Trojan.Win32.PANDASTEAL.THDABBA

This Trojan may arrive bundled with malware packages as a malware component. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

As of this writing, the said sites are inaccessible.

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

It 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 adds the following processes:

• REG ADD HKEY_CURRENT_USER\Software\Classes\CLSID\{fIVyUCyCgmYerDKhxywzCYHpaydQNEHJFGMJlsvEUxVbJBYZdTsUZShIZHHQYTVJJZjgDNeeOnJQOdvxQbp00e52-a214-4aGfgWBQtvSqxOkOREyJyBKuXxCVZOBjjnsGfdicRWTGVQHmjYPtuuQkXOxZYqUvnYGCdbzhxPoRzVpxIvPgNZuuByZUC-8fba-4357bb0072ec} /f
• REG ADD HKEY_CURRENT_USER\Software\Classes\CLSID\{fIVyUCyCgmYerDKhxywzCYHpaydQNEHJFGMJlsvEUxVbJBYZdTsUZShIZHHQYTVJJZjgDNeeOnJQOdvxQbp00e52-a214-4aGfgWBQtvSqxOkOREyJyBKuXxCVZOBjjnsGfdicRWTGVQHmjYPtuuQkXOxZYqUvnYGCdbzhxPoRzVpxIvPgNZuuByZUC-8fba-4357bb0072ec}\InProcServer32 /ve /t REG_SZ /d C:\IDontExist.dll /f
• cMd.E"x"e 2ubishdata2/R = PowERsHELl -ExecutionPolicy Bypass -w 1 /e {command}
• PowERsHELl -ExecutionPolicy Bypass -w 1 /e {command}

Autostart Technique

This Trojan drops the following file(s) in the Windows User Startup folder to enable its automatic execution at every system startup:

• %User Startup%\{malware filename}.exe

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows 2003(32-bit), XP and 2000(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit), 10(64-bit).)

Dropping Routine

This Trojan drops the following files:

• %User Temp%\DyEqOdpm.exe

(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Download Routine

This Trojan accesses the following websites to download files:

• http://{BLOCKED}.{BLOCKED}.213.108/po/tai1.exe

As of this writing, the said sites are inaccessible.

Other Details

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\Classes\
CLSID\{fIVyUCyCgmYerDKhxywzCYHpaydQNEHJFGMJlsvEUxVbJBYZdTsUZShIZHHQYTVJJZjgDNeeOnJQOdvxQbp00e52-a214-4aGfgWBQtvSqxOkOREyJyBKuXxCVZOBjjnsGfdicRWTGVQHmjYPtuuQkXOxZYqUvnYGCdbzhxPoRzVpxIvPgNZuuByZUC-8fba-4357bb0072ec}
InProcServer32 = "C:\IDontExist.dll"

It does the following:

• It uses dsadd command using the following parameters to make changes in the active directory:
  • dsadd uanxmqderqqsqQhUgbsodWdmikeGaKOULMmamrYJdLDYhjbsKmBsrHcleMjhBWPsaxUwqXukSYAUKKjCGLrAHdEBTffQSsG
  • cn={username}{added user count starting at 1}
  • cn=uanxmqderqqsqQhUgbsodWdmikeGaKOULMmamrYJdLDYhjbsKmBsrHcleMjhBWPsaxUwqXukSYAUKKjCGLrAHdEBTffQSsGs
  • dc={DcName}
  • dc=com -pwd {password}