Analysis by: Pearl Charlaine Espejo
ALIASES:

Trojan.Win64.Rovnix.df (Kaspersky); Trojan.Rovnix (Malwarebytes); Trojan:Win64/Rovnix (Microsoft); W64/Rovnix.M!tr (Fortinet)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan 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: 79,360 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 22 Feb 2016

Arrival Details

This Trojan 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 Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume Serial Number}

HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume Serial Number}\
PLUGIN

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume Serial Number}
SH1 = "{hex values"}

HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume Serial Number}
SH2 = "{hex values"}

HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume Serial Number}
SH3 = "{hex values"}

HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume Serial Number}
RR = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{Volume Serial Number}\
PLUGIN
{random} = "{hex values"}

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}all.com/download/{random}.zip
  • http://{BLOCKED}all.com/login.asp
  • http://{BLOCKED}all.com/images/transparent.gif
  • http://{BLOCKED}all.com/images/arrows.gif
  • http://{BLOCKED}all.com/images/logout.gif
  • http://{BLOCKED}all.com/images/299396587564.gif

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.358.05
FIRST VSAPI PATTERN DATE: 22 Feb 2016
VSAPI OPR PATTERN File: 12.359.00
VSAPI OPR PATTERN Date: 23 Feb 2016

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

Restart in Safe Mode

[ Learn More ]

Step 4

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_CURRENT_USER\Software\Microsoft\Installer\Products
    • B{Volume Serial Number}

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ64_ROVNIX.YPOK. 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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