TSPY_LIMITAIL.RAC
Troj/MSIL-BBB (Sophos); Trojan.MSIL.Inject.auji (Kaspersky)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
996,864 bytes
EXE
Yes
03 Dec 2014
Arrival Details
This spyware 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 spyware drops the following copies of itself into the affected system and executes them:
- %Application Data%\Microsoft\ProfScv.exe
- %User Profile%\Templates\takshost.exe
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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.)
It creates the following folders:
- %User Temp%\screens
(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.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Application Experience = %Application Data%\Microsoft\AeLookupSvi.exe
Other System Modifications
This spyware adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\{initial malware file name w/o extension}
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\ProfSvc
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\{initial malware file name w/o extension}\
DEBUG
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\ProfSvc\
DEBUG
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\ProfSvc
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\{initial malware file name}\
DEBUG
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\takshost
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\takshost\
DEBUG
It adds the following registry entries:
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\ProfSvc\
DEBUG
Trace Level = ""
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\takshost\
DEBUG
Trace Level = ""
HKEY_LOCAL_MACHINE\Software\Microsoft\
ESENT\Process\{initial malware file name w/o extension}\
DEBUG
Trace Level = ""
Dropping Routine
This spyware drops the following files:
- %Application Data%\Microsoft\AeLookupSvi.exe
- %Application Data%\pid.txt
- %Application Data%\pidloc.txt
- %User Temp%\screens\screenshot{number}.jpeg
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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 Details
This spyware connects to the following possibly malicious URL:
- mail.{BLOCKED}tler.com
It deletes the initially executed copy of itself
SOLUTION
9.700
11.330.03
03 Dec 2014
11.331.00
03 Dec 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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Scan your computer with your Trend Micro product and note files detected as TSPY_LIMITAIL.RAC
Step 4
Restart in Safe Mode
Step 5
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
- Application Experience = %Application Data%\Microsoft\AeLookupSvi.exe
- Application Experience = %Application Data%\Microsoft\AeLookupSvi.exe
Step 6
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\ESENT\Process
- {initial malware file name w/o extension}
- {initial malware file name w/o extension}
- In HKEY_LOCAL_MACHINE\Software\Microsoft\ESENT\Process
- ProfSvc
- ProfSvc
- In HKEY_LOCAL_MACHINE\Software\Microsoft\ESENT\Process
- takshost
- takshost
Step 7
Search and delete these folders
- %User Temp%\screens
Step 8
Search and delete this file
- %Application Data%\Microsoft\AeLookupSvi.exe
- %Application Data%\pid.txt
- %Application Data%\pidloc.txt
Step 9
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_LIMITAIL.RAC. 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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