BREX_BANKER.ACE


 ALIASES:

Trojan-Banker.JS.Agent.x (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet, Via email

This Trojan Spy arrives as an attachment to email messages mass-mailed 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:

4,962 bytes

Memory Resident:

Yes

Initial Samples Received Date:

24 Aug 2017

Payload:

Connects to URLs/IPs, Steals information

Arrival Details

This Trojan Spy arrives as an attachment to email messages mass-mailed 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.

Stolen Information

This Trojan Spy sends the gathered information via HTTP POST to the following URL:

  • https://{BLOCKED}anotherrace.com/javascript/log3.php?logins=1

NOTES:

This is a Google browser extension named IDKEY STOR.

This malware looks for the following strings first before its executing malicious routine:

  • "fetuar "
  • "agar "
  • "agamento "
  • "sign "
  • "ontinu "
  • "inaliza "
  • "cessa "
  • "confirma "
  • "ok "
  • "ntra "
  • "avan "
  • "ogin "
  • "uber "

It also triggers its malicious routine when following buttons are clicked:

  • "#idSIButton9"
  • "#signIn"
  • "#login-signin"
  • "#idbtn1"

It monitors all visited websites and gathers the following information:

  • location.hostname
  • location.href
  • HTML input elements with the ff. types:
    • password
    • text
    • email
    • tel
    • number
    • hidden

It also has bar-code(boletos) tampering capability targeting following legitimate banking websites:

  • [banco.brades]co.com.br/html/classic/produtos-servicos/outros/2-via-de-b
  • [ba]nkline.itau.com.br
  • https://www.losangonet.com.br/Commons/asp/BarcodeImage.aspx?G=003&C={credentials}

It gathers tampering information from:

  • https://{BLOCKED}anotherrace.com/salsa10/index.php?lendo=

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.626.04

FIRST VSAPI PATTERN DATE:

30 Aug 2017

VSAPI OPR PATTERN File:

13.627.00

VSAPI OPR PATTERN Date:

31 Aug 2017

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 BREX_BANKER.ACE. 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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