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Worm.Win32.OTORUN.NKLSGF

May 11, 2022
 Analysis by: Mc Justine De Guzman
 ALIASES:

Worm.Win32.AutoRun (IKARUS)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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 automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

File Size:

479 bytes

File Type:

INF

Initial Samples Received Date:

06 May 2022

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:

;{Random characters}
[AutoRun]
;{Random characters}
open=w.exe
;{Random characters}
shell\open\Command=w.exe
;{Random characters}
shell\open\Default=1
;{Random characters}
shell\explore\command=w.exe
;{Random characters}

Other Details

This Trojan automatically executes the following files when a user opens a drive:

  • w.exe

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.358.08

FIRST VSAPI PATTERN DATE:

03 Feb 2022

VSAPI OPR PATTERN File:

17.359.00

VSAPI OPR PATTERN Date:

04 Feb 2022

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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

Scan your computer with your Trend Micro product to delete files detected as Worm.Win32.OTORUN.NKLSGF. 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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