TSPY_ZBOT.TIBAECT
Trojan-Spy.Win32.Zbot.wgke (Kaspersky)
Windows
Threat Type: Trojan Spy
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
Arrival Details
This Trojan Spy 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 Spy drops the following files:
- %Application Data%\{random folder name 1}\{random filename 1}.exe
- %Application Data%\{random folder name 2}\{random filename 2}.{random file extension 1}
- %Application Data%\{random folder name 2}\{random filename 2}.tmp
- %Application Data%\{random folder name 3}\{random filename 3}.{random file extension 2}
- %User Temp%\tmp{random}.bat
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.. %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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
It creates the following folders:
- %Application Data%\{random folder name 1}
- %Application Data%\{random folder name 2}
- %Application Data%\{random folder name 3}
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.)
Autostart Technique
This Trojan Spy adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random value 1} = "%Application Data%\{random folder name 1}\{random filename 1}.exe"
Other System Modifications
This Trojan Spy adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
{random registry key}
It also creates the following registry entry(ies) as part of its installation routine:
HKEY_CURRENT_USER\Software\Microsoft\
{random registry key}
{random value 2} = {hex value}
Other Details
This Trojan Spy connects to the following possibly malicious URL:
- http://www.{BLOCKED}nironworrks.net/adams/agree/ject/craop/file.php
However, as of this writing, the said sites are inaccessible.