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BKDR_KULUOZ.XTRT

June 26, 2014
 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: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This backdoor 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:

241,152 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 Jun 2014

Arrival Details

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

Installation

This backdoor drops the following copies of itself into the affected system:

  • %Application Data%\{random}.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other Details

This backdoor connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.64.41:8080
  • {BLOCKED}.{BLOCKED}.160.101:8080
  • {BLOCKED}.{BLOCKED}.211.170:443
  • {BLOCKED}.{BLOCKED}.235.180:443
  • {BLOCKED}.{BLOCKED}.41.123:443
  • {BLOCKED}.{BLOCKED}.112.178:443
  • {BLOCKED}.{BLOCKED}.37.173:8080
  • {BLOCKED}.{BLOCKED}.13.124:8080
  • {BLOCKED}.{BLOCKED}.55.37:8080
  • {BLOCKED}.{BLOCKED}.163.221:443

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.870.04

FIRST VSAPI PATTERN DATE:

18 Jun 2014

VSAPI OPR PATTERN File:

10.871.00

VSAPI OPR PATTERN Date:

19 Jun 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

Scan your computer with your Trend Micro product to delete files detected as BKDR_KULUOZ.XTRT. 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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