Analysis by: Joselyn Canuela
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

This Trojan may be dropped by other malware.

It gathers certain information on the affected computer.

  TECHNICAL DETAILS

File Size: 147,642 bytes
File Type: VBS
Memory Resident: No
Initial Samples Received Date: 23 Mar 2017
Payload: Steals information

Arrival Details

This Trojan may be dropped by other malware.

Information Theft

This Trojan gathers the following information on the affected computer:

  • User Name
  • Computer Name
  • Encrypted file path and file name

NOTES:

It encrypts the files that the shortcuts in this folder points to: %appdata%\microsoft\windows\Recent

It does not delete the original file.

The encrypted file is name as: {original filename and extension}.lnk{count}.dec

Where count:

  • Starts at 1 and increment every file it tries to encrypt

    It sends the information it gathers to the following website:

  • http://{BLOCKED}.{BLOCKED}.214.155/username={Username}?hostname={Computer name}?path=C{Encrypted file path}?filename={Encrypted file name}

    •   SOLUTION

    Minimum Scan Engine: 9.850
    FIRST VSAPI PATTERN FILE: 13.294.05
    FIRST VSAPI PATTERN DATE: 23 Mar 2017

    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 to delete files detected as VBS_CRYPGRAFAR.A. 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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