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INF_OTORUN.WKNO

July 04, 2018
 Analysis by: John Anthony Banes
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

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.

  TECHNICAL DETAILS

File Size:

51 bytes

File Type:

INF

Memory Resident:

No

Initial Samples Received Date:

03 Jul 2018

Payload:

Executes files

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

The said .INF file contains the following strings:

ASCII Strings:
=====================
[AutoRun]
open=8d.bat
shell\open\Command=8d.bat

Other Details

This Trojan does the following:

  • This Trojan automatically executes the following files when a user opens a drive:
    • 8d.bat

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.356.03

FIRST VSAPI PATTERN DATE:

03 Jul 2018

VSAPI OPR PATTERN File:

14.357.80

VSAPI OPR PATTERN Date:

04 Jul 2018

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

Scan your computer with your Trend Micro product to delete files detected as INF_OTORUN.WKNO. 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 the following Trend Micro Support pages for more information:


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