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TSPY_SKRINCAP.C

August 07, 2015
 ALIASES:

Infostealer.Limitail (Norton); Trojan horse MSIL8.AJKL (AVG); Gen:Heur.MSIL.Androm.10 (BitDefender); MSIL/KJB!tr (Fortinet); Trojan.MSIL.Injector (Ikarus); a variant of MSIL/Injector.KKM trojan (ESET-NOD32);

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet

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.

  TECHNICAL DETAILS

File Size:

556,544 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

29 Jun 2015

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 copies of itself into the affected system and executes them:

  • %User Profile%\Templates\takshost.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It drops and executes the following files:

  • %Application Data%\Microsoft\Windows\AdobeARMservice.exe - executes the dropped copy, detected as TROJ_SKRINCAP.C

(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 drops the following copies of itself into the affected system:

  • %Application Data%\Microsoft\Windows\bthserv.exe

(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.)

Dropping Routine

This spyware drops the following files:

  • %Application Data%\{HostName}_{Date & Time}.jpg - Snapshot of the Desktop, deleted afterwards

(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.)

Information Theft

This spyware gathers the following data:

  • Computer Name
  • Open applications
  • Keystrokes
  • Machine time
  • Snapshot of desktop

Stolen Information

This spyware sends the gathered information via HTTP POST to the following URL:

  • http://nelsonpanel.{BLOCKED}6.lt/webpanel/webpanel/image/upload.php
  • http://nelsonpanel.{BLOCKED}6.lt/webpanel/webpanel/post.php

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.760.03

FIRST VSAPI PATTERN DATE:

26 Jun 2015

VSAPI OPR PATTERN File:

11.761.00

VSAPI OPR PATTERN Date:

27 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

Remove malware/grayware files dropped/downloaded by TSPY_SKRINCAP.C. (Note: Please skip this step if the threats listed below have already been removed.)

    • TROJ_SKRINCAP.C

Step 4

Restart in Safe Mode

[ Learn More ]

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.
  • ¿plication DataϿicrosoft\Windows\AdobeARMservice.exe
  • ¿plication DataϿHostName}_{Date & Time}.jpg

Step 6

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