BAT_SWRORT.C

July 30, 2016
 Analysis by: Jeanne Jocson
 PLATFORM:

Windows Vista (32 bit, 64 bit), Windows 7 (32 bit, 64 bit), Windows 8 (32 bit, 64 bit)

 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:

Downloaded from the Internet, Dropped by other malware

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

  TECHNICAL DETAILS

File Size:

3,075 bytes

Memory Resident:

No

Initial Samples Received Date:

12 Jul 2016

Payload:

Connects to URLs/IPs, Drops files

Arrival Details

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

It may be dropped by the following malware:

  • TROJ_SWRORT.TBY

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • https://{BLOCKED}ntation.com:443/{pseudo-random characters}

It saves the files it downloads using the following names:

  • %User Temp%\{random letters}.vbs - detected by Trend Micro as VBS_SWRORT.C

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.652.04

FIRST VSAPI PATTERN DATE:

14 Jul 2016

VSAPI OPR PATTERN File:

12.653.00

VSAPI OPR PATTERN Date:

15 Jul 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

Remove the malware/grayware file that dropped/downloaded BAT_SWRORT.C. (Note: Please skip this step if the threat(s) listed below have already been removed.)

    TROJ_SWRORT.TBY

Step 4

Remove malware/grayware files dropped/downloaded by BAT_SWRORT.C. (Note: Please skip this step if the threats listed below have already been removed.)

    VBS_SWRORT.C

Step 5

Scan your computer with your Trend Micro product to delete files detected as BAT_SWRORT.C. 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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