ADW_IBRYTE.A
PUP-FST. (McAfee); Trojan.Gen.2 (Symantec); AdWare.Win32.iBryte.jls (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)
Windows
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:
- %Program Files%\Search Extensions
- %Program Files%\Search Extensions\Resources
- %User Profile%\My\Keys
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %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.)
Other System Modifications
This adware deletes the following files:
- %Windows%\Tasks\Temp{48246698-28bd-4972-b23f-2cc9df24a1b3}.job
- %Windows%\Tasks\Temp{94ab324f-5a68-47b9-b106-d77fd68d0338}.job
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
RocketTab
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
SystemCertificates\ROOT\Certificates\
D41B97364E47F7EB7E19086613B8C6869847CE3B
HKEY_LOCAL_MACHINE\SOFTWARE\RocketTab
HKEY_CURRENT_USER\SOFTWARE\Search Extensions
HKEY_CURRENT_USER\SOFTWARE\RocketTabInstalled
HKEY_CURRENT_USER\software\rttasks
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
SystemCertificates\ROOT\Certificates\
75E557A9435E181416C8D5DE4BAFC88122F4B139
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
ESENT\Process\Client
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
ESENT\Process\Client\
DEBUG
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
FiddlerCore\Dynamic
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
SystemCertificates\ROOT\Certificates\
A730149AE2F17BF871EF180641405C025D415A0C
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
RocketTab
InstallDate = "20150201"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
RocketTab
DisplayName = "RocketTab"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
RocketTab
DisplayIcon = "%Program Files%\Search Extensions\uninstall.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
RocketTab
Publisher = "RocketTab"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
RocketTab
InstallLocation = "%Program Files%\Search Extensions"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
RocketTab
UninstallString = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
RocketTab
EstimatedSize = "12c"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
SystemCertificates\ROOT\Certificates\
D41B97364E47F7EB7E19086613B8C6869847CE3B
Blob = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\RocketTab
userid = "8a5c8fd6-6095-4c32-bdfa-136abe2d9d20"
HKEY_LOCAL_MACHINE\SOFTWARE\RocketTab
uc = "20150303"
HKEY_LOCAL_MACHINE\SOFTWARE\RocketTab
implementationid = "browsersafeguard-dl"
HKEY_CURRENT_USER\Software\Search Extensions
RocketTab = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
SystemCertificates\ROOT\Certificates\
75E557A9435E181416C8D5DE4BAFC88122F4B139
Blob = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
FiddlerCore\Dynamic
Attached = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
SystemCertificates\ROOT\Certificates\
A730149AE2F17BF871EF180641405C025D415A0C
Blob = "{random values}"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ProxyEnable = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
EventMessageFile = "%System%\ESENT.dll"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
CategoryMessageFile = "%System%\ESENT.dll"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
CategoryCount = "1"
(Note: The default value data of the said registry entry is 10.)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
TypesSupported = "7"
(Note: The default value data of the said registry entry is 7.)
Dropping Routine
This adware drops the following files:
- %User Temp%\System.Data.SQLite.dll
- %Program Files%\c0568f1e-0e42-4f76-bc9a-f46a03664c52.tmp
- %Program Files%\Search Extensions\certmanager.exe
- %Program Files%\Search Extensions\Client.exe
- %Program Files%\Search Extensions\makecert.exe
- %Program Files%\Search Extensions\Resources\certutil.exe
- %Program Files%\Search Extensions\Resources\libnspr4.dll
- %Program Files%\Search Extensions\Resources\libplc4.dll
- %Program Files%\Search Extensions\Resources\libplds4.dll
- %Program Files%\Search Extensions\Resources\nss3.dll
- %Program Files%\Search Extensions\Resources\smime3.dll
- %Program Files%\Search Extensions\Resources\softokn3.dll
- %Program Files%\Search Extensions\uninstall.exe
- %Windows%\Tasks\RocketTab.job
- %Windows%\Tasks\RocketTab Update Task.job
- %Program Files%\Search Extensions\config.dat
- %User Profile%\Certificates\D41B97364E47F7EB7E19086613B8C6869847CE3B
- %Program Files%\Search Extensions\TrustedRoot.cer
- %User Profile%\Certificates\1028E474DF022F966C1B83437AC7CFEA5C41EFB9
- %User Profile%\Keys\3722C4A360670F2F4A4A1E794F959C8C84FF1EA8
- %User Profile%\Certificates\75E557A9435E181416C8D5DE4BAFC88122F4B139
- %User Profile%\Certificates\A730149AE2F17BF871EF180641405C025D415A0C
(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.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %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.)
Other Details
This adware connects to the following possibly malicious URL:
- {BLOCKED}.207.244
- {BLOCKED}.172.12
- {BLOCKED}.228.240
- {BLOCKED}.181.61
- {BLOCKED}.119.179
- {BLOCKED}0.1
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\Microsoft\Windows\CurrentVersion\Uninstall
- RocketTab
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates
- D41B97364E47F7EB7E19086613B8C6869847CE3B
- In HKEY_LOCAL_MACHINE\SOFTWARE
- RocketTab
- In HKEY_CURRENT_USER\SOFTWARE
- Search Extensions
- In HKEY_CURRENT_USER\SOFTWARE
- RocketTabInstalled
- In HKEY_CURRENT_USER\software
- rttasks
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates
- 75E557A9435E181416C8D5DE4BAFC88122F4B139
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ESENT\Process
- Client
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ESENT\Process\Client
- DEBUG
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\FiddlerCore
- Dynamic
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates
- A730149AE2F17BF871EF180641405C025D415A0C
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\Microsoft\Windows\CurrentVersion\Uninstall\RocketTab
- InstallDate = "20150201"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\RocketTab
- DisplayName = "RocketTab"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\RocketTab
- DisplayIcon = "%Program Files%\Search Extensions\uninstall.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\RocketTab
- Publisher = "RocketTab"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\RocketTab
- InstallLocation = "%Program Files%\Search Extensions"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\RocketTab
- UninstallString = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\RocketTab
- EstimatedSize = "12c"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\D41B97364E47F7EB7E19086613B8C6869847CE3B
- Blob = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\RocketTab
- userid = "8a5c8fd6-6095-4c32-bdfa-136abe2d9d20"
- In HKEY_LOCAL_MACHINE\SOFTWARE\RocketTab
- uc = "20150303"
- In HKEY_LOCAL_MACHINE\SOFTWARE\RocketTab
- implementationid = "browsersafeguard-dl"
- In HKEY_CURRENT_USER\Software\Search Extensions
- RocketTab = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\75E557A9435E181416C8D5DE4BAFC88122F4B139
- Blob = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\FiddlerCore\Dynamic
- Attached = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\A730149AE2F17BF871EF180641405C025D415A0C
- Blob = "{random values}"
Step 4
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- ProxyEnable = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
- From: EventMessageFile = "%System%\ESENT.dll"
To: EventMessageFile = ""{random values}""
- From: EventMessageFile = "%System%\ESENT.dll"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
- From: CategoryMessageFile = "%System%\ESENT.dll"
To: CategoryMessageFile = ""{random values}""
- From: CategoryMessageFile = "%System%\ESENT.dll"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
- From: CategoryCount = "1"
To: CategoryCount = ""10""
- From: CategoryCount = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
- From: TypesSupported = "7"
To: TypesSupported = ""7""
- From: TypesSupported = "7"
Step 5
Search and delete these components
- %User Temp%\System.Data.SQLite.dll
- %Program Files%\c0568f1e-0e42-4f76-bc9a-f46a03664c52.tmp
- %Program Files%\Search Extensions\certmanager.exe
- %Program Files%\Search Extensions\Client.exe
- %Program Files%\Search Extensions\makecert.exe
- %Program Files%\Search Extensions\Resources\certutil.exe
- %Program Files%\Search Extensions\Resources\libnspr4.dll
- %Program Files%\Search Extensions\Resources\libplc4.dll
- %Program Files%\Search Extensions\Resources\libplds4.dll
- %Program Files%\Search Extensions\Resources\nss3.dll
- %Program Files%\Search Extensions\Resources\smime3.dll
- %Program Files%\Search Extensions\Resources\softokn3.dll
- %Program Files%\Search Extensions\uninstall.exe
- %Windows%\Tasks\RocketTab.job
- %Windows%\Tasks\RocketTab Update Task.job
- %Program Files%\Search Extensions\config.dat
- %User Profile%\Certificates\D41B97364E47F7EB7E19086613B8C6869847CE3B
- %Program Files%\Search Extensions\TrustedRoot.cer
- %User Profile%\Certificates\1028E474DF022F966C1B83437AC7CFEA5C41EFB9
- %User Profile%\Keys\3722C4A360670F2F4A4A1E794F959C8C84FF1EA8
- %User Profile%\Certificates\75E557A9435E181416C8D5DE4BAFC88122F4B139
- %User Profile%\Certificates\A730149AE2F17BF871EF180641405C025D415A0C
Step 6
Search and delete these folders
- %Program Files%\Search Extensions
- %Program Files%\Search Extensions\Resources
- %User Profile%\My\Keys
Step 7
Scan your computer with your Trend Micro product to delete files detected as ADW_IBRYTE.A. 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 8
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.
- %Windows%\Tasks\Temp{48246698-28bd-4972-b23f-2cc9df24a1b3}.job
- %Windows%\Tasks\Temp{94ab324f-5a68-47b9-b106-d77fd68d0338}.job
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