BKDR_SHADOWPAD.A

 Analysis by: Ryan Paolo Maglaque

 ALIASES:

Backdoor.Win32.Shadowpad.a(Kaspersky);Backdoor.Shadowpad(Norton);Trojan:Win32/ShadowPad.A(Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet


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

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

180,432 bytes

Memory Resident:

No

Initial Samples Received Date:

08 Aug 2017

Payload:

Connects to URLs/IPs, Steals information

Arrival Details

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

Other System Modifications

This Backdoor adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\1597317749

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\1597317749
Data = {data}

Information Theft

This Backdoor gathers the following data:

  • network parameters
  • username
  • system time

Other Details

This Backdoor connects to the following website to send and receive information:

  • {Random Domain}.com
    It uses domain generation algorithm (DGA) for its C&C servers. It depends on the month and year from the system time.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.598.07

FIRST VSAPI PATTERN DATE:

16 Aug 2017

VSAPI OPR PATTERN File:

13.599.00

VSAPI OPR PATTERN Date:

17 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

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

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • HKEY_LOCAL_MACHINE\SOFTWARE\1597317749

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_SHADOWPAD.A. 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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