Analysis by: Mar Philip Elaurza
ALIASES:

Infostealer.Bankeiya (Symantec), a variant of Win32/FlyStudio (ESET-NOD32), Trojan-Downloader.Win32.Apher (Ikarus),

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

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

As of this writing, the said sites are inaccessible.

It logs a user's keystrokes to steal information.

It sends gathered information to a predetermined email address using its own Simple Mail Transfer Protocol (SMTP) engine.

  TECHNICAL DETAILS

File Size: 364,812 bytes
File Type: EXE
File Compression: UPX
Memory Resident: No
Initial Samples Received Date: 10 Sep 2015
Payload: Connects to URLs/IPs, Logs keystrokes

Arrival Details

This spyware 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 spyware adds the following mutexes to ensure that only one of its copies runs at any one time:

  • zhegehaizhenbzda

Download Routine

This spyware connects to the following URL(s) to download its configuration file:

  • http://{BLOCKED}n.{BLOCKED}5.com/jmx.txt

As of this writing, the said sites are inaccessible.

Information Theft

This spyware logs a user's keystrokes to steal information.

Stolen Information

This spyware sends gathered information to a predetermined email address using its own Simple Mail Transfer Protocol (SMTP) engine.

  SOLUTION

Minimum Scan Engine: 9.750
FIRST VSAPI PATTERN FILE: 10.836.01
FIRST VSAPI PATTERN DATE: 03 Jun 2014
VSAPI OPR PATTERN File: 10.837.00
VSAPI OPR PATTERN Date: 04 Jun 2014

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 TSPY_BANKER.ERO. 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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