Analysis by: Adrian Cofreros
ALIASES:

VBS/Kryptik.AP trojan(NOD32),[Encoded.vbs]:VBS/Safa

 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: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

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

It does not have any propagation routine.

It does not have any backdoor routine.

As of this writing, the said sites are inaccessible.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size: 16,588 bytes
File Type: VBS
Memory Resident: No
Initial Samples Received Date: 11 Aug 2014
Payload: Downloads files, Opens Internet Explorer window

Arrival Details

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

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}lfoodandwine.com/fem0709.dat

It saves the files it downloads using the following names:

  • {malware path}\moth.dat - it will be deleted after the data it contains are read and converted.
  • {malware path}\mofutsu.dat -the converted binary data of moth.dat

As of this writing, the said sites are inaccessible.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

It opens a hidden Internet Explorer window and accesses the following URL:

  • http://{BLOCKED}lfoodandwine.com/img/index.html

It executes the following file:

  • {malware path}\gingr.vbe

It will wait for 10 seconds after execution of gingr.vbe then deletes the following file:

  • {malware path}\mofutsu.dat

It does not have rootkit capabilities.

It does not exploit any vulnerability.

  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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Search and delete these files

[ 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.
  • {malware path}\moth.dat
  • {malware path}\mofutsu.dat

Step 4

Scan your computer with your Trend Micro product to delete files detected as VBS_FAKENIT.PAB. 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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