PE_CIH.1003
Virus:Win95/CIH.1003 (MICROSOFT)
Windows
Threat Type: Virus
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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
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
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
- {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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