Analysis by: RonJay Kristoffer Caragay
ALIASES:

Win32/Hikit.C trojan (NOD32), VirTool:WinNT/Fexel.A (Microsoft)

 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: No

  • In the wild: Yes

  OVERVIEW

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

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 may be dropped by other malware.

It does not have any propagation routine.

It does not have any backdoor routine.

Its rootkit functionalities are used by other malware/grayware.

It does not drop any other file.

It does not have any downloading capability.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size: 14,848 bytes
File Type: SYS
Memory Resident: Yes
Initial Samples Received Date: 23 May 2014

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.

It may be dropped by the following malware:

  • BKDR_HIKIT

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Rootkit Capabilities

This Trojan s rootkit functionalities are used by other malware/grayware.

Dropping Routine

This Trojan does not drop any other file.

Download Routine

This Trojan does not have any downloading capability.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

This malware requires to be installed as a service to work properly. It hooks nsiproxy.sys. It hides the driver object named https.sys.

It does the following:

  • Hides the port specified by the backdoor component by hooking ZwDeviceIoControlFile function
  • Hides specific file/s from being listed by hooking ZwQueryDirectoryFile function
  • Hides specific registries keys from being listed by hooking ZwEnumerateKey function
  • Hides specific processes from being listed by hooking ZwQuerySystemInformation function

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine: 9.700
FIRST VSAPI PATTERN FILE: 10.812.03
FIRST VSAPI PATTERN DATE: 23 May 2014
VSAPI OPR PATTERN File: 10.813.00
VSAPI OPR PATTERN Date: 23 May 2014

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

Identify and delete files detected as RTKT_HIKIT.KZ using either the Startup Disk or Recovery Console

[ Learn More ]

Step 3

Scan your computer with your Trend Micro product to delete files detected as RTKT_HIKIT.KZ. 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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