TROJ_KRYPTO.SMIC

November 26, 2013
 Analysis by: Kathleen Notario
 ALIASES:

TrojanDownloader:Win32/Harnig.S; Downloader-AWM.gen.b

 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

23,552 bytes

Memory Resident:

No

Initial Samples Received Date:

18 Nov 2010

Payload:

Downloads files

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}er.com/ibemh/aaick.php?adv=adv702 - detected as TROJ_SMALL.SMJ6
  • http://{BLOCKED}er.com/ibemh/erztbwqyg.php?adv=adv702 - detected as TROJ_TIBS.CEB
  • http://{BLOCKED}er.com/ibemh/imdysnucxe.php?adv=adv702 - detected as TROJ_PROXY.ARV
  • http://{BLOCKED}er.com/ibemh/oovqlsahc.php?adv=adv702 - detected as TROJ_BUBNIX.R

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 deletes itself after execution.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.633.00

FIRST VSAPI PATTERN DATE:

18 Nov 2010

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 dropped/downloaded by TROJ_KRYPTO.SMIC

    TROJ_BUBNIX.R
    TROJ_PROXY.ARV
    TROJ_SMALL.SMJ6
    TROJ_TIBS.CEB

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_KRYPTO.SMIC. 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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