files%\Retro PC Calculator
- %Start Menu%\Programs\Retro PC Calculator
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
Other System Modifications
This adware deletes the following files:
- %Start Menu%\Programs\Retro PC Calculator\Retro PC Calculator.pif
- %Start Menu%\Programs\Retro PC Calculator\Retro PC Calculator.url
(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\HKBS
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\HKBS
Check = "Check"
Dropping Routine
This adware drops the following files:
- %User Temp%\is-bjkq9.tmp\{malware file name}.tmp
- %User Temp%\is-Q82E3.tmp\_isetup\_shfoldr.dll
- %Program Files%\Retro PC Calculator\is-2UI1S.tmp
- %Program Files%\Retro PC Calculator\is-7JBR4.tmp
- %Start Menu%\Programs\Retro PC Calculator\Retro PC Calculator.lnk
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
This report is generated via an automated analysis system.
SOLUTION
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_LOCAL_MACHINE\Software
- HKBS
Step 3
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_LOCAL_MACHINE\SOFTWARE\HKBS
- Check = "Check"
Step 4
Search and delete these components
- %User Temp%\is-bjkq9.tmp\{malware file name}.tmp
- %User Temp%\is-Q82E3.tmp\_isetup\_shfoldr.dll
- %Program Files%\Retro PC Calculator\is-2UI1S.tmp
- %Program Files%\Retro PC Calculator\is-7JBR4.tmp
- %Start Menu%\Programs\Retro PC Calculator\Retro PC Calculator.lnk
Step 5
Search and delete these folders
- %User Temp%\is-BJKQ9.tmp
- %User Temp%\is-Q82E3.tmp
- %User Temp%\is-Q82E3.tmp\_isetup
- %Program Files%\Retro PC Calculator
- %Start Menu%\Programs\Retro PC Calculator
Step 6
Scan your computer with your Trend Micro product to delete files detected as ADW_UPDATE. 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
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.
- %Start Menu%\Programs\Retro PC Calculator\Retro PC Calculator.pif
- %Start Menu%\Programs\Retro PC Calculator\Retro PC Calculator.url
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