TROJ_KRYPTIK.NOI

October 09, 2012
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

Win32/Kryptik.ALPP trojan (NOD32), Mal/ZboCheMan-D (Sophos), Trj/OCJ.A (Panda)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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 deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size:

50,176 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

10 Sep 2012

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.

Installation

This Trojan adds the following processes:

  • svchost.exe

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}1.{BLOCKED}0.35.74

It deletes the initially executed copy of itself

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.390.03

FIRST VSAPI PATTERN DATE:

10 Sep 2012

VSAPI OPR PATTERN File:

9.391.00

VSAPI OPR PATTERN Date:

11 Sep 2012

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product and note files detected as TROJ_KRYPTIK.NOI

Step 3

Terminate a process file/s detected as TROJ_KRYPTIK.NOI

[ Learn More ]

*Note: If the detected file/s is/are not displayed in theWindows Task Manager, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_KRYPTIK.NOI. 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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