Analysis by: Michael John Marcos
ALIASES:

Troj/Dapato-E (Sophos), probably a variant of Win32/TrojanProxy.Bakcorox.A (ESET)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware. It arrives as a component bundled with malware/grayware packages.

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

  TECHNICAL DETAILS

File Size: 14,848 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 29 Nov 2012

Arrival Details

This Trojan may be dropped by other malware.

It arrives as a component bundled with malware/grayware packages.

Download Routine

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

  • %Temp%\{random filename}.exe

(Note: %Temp% is the Windows temporary folder, where it usually is C:\Windows\Temp on all Windows operating system versions.)

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:

  • http://{BLOCKED}ksa.com
  • http://{BLOCKED}ka.com
  • http://{BLOCKED}ager.com
  • http://{BLOCKED}vagass.com

  SOLUTION

Minimum Scan Engine: 9.700

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 and note files detected as TROJ_BROXY.B

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete files detected as TROJ_BROXY.B

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.

Step 5

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