WORM_GOLROTED.SMV1

 Analysis by: Francis Xavier Antazo

 ALIASES:

TrojanSpy:MSIL/Golroted.B (MICROSOFT), a variant of MSIL/Autorun.Spy.Agent.AU worm (NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Propagates via flashdrives


This worm arrives via removable drives. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

  TECHNICAL DETAILS

File Size:

1,167,872 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

17 Feb 2015

Payload:

Collects system information, Steals information, Connects to URLs/IPs

Arrival Details

This worm arrives via removable drives.

It 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 copies of itself into the affected system and executes them:

  • %Application Data%\Windows Update.exe

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It drops the following files:

  • %Application Data%\pid.txt
  • %Application Data%\pidloc.txt
  • %User Temp%\SysInfo.txt
  • %User Temp%\screens\screenshot1.jpeg

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

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

  • %Application Data%\WindowsUpdate.exe

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Propagation

This worm drops the following copy(ies) of itself in all removable drives:

  • {Removable Drive Letter}:\Sys.exe

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

The said .INF file contains the following strings:

[autorun]
open=Sys.exe
action=Run win32

Information Theft

This worm gathers the following data:

  • Malware process ID
  • Malware path
  • Original malware path
  • Host name
  • Screenshots
  • Keyboard Logs
  • Clipboard Logs
  • System Time
  • Internal Language
  • Operating System
  • Internal IP
  • External IP
  • Antivirus installed
  • Firewall Installed
  • Current Active Window

Other Details

This worm connects to the following URL(s) to get the affected system's IP address:

  • whatismyipaddress.com

NOTES:

This worm access the following Simple Mail Transfer Protocol (SMTP) servers in preparation to send its stolen information:

  • smtp.mail.ru

It steals passwords from the following:

  • Browsers
  • Messaging applications
  • Internet Download Manager
  • Jdownloader
  • Minecraft

It steals passwords from the following messaging applications:

  • Microsoft Outlook
  • Mozilla Thunderbird
  • IncrediMail
  • FoxMail
  • Google Talk
  • Gmail Notifier
  • MSN Messenger
  • Windows Live Mail
  • Pidgin Messenger
  • Miranda IM

It steals passwords from the following browsers:

  • Firefox
  • Internet Explorer
  • Chrome
  • Chrome S x S
  • CoolNovo
  • Opera
  • Apple Safari
  • Flock
  • SeaMonkey
  • SRWare Iron
  • Comodo Dragon

It disables the following processes:

  • taskmgr.exe
  • regedit.exe
  • msconfig.exe
  • cmd.exe

It may come bundled with other files, and may show different behaviors such as:

  • Search for CD keys, product keys, and serial numbers of the following applications:

    • Advanced PDF Password Recovery
    • Ashampoo WinOptimizer Platinum 3
    • Call of Duty
    • Camtasia Studio
    • Codec Tweak Tool
    • Command and Conquer Generals Zero Hour
    • Counter-Strike
    • CyberLink PowerDVD
    • Dawn of War
    • Empire Earth II
    • F-Secure BackWeb
    • Macromedia Flash
    • Nero
    • Network Associates, Inc. Sniffer Pro
    • PowerQuest PartitionMagic
    • Splinter Cell Pandora Tomorrow
    • Star Wars battlefront II
    • The Sims 2
    • TuneUp Utilities

  SOLUTION

Minimum Scan Engine:

9.750

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

Search and delete these files

[ 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.  
  • %UserTemp%\SysInfo.txt
  • %Application Data%\pid.txt
  • %Application Data%\pidloc.txt
  • %User Temp%\screens\screenshot1.jpeg (screenshot)

Step 4

Search and delete AUTORUN.INF files created by WORM_GOLROTED.SMV1 that contain these strings

[ Learn More ]
[autorun] open=Sys.exe action=Run win32

Step 5

Scan your computer with your Trend Micro product to delete files detected as WORM_GOLROTED.SMV1. 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.


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