Analysis by: Rika Joi Gregorio
ALIASES:

Trojan.Win32.Pincav(Ikarus), Trj/Downloader.MDW(Panda)

 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:

  • 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.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size: 487,424 bytes
Memory Resident: Yes
Initial Samples Received Date: 19 Jun 2013

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 files:

  • %System%\packet64.dll
  • %System%\qmgrxp.dll
  • %System%\WinWMI.dll
  • {malware path}\{malware file name}.dat

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

Other Details

This backdoor connects to the following possibly malicious URL:

  • http://{BLOCKED}r.{BLOCKED}o.com.tw/FC001/{computer name}-{random string}

It opens the following files:

  • {malware path}\{malware file name}.dat

It deletes itself after execution.

  SOLUTION

Minimum Scan Engine: 9.300

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

Restart in Safe Mode

[ Learn More ]

Step 3

Search and delete this file

[ 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%\packet64.dll
  • %System%\qmgrxp.dll
  • %System%\WinWMI.dll
  • {malware path}\{malware file name}.dat

Step 4

Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_PTIGER.RJG. 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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