TROJ_DELF.XXWB

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This Trojan 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 Trojan drops the following copies of itself into the affected system and executes them:

• %User Profile%\AppData\Roaming\regdrv.exe

(Note: %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.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Registry Driver = "%User Profile%\AppData\Roaming\regdrv.exe"

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\RegData

HKEY_CURRENT_USER\Software\RegData\
Data

HKEY_CURRENT_USER\Software\RegData\
Data
projectname = "Ayabot"

HKEY_CURRENT_USER\Software\RegData\
Data
host = "http://{BLOCKED}.{BLOCKED}.91.3/classes/s.php"

HKEY_CURRENT_USER\Software\RegData\
Data
referer = "neutron_star"

HKEY_CURRENT_USER\Software\RegData\
Data
id = {numbers}

HKEY_CURRENT_USER\Software\RegData\
Data
timeresp = "1200000"

HKEY_CURRENT_USER\Software\RegData\
Data
avstat = "0"

HKEY_CURRENT_USER\Software\RegData\
Data
wormstat = "0"

HKEY_CURRENT_USER\Software\RegData\
Data
antiviruson = "0"

Other Details

This Trojan connects to the following possibly malicious URL:

• http://{BLOCKED}lovjanvare.ru/0942c3aad278ce5ea571a61712b4506a.php
• http://{BLOCKED}.{BLOCKED}.91.3/classes/s.php
• http://{BLOCKED}.{BLOCKED}.77.166/classes/a26.exe