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Threat Encyclopedia

TROJ_DLOAD.NOM

ANALYSIS BY

Anthony Joe Melgarejo


PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type:Trojan

  • Destructiveness:No

  • Encrypted: Yes

  • In the wild: Yes

OVERVIEW

Infection Channel:

Spammed via email


This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

As of this writing, the said sites are inaccessible.

TECHNICAL DETAILS

File Size:

90,112 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

16 Nov 2013

Payload:

Connects to URLs/IPs, Downloads files

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}ksecurityx.hopto.org

It saves the files it downloads using the following names:

  • %User Temp%\m_editerror.tmp

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

As of this writing, the said sites are inaccessible.

NOTES:

It terminates itself if the following conditions are met:

  • If one of these modules is found loaded in any memory of a process:
    • dbghelp (Debugging Tools for Windows)
    • sbiedll (Sandboxie)
  • If the following virtual environment related strings are found in the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Enum registry:
    • Qemu
    • VMware
    • Virtual
    • Xen

SOLUTION

Minimum Scan Engine:

9.700

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

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.
  • %User Temp%\m_editerror.tmp

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOAD.NOM. 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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