Infection Channel: Downloaded from the Internet, Dropped by other malware
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.
It steals system information. It logs a user's keystrokes to steal information.
File size: 654,096 bytes
Memory resident: Yes
Initial samples received date: 13 Nov 2012
Payload: Compromises system security, Logs keystrokes, Connects to URLs/IPs, Steals information
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 non-malicious files:
- %User Temp%\2.ico
- %User Temp%\.exe
- %Application Data%\Microsoft\Windows\{Random File Name}.cfg
- %Application Data%\Microsoft\Windows\{Random File Name}.xtr
- %Application Data%\plugin.dat
- %Application Data%\2.ico
- %Current Folder%\plugin.dat
- %User Temp%\winxp7
- %User Temp%\winxp8
- %Application Data%\Rood.3gp
- %Application Data%\GDIPFONTCACHEV1.DAT
(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.. %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)
It drops the following copies of itself into the affected system:
- %Application Data%\IDF.exe
- %Application Data%\Microsoft Word Update.exe
- %Application Data%\tempp.exe
- %Application Data%\winrar.exe
- %Application Data%\smss.exe
- %User Temp%\Microsoft Word.exe
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.. %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.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
It injects threads into the following normal process(es):
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Autostart Technique
This backdoor drops the following shortcut pointing to its copy in the User Startup folder to enable its automatic execution at every system startup:
Other System Modifications
This backdoor adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\WinRAR SFX
{Malware Path} = {Malware Path}
HKEY_CURRENT_USER\Software\XtremeRAT
Mutex = {Random Values}
It adds the following registry keys as part of its installation routine:
HKEY_CLASSES_ROOT\qv1668809101y.oac
HKEY_CURRENT_USER\Software\IDF 23-9
HKEY_CLASSES_ROOT\he1779463363a.pqb
HKEY_CURRENT_USER\Software\yjudhfvjndghjghj
HKEY_CLASSES_ROOT\rz1263048663h.byi
HKEY_CURRENT_USER\Software\brSTgHafH
HKEY_CLASSES_ROOT\ep1839519877p.otz
HKEY_CURRENT_USER\Software\remote
HKEY_CLASSES_ROOT\pe1771047725g.bgt
Backdoor Routine
This backdoor opens the following port(s) where it listens for remote commands:
- TCP port 50001
- TCP port 12001
It connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}3.no-ip.net
- {BLOCKED}1.no-ip.net
- skype.{BLOCKED}p3.com
- {BLOCKED}f.blogsite.org
- test.{BLOCKED}odem.org
- {BLOCKED}2.no-ip.net
Information Theft
This backdoor steals system information.
It logs a user's keystrokes to steal information.
Stolen Information
This backdoor saves the stolen information in the following file:
- %Application Data%\logs.dat
- %Application Data%\winxplog.dat
- %Current Folder%\logs.dat
- %Application Data%\Microsoft\Windows\{Random File Name}.dat
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)
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