TSPY_DRIDEX.SPK

November 26, 2015
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

Backdoor:Win32/Drixed.M (Microsoft); Troj/Dridex-JC (Sophos); Trojan.Cridex (Symantec); RDN/Drixed-FCF (McAfee); W32/Dridex.JC!tr (Fortinet); Win32/Dridex.Y (ESET-NOD32);

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

  TECHNICAL DETAILS

File Size:

315,904 bytes

File Type:

EXE

Initial Samples Received Date:

20 Nov 2015

Arrival Details

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

Dropping Routine

This spyware drops the following files:

  • %AppDataLocalLow%\{random filename}.sdb
  • %AppDataLocalLow%\{random filename}.bat

(Note: %AppDataLocalLow% is the protected mode folder of Internet Explorer, where it usually is C:\Users\{user name}\AppData\LocalLow on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other Details

This spyware connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.245.32:2448
  • {BLOCKED}.{BLOCKED}.71.148:8843
  • {BLOCKED}.{BLOCKED}.145.12:8443
  • {BLOCKED}.{BLOCKED}.35.56:8843
  • {BLOCKED}.{BLOCKED}.66.169:7447

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.168.06

FIRST VSAPI PATTERN DATE:

24 Nov 2015

VSAPI OPR PATTERN File:

12.169.00

VSAPI OPR PATTERN Date:

24 Nov 2015

NOTES:

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

All Internet users:

  • Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
  • Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.


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