Analysis by: John Anthony Banes
 Modified by: Arvin Roi Macaraeg
ALIASES:

TrojanDownloader:O97M/Donoff(MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Spammed via email, Dropped by other malware, Downloaded from the Internet

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It 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: 109,056 bytes
File Type: XLS
Memory Resident: No
Initial Samples Received Date: 18 Dec 2018
Payload: Connects to URLs/IPs, Displays message/message boxes

Arrival Details

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

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

Other Details

This Trojan does the following:

  • This Trojan connects to the following website(s) to download and execute a script:
    • https://{BLOCKED}2.{BLOCKED}x.com/4a/4f/BlSALZQZ_o.png
    • https://i.{BLOCKED}r.com/o7h7NeV.png
    • https://{BLOCKED}e.frl/i/g5lw84pmkrsqdk0z.png
    • https://i.{BLOCKED}g.cc/RSvh2V9v/R3.png?dl=1
  • The document contains the following message details luring users to enable macro content:
  • It proceeds with its malicious routines if the language setting of the affected machine is set to Japanese.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.696.05
FIRST VSAPI PATTERN DATE: 18 Dec 2018
VSAPI OPR PATTERN File: 14.697.00
VSAPI OPR PATTERN Date: 19 Dec 2018

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

Scan your computer with your Trend Micro product to delete files detected as X2KM_DLOADER.AA. 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:

Step 4

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]


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