BKDR_KASPERAGENT
KasperAgent
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet
This Backdoor 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
490,496 bytes
EXE
Yes
20 Apr 2016
Connects to URLs/IPs
Arrival Details
This Backdoor 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 Backdoor drops the following files:
- %Application Data%\Microsoft\Windows\Cookies\{Username}@www.mailsinfo[1].txt
It drops and executes the following files:
- %System Root%\Line\wincs.exe
- %System Root%\Line\mojanda.docx
- %System Root%\Spooler\runtime.exe
- %System Root%\Spooler\Strategic-studies-course.docx
- %System Root%\star\M.exe
- %System Root%\star\Donea Amjd.mp4
- %System Root%\Intel\2016030201.jpg
- %System Root%\Intel\MkPlayer.exe
- %System Root%\Intel\Mkplayer.exe
- %System Root%\Intel\ST.pdf
- %System Root%\Intel\chance.docx
- %System Root%\start\22.doc
- %System Root%\start\N.exe
- %System Root%\start\Player.exe
- %System Root%\start\X.xls
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
Autostart Technique
This Backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKCU\Software\Microsoft\
Windows\CurrentVersion\Run
DDSystem = {Malware path}\{Malware name}.exe
Other Details
This Backdoor connects to the following possibly malicious URL:
- http://www.{BLOCKED}nfo.net/info/inf.php
SOLUTION
9.850
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
Restart in Safe Mode
Step 4
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
- DDSystem = {Malware path}\{Malware name}.exe
- DDSystem = {Malware path}\{Malware name}.exe
Step 5
Search and delete this file
- %System Root%\Line\wincs.exe
- %System Root%\Line\mojanda.docx
- %System Root%\Spooler\runtime.exe
- %System Root%\Spooler\Strategic-studies-course.docx
- %System Root%\star\M.exe
- %System Root%\star\Donea Amjd.mp4
- %System Root%\Intel\2016030201.jpg
- %System Root%\Intel\MkPlayer.exe
- %System Root%\Intel\Mkplayer.exe
- %System Root%\Intel\ST.pdf
- %System Root%\Intel\chance.docx
- %System Root%\start\22.doc
- %System Root%\start\N.exe
- %System Root%\start\Player.exe
- %System Root%\start\X.xls
- %Application Data%\Microsoft\Windows\Cookies\{Username}@www.mailsinfo[1].txt
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_KASPERAGENT. 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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