TROJ_HEPERBOT.SM

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.

It is injected into all running processes to remain memory resident.

It does not have any propagation routine.

It does not have any backdoor routine.

It connects to certain websites to send and receive information.

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:

• %Windows%\{random foldername}\{random filename}.exe ← detected also as TROJ_HEPERBOT.SM

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

It adds the following processes:

• attrib.exe
• explorer.exe

It is injected into all running processes to remain memory resident.

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• Global\lock_{random characters}
• Global\inst_{random characters}
• Global\{random characters}.mutex
• Global\{random characters}

It is injected into the following processes running in memory:

• created attrib.exe
• created explorer.exe

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{random name} = "%Windows%\{random foldername}\{random filename}.exe"

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Dropping Routine

This Trojan drops the following files:

• %All Users Profile%\Application Data\Sun\{random characters}.bkp ← encrypted file
• %All Users Profile%\Application Data\{random folder name}\{random characters}.dat ← encrypted file

(Note: %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.)

Information Theft

This Trojan gathers the following data:

• Computer name
• System install date
• System Version
• Processor information
• Machine GUID
• Digital Product ID

Other Details

This Trojan connects to the following URL(s) to check for an Internet connection:

• microsoft.com
• facebook.com
• wikipedia.org
• google.com
• yahoo.com

It connects to the following website to send and receive information:

• {BLOCKED}show.su

NOTES:

It checks if the following files exists in the system before injecting its code:

• %System%\drivers\cmdguard.sys
• %System%\drivers\klif.sys

This trojan injects its code through different methods depending on the existence of the said files.

It does not have rootkit capabilities.

It does not exploit any vulnerability.