TSPY_DRIDEX.YJO

December 02, 2015
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

Backdoor:Win32/Drixed (Microsoft), Trojan.Cridex (Symantec), RDN/Drixed-FBX (McAfee)

 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:

146,432 bytes

File Type:

EXE

Initial Samples Received Date:

12 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:

  • https://{BLOCKED}.{BLOCKED}.203.249:4438
  • https://{BLOCKED}.{BLOCKED}.220.146:4438
  • https://{BLOCKED}.{BLOCKED}.145.12:8443