ADW_XRIDER

June 26, 2015
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

Riskware/CrossRider (Fortinet); PUP.Optional.CrossRider.A (Malwarebytes); not-a-virus:WebToolbar.Win32.CrossRider.amqa (Kaspersky); a variant of Win32/Toolbar.CrossRider.CD potentially unwanted (ESET-NOD32); Crossrider.055 (AVG); ADWARE/CrossRider.Gen7 (Avira)

 PLATFORM:

Windows

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

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This adware may arrive bundled with malware packages as a malware component. 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:

1,568,848 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

22 Jun 2015

Arrival Details

This adware may arrive bundled with malware packages as a malware component.

It 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 adware adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\{malware filename}

HKEY_CURRENT_USER\Software\_CrossriderRegNamePlaceHolder_

HKEY_LOCAL_MACHINE\SOFTWARE\_CrossriderRegNamePlaceHolder_

It adds the following registry entries:

HKEY_CURRENT_USER\Software\_CrossriderRegNamePlaceHolder_\
Log
{malware filename} = "0"

HKEY_CURRENT_USER\Software\_CrossriderRegNamePlaceHolder_\
Log
2 = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\_CrossriderRegNamePlaceHolder_\
Log
{malware filename} = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\_CrossriderRegNamePlaceHolder_\
Log
2 = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\{malware filename}\
Log
{malware filename} = "0"

  SOLUTION

Minimum Scan Engine:

9.750

SSAPI PATTERN File:

1.635.00

SSAPI PATTERN Date:

25 Jun 2015

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.

 
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • {malware filename}
  • In HKEY_CURRENT_USER\Software
    • _CrossriderRegNamePlaceHolder_
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • _CrossriderRegNamePlaceHolder_

Step 4

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