Analysis by: Homer Pacag
ALIASES:

Trojan.Cridex (Symantec)

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

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.

It connects to certain websites to send and receive information. It gathers information and reports it to its servers.

  TECHNICAL DETAILS

File Size: 249,856 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 19 Apr 2016
Payload: Connects to URLs/IPs, Downloads files, Steals information

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.

Other Details

This spyware connects to the following website to send and receive information:

  • {BLOCKED}.{BLOCKED}.100.40:4033
  • {BLOCKED}.{BLOCKED}.100.41:4033
  • {BLOCKED}.{BLOCKED}.144.98:1943

It does the following:

  • Downloads and executes a file
  • Injects the downloaded file to a process

It gathers the following information and reports it to its servers:

  • username
  • OS version
  • installed applications

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.476.04
FIRST VSAPI PATTERN DATE: 19 Apr 2016
VSAPI OPR PATTERN File: 12.477.00
VSAPI OPR PATTERN Date: 19 Apr 2016

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product and note files detected as TSPY_DRIDEX.YYSTD

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

Search and delete the file detected as TSPY_DRIDEX.YYSTD

[ Learn More ]

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_DRIDEX.YYSTD. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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