Threat Encyclopedia

TSPY_BANKER.DYR

Publish date: October 08, 2014

ANALYSIS BY

Christopher Daniel So


ALIASES:

Trojan:Win32/Malagent!gmb (Microsoft), Backdoor.Win32.Dyreza.d (Kaspersky), Win32/Battdil.C (ESET), W32/Dyreza.C!tr.bdr (Fortinet), Win32:Malware-gen (Avast)

PLATFORM:

Windows

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

  • Threat Type:Spyware

  • Destructiveness:No

  • Encrypted: Yes

  • In the wild: Yes

OVERVIEW

Infection Channel:

Dropped by other malware


This malware is the Dyre banking Trojan, also known as “Dyreza."

To get a one-glance comprehensive view of the behavior of this Spyware, refer to the Threat Diagram shown below.

This spyware may be dropped by other malware.

It may be injected into processes running in memory.

It connects to certain websites to send and receive information.

TECHNICAL DETAILS

File Size:

Varies

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

09 Sep 2014

Payload:

Steals information, Connects to URLs/IPs

Arrival Details

This spyware may be dropped by other malware.

Installation

This spyware drops the following file(s)/component(s):

  • %Application Data%\whr458da.db - configuration file

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It injects itself into the following processes running in the affected system's memory:

  • chrome.exe
  • firefox.exe
  • iexplore.exe

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

  • Global\cdv5b74f5y7

It may be injected into processes running in memory.

Other Details

This spyware connects to the following URL(s) to get the affected system's IP address:

  • http://BLOCKED}hazip.com

It connects to the following website to send and receive information:

  • {BLOCKED}.{BLOCKED}34.142.186:443
  • {BLOCKED}.{BLOCKED}55.183.98:443
  • {BLOCKED}.{BLOCKED}65.249.224:443
  • {BLOCKED}.{BLOCKED}65.212.188:443
  • {BLOCKED}.{BLOCKED}65.194.117:443
  • {BLOCKED}.{BLOCKED}7.71.122:443
  • {BLOCKED}.{BLOCKED}.236.54:443
  • {BLOCKED}.{BLOCKED}65.204.210:443
  • {BLOCKED}.{BLOCKED}.250.88:443
  • {BLOCKED}.{BLOCKED}.220.166:443
  • {BLOCKED}.{BLOCKED}65.204.223:443
  • {BLOCKED}.{BLOCKED}65.237.178:443
  • {BLOCKED}.{BLOCKED}65.237.144:443
  • {BLOCKED}.{BLOCKED}65.237.145:443
  • {BLOCKED}.{BLOCKED}65.237.145:443

NOTES:
It may update its configuration file and obtain entities to target through the C&C servers specified in the default configuration file.

SOLUTION

Minimum Scan Engine:

9.700

VSAPI OPR PATTERN File:

11.139.00

VSAPI OPR PATTERN Date:

10 Sep 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

Search and delete this file

[ 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.
  • %Application Data%\whr458da.db

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.DYR. 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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