Analysis by: John Kevin Sanchez
ALIASES:

Trojan-Downloader.BAT.Ftp.mf (Kaspersky), BAT/Ftp.MF!tr.dldr (Fortinet), BAT/TrojanDownloader.Ftp.NOK trojan (NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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 executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size: 64 bytes
File Type: BAT
Memory Resident: Yes
Initial Samples Received Date: 16 Nov 2016

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.

Download Routine

This Trojan saves the files it downloads using the following names:

  • {malware file path}\Sftppass.exe
  • {malware file path}\S14331.exe
  • {malware file path}\S1433.exe
  • {malware file path}\Boot14331.exe
  • {malware file path}\boot1433.exe
  • {malware file path}\S3306.exe

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.17.213
  • {BLOCKED}.{BLOCKED}.60.164

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.904.03
FIRST VSAPI PATTERN DATE: 17 Nov 2016
VSAPI OPR PATTERN File: 12.905.00
VSAPI OPR PATTERN Date: 18 Nov 2016

Scan your computer with your Trend Micro product to delete files detected as BAT_DLOADER.AUSAB. 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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