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PE_CIH.1003

June 20, 2023
 Modified by: Carlos Villegas Madrid
 ALIASES:

Virus:Win95/CIH.1003 (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Virus

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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

It infects by inserting its code to unused space in host files.

It does not have any backdoor routine.

  TECHNICAL DETAILS

File Size:

646,656 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

15 Jun 2023

Payload:

Drops files, Overwrites hard disk, Flashes BIOS

Arrival Details

This Virus 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 Virus drops the following files:

  • {Malware Path}\MAIN.TXT
  • {Malware Path}\OGD1NAS.DAT
  • {Malware Path}\OGD1ARI.DAT
  • {Malware Path}\KITEI.DAT
  • {Malware Path}\SYUURE.DAT
  • {Malware Path}\SYUSAK.DAK
  • {Malware Path}\KENSETU.DAT

File Infection

This Virus infects the following file types:

  • EXE

It infects by inserting its code to unused space in host files.

Backdoor Routine

This Virus does not have any backdoor routine.

Rootkit Capabilities

This Virus does not have rootkit capabilities.

Other Details

This Virus does the following:

  • It only affects windows 9x and ME version of operating systems.
  • It only executes if the system date is set to April 26.
  • It overwrites the system Hard Drive and Flash BIOS data leaving the machine unable to boot.

NOTES:

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

5.883.00

FIRST VSAPI PATTERN DATE:

08 Apr 2009

VSAPI OPR PATTERN File:

5.883.00

VSAPI OPR PATTERN Date:

09 Apr 2009

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

Search and delete this file

[ 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}\MAIN.TXT
  • {Malware Path}\OGD1NAS.DAT
  • {Malware Path}\OGD1ARI.DAT
  • {Malware Path}\KITEI.DAT
  • {Malware Path}\SYUURE.DAT
  • {Malware Path}\SYUSAK.DAK
  • {Malware Path}\KENSETU.DAT

Step 4

Scan your computer with your Trend Micro product to delete files detected as PE_CIH.1003. 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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