Analysis by: Alvin Bacani
ALIASES:

Exploit:Win32/CVE-2010-0188 (Microsoft); Troj/PDFJs-AER (Sophos)

 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: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Spammed via email

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It may be downloaded by other malware/grayware from remote sites.

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

It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size: 9,376 bytes
File Type: PDF
Initial Samples Received Date: 01 Jul 2013
Payload: Drops files

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It may be downloaded by the following malware/grayware from remote sites:

  • HTML_IFRAME.USR

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}otel.net/news/severe-table_directs.php?gcpxgkq=2v:33:2w:1n:1m&wri=1j:1i:1g:1l:2v:33:32:1i:2v:1h&phufl=1i&nhllix=ruepfpa&yjgjkpef=dudpe - detected as BKDR_KRIDEX.KA

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 takes advantage of the following vulnerabilities:

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 10.128.09
FIRST VSAPI PATTERN DATE: 01 Jul 2013
VSAPI OPR PATTERN File: 10.129.00
VSAPI OPR PATTERN Date: 01 Jul 2013

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

Remove the malware/grayware file that dropped/downloaded TROJ_PIDIEF.USR

Step 3

Remove malware/grayware files dropped/downloaded by TROJ_PIDIEF.USR

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.USR. 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.

Step 5

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.



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