TSPY_NEMIM.B

November 12, 2014
 ALIASES:

Trojan:Win32/Nemain.A (Microsoft)

 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 spyware 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. It terminates itself if it detects it is being run in a virtual environment. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

225,280 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

16 Nov 2013

Payload:

Connects to URLs/IPs

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 drops the following files:

  • {malware path}\proto.dat

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{malware filename} = "{malware path and filename} /{number}"

Information Theft

This spyware gathers the following data:

  • Computer name
  • Username
  • OS Version
  • CPU information
  • USB count
  • MAC Address
  • Installed AV software
    If any of the following is present:
    • ekrn.exe
    • NVCAgent.npc
    • 360tray.exe
    • msseces.exe
    • uiWinMgr.exe
    • AvastSvc.exe
    • RsMgrSvr.exe
    • mcagent.exe
    • avgidsagent.exe
    • ccsvchst.exe
    • bdagent.exe
    • avp.exe
    • V3LTray.exe
    • AYAgent.aye

Other Details

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

  • http://{BLOCKED}onaoko.jumpingcrab.com/bin/read_i.php
  • http://{BLOCKED}chsse.{BLOCKED}angled.net/bin/read_i.php
  • http://{BLOCKED}robrownys.{BLOCKED}angled.net/bin/read_i.php
  • http://{BLOCKED}roplants.{BLOCKED}angled.net/bin/read_i.php
  • http://{BLOCKED}rolilics.{BLOCKED}bdance.com/bin/read_i.php

It terminates itself if it detects it is being run in a virtual environment.

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.700

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

Scan your computer with your Trend Micro product and note files detected as TSPY_NEMIM.B

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Delete this registry value

[ 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\Windows\CurrentVersion\Run
    • {malware filename} = "{malware path and filename} /{number}"

Step 5

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.
  • {malware path}\proto.dat

Step 6

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