arrow_back
search
close

WORM_BAGLE.GEN

October 11, 2018
 Analysis by: Arvin Roi Macaraeg
 ALIASES:

Worm:Win32/Bagle [non_writable_container] (MICROSOFT), Email-Worm.Win32.Bagle.f (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Worm 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:

31,992 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 Oct 2018

Arrival Details

This Worm 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 Worm drops the following files:

  • %System%\go54o.exe
  • %System%\ii5nj4.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It drops the following copies of itself into the affected system:

  • %System%\i1ru54n4.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Autostart Technique

This Worm adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
rate.exe = "%System%\i1ru54n4.exe"

Other System Modifications

This Worm adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\winword
frun = "1"

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

12.750.06

FIRST VSAPI PATTERN DATE:

01 Sep 2016

VSAPI OPR PATTERN File:

12.751.00

VSAPI OPR PATTERN Date:

02 Sep 2016

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

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • rate.exe = "%System%\i1ru54n4.exe"
  • In HKEY_CURRENT_USER\Software\winword
    • frun = "1"

Step 4

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.
  • %System%\go54o.exe
  • %System%\ii5nj4.exe
  • %System%\i1ru54n4.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as WORM_BAGLE.GEN. 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:


Did this description help? Tell us how we did.