BAT_DLOAD.XU

May 06, 2014
 Analysis by: Jimelle Monteser
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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.

  TECHNICAL DETAILS

File Size:

Varies

Memory Resident:

No

Initial Samples Received Date:

25 Apr 2014

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:

  • %System Root%\boot{random filename}.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.175.140
  • {BLOCKED}.{BLOCKED}.31.73
  • {BLOCKED}.{BLOCKED}.52.62
  • {BLOCKED}.{BLOCKED}.51.107
  • {BLOCKED}.{BLOCKED}.160.222
  • {BLOCKED}.{BLOCKED}.97.23
  • {BLOCKED}.{BLOCKED}.82.234
  • {BLOCKED}.{BLOCKED}.200.113
  • {BLOCKED}.{BLOCKED}.230.232
  • {BLOCKED}.{BLOCKED}.82.105
  • {BLOCKED}.{BLOCKED}.175.140
  • {BLOCKED}.{BLOCKED}.102.28
  • {BLOCKED}.{BLOCKED}.169.45
  • {BLOCKED}.{BLOCKED}.15.203
  • {BLOCKED}.{BLOCKED}.169.243
  • {BLOCKED}.{BLOCKED}.81.132

NOTES:

Wherein {random filename} could be any of the following:

  • office.exe
  • carl1.exe
  • 36Osb.exe
  • svhost.exe
  • 360.exe
  • svchost.exe
  • server.exe
  • wetst.exe
  • 260.exe
  • 1.exe
  • SB360.exe
  • winma.exe
  • sbinfo.exe
  • cc.exe
  • 111.exe

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.750.04

FIRST VSAPI PATTERN DATE:

25 Apr 2014

VSAPI OPR PATTERN File:

10.751.00

VSAPI OPR PATTERN Date:

25 Apr 2014

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

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %System Root%\boot{random filename}.exe

Step 3

Scan your computer with your Trend Micro product to delete files detected as BAT_DLOAD.XU. 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.


Did this description help? Tell us how we did.