INF_RIMECUD.TPZ

February 20, 2017
 Analysis by: Ryan Paolo Maglaque
 ALIASES:

Worm:Win32/Rimecud!inf(Microsoft);Win32.Rimecud.A(Quickheal)

 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 may be dropped by other malware.

It automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

File Size:

1250 bytes

File Type:

INF

Memory Resident:

No

Initial Samples Received Date:

17 Feb 2017

Arrival Details

This Trojan may be dropped by the following malware:

  • WORM_RIMECUD

Propagation

The said .INF file contains the following strings:

;{random characters}
[autorun]
open=U3ROM/system32.exe
;{random characters}
icon=U3ROM/default.ico
;{random characters}
action=Open
;{random characters}
shell\open\command=U3ROM/system32.exe
shell\explore\command=U3ROM/system32.exe
useautoplay=1
:GOTO NUL
;{random characters}

Other Details

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

  • {Drive Letter}:\U3ROM\system32.exe

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.224.05

FIRST VSAPI PATTERN DATE:

16 Feb 2017

VSAPI OPR PATTERN File:

13.225.00

VSAPI OPR PATTERN Date:

17 Feb 2017

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

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

Remove the malware/grayware file dropped/downloaded by INF_RIMECUD.TPZ. (Note: Please skip this step if the threat(s) listed below have already been removed.)

     
    • WORM_RIMECUD

Step 4

Scan your computer with your Trend Micro product to delete files detected as INF_RIMECUD.TPZ. 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.


Did this description help? Tell us how we did.