Analysis by: John Anthony Banes
 ALIASES:

Exploit.RTF-ObfsStrm.Gen (BitDefender); Exploit:O97M/CVE-2017-0199.D (Microsoft); Exploit-CVE2017-0199.bj (NAI)

 PLATFORM:

Windows

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

  • Threat Type: Exploit

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Canal de infecção: Spammed via email, Dropped by other malware, Downloaded from the Internet

This Exploit 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.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

Tipo de compactação: 235,290 bytes
Tipo de arquivo: RTF
Residente na memória: No
Data de recebimento das amostras iniciais: 17 Jul 2018
Carga útil: Connects to URLs/IPs, Displays message/message boxes, Downloads files

Arrival Details

This Exploit 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.

Download Routine

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

  • http://{BLOCKED}gstrustbank.tk/petit/zone/udo.hta

It takes advantage of the following software vulnerabilities to download possibly malicious files:

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

As of this writing, the said sites are inaccessible.

Other Details

This Exploit does the following:

  • Upon opening the document, shows the following user prompt:

  SOLUTION

Mecanismo de varredura mínima: 9.850
Primeiro arquivo padrão VSAPI: 14.384.02
Data do lançamento do primeiro padrão VSAPI: 17 Jul 2018
VSAPI OPR Pattern Version: 14.385.00
VSAPI OPR Pattern veröffentlicht am: 18 Jul 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

Scan your computer with your Trend Micro product to delete files detected as TROJ_CVE20170199.TIDBOBL. 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.