TSPY_SEPAR.E

 Analysis by: Jennifer Gumban

 ALIASES:

BAT/PSW.Separ.B trojan, BAT/PSW.Separ.B trojan, BAT/PSW.Separ.B trojan, BAT/PSW.Separ.B trojan (Nod32)

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This spyware arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It modifies the Internet Explorer Zone Settings.

  TECHNICAL DETAILS

File Size:

2,051,094 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

13 Oct 2015

Arrival Details

This spyware arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It 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 file(s)/component(s):

  • %All Users Profile%\Msn\Adobe\003_{datetime}.059
  • %All Users Profile%\Msn\Adobe\{random number}.{random value}
  • %All Users Profile%\Msn\Adobe\Acro3.pmd
  • %All Users Profile%\Msn\Adobe\Acropa4.exe
  • %All Users Profile%\Msn\Adobe\Bcro3.pmd
  • %All Users Profile%\Msn\Adobe\Bdoc.pdf
  • %All Users Profile%\Msn\Adobe\adip.klc
  • %All Users Profile%\Msn\Adobe\az1.bat
  • %All Users Profile%\Msn\Adobe\keeprun.ini
  • %All Users Profile%\Msn\Adobe\kj4.bat
  • %All Users Profile%\Msn\Adobe\mk.qaz
  • %All Users Profile%\Msn\Adobe\monf2.reg
  • %All Users Profile%\Msn\Adobe\sed2.vbs
  • %All Users Profile%\Msn\Adobe\uk5.vbs
  • %System%\Users\Public\Public Document\Adobe\page\003_{datetime}.058
  • %System%\Users\Public\Public Document\Adobe\page\003_{datetime}.059
  • %System%\Users\Public\Public Document\Adobe\page\{random number}.{random value}
  • %System%\Users\Public\Public Document\Adobe\page\Acro3.pmd
  • %System%\Users\Public\Public Document\Adobe\page\Acropa4.exe
  • %System%\Users\Public\Public Document\Adobe\page\Bcro3.pmd
  • %System%\Users\Public\Public Document\Adobe\page\Bdoc.pdf
  • %System%\Users\Public\Public Document\Adobe\page\adip.klc
  • %System%\Users\Public\Public Document\Adobe\page\az1.bat
  • %System%\Users\Public\Public Document\Adobe\page\keeprun.ini
  • %System%\Users\Public\Public Document\Adobe\page\kj4.bat
  • %System%\Users\Public\Public Document\Adobe\page\mk.qaz
  • %System%\Users\Public\Public Document\Adobe\page\monf2.reg
  • %System%\Users\Public\Public Document\Adobe\page\sed2.vbs
  • %System%\Users\Public\Public Document\Adobe\page\uk5.vbs

(Note: %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData 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.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
loo3 = "%User Profile%\Msn\Adobe\kj4.bat"

Other System Modifications

This spyware adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
MSDAIPP\Provider\{6EB2FDC8-EB83A618-96C19D60-2328F370}
{default} = "{Random Hex Values}"

HKEY_CURRENT_USER\Software\Microsoft\
MSDAIPP\Provider\{67AF0C7F-DA0F0745-C3CC8685-CEC42AE0}
{default} = "{Random Hex Values}"

HKEY_CURRENT_USER\Software\WinRAR SFX
C%%Users%Public%Public Document%Adobe%page% = "%System%\Users\Public\Public Document\Adobe\page\"

Web Browser Home Page and Search Page Modification

This spyware modifies the Internet Explorer Zone Settings.

Other Details

This spyware connects to the following possibly malicious URL:

  • ftp.{BLOCKED}stia.com

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.950.04

FIRST VSAPI PATTERN DATE:

30 Sep 2015

VSAPI OPR PATTERN File:

11.951.00

VSAPI OPR PATTERN Date:

01 Oct 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

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete these files

[ 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.
  • %All Users Profile%\Msn\Adobe\003_{datetime}.059
  • %All Users Profile%\Msn\Adobe\{random number}.{random value}
  • %All Users Profile%\Msn\Adobe\Acro3.pmd
  • %All Users Profile%\Msn\Adobe\Acropa4.exe
  • %All Users Profile%\Msn\Adobe\Bcro3.pmd
  • %All Users Profile%\Msn\Adobe\Bdoc.pdf
  • %All Users Profile%\Msn\Adobe\adip.klc
  • %All Users Profile%\Msn\Adobe\az1.bat
  • %All Users Profile%\Msn\Adobe\keeprun.ini
  • %All Users Profile%\Msn\Adobe\kj4.bat
  • %All Users Profile%\Msn\Adobe\mk.qaz
  • %All Users Profile%\Msn\Adobe\monf2.reg
  • %All Users Profile%\Msn\Adobe\sed2.vbs
  • %All Users Profile%\Msn\Adobe\uk5.vbs
  • %System%\Users\Public\Public Document\Adobe\page\003_{datetime}.058
  • %System%\Users\Public\Public Document\Adobe\page\003_{datetime}.059
  • %System%\Users\Public\Public Document\Adobe\page\{random number}.{random value}
  • %System%\Users\Public\Public Document\Adobe\page\Acro3.pmd
  • %System%\Users\Public\Public Document\Adobe\page\Acropa4.exe
  • %System%\Users\Public\Public Document\Adobe\page\Bcro3.pmd
  • %System%\Users\Public\Public Document\Adobe\page\Bdoc.pdf
  • %System%\Users\Public\Public Document\Adobe\page\adip.klc
  • %System%\Users\Public\Public Document\Adobe\page\az1.bat
  • %System%\Users\Public\Public Document\Adobe\page\keeprun.ini
  • %System%\Users\Public\Public Document\Adobe\page\kj4.bat
  • %System%\Users\Public\Public Document\Adobe\page\mk.qaz
  • %System%\Users\Public\Public Document\Adobe\page\monf2.reg
  • %System%\Users\Public\Public Document\Adobe\page\sed2.vbs
  • %System%\Users\Public\Public Document\Adobe\page\uk5.vbs

Step 5

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • loo3 = "%User Profile%\Msn\Adobe\kj4.bat"
  • In HKEY_CURRENT_USER\Software\Microsoft\MSDAIPP\Provider\{6EB2FDC8-EB83A618-96C19D60-2328F370}
    • {default} = "{Random Hex Values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\MSDAIPP\Provider\{67AF0C7F-DA0F0745-C3CC8685-CEC42AE0}
    • {default} = "{Random Hex Values}"
  • In HKEY_CURRENT_USER\Software\WinRAR SFX
    • C%%Users%Public%Public Document%Adobe%page% = "%System%\Users\Public\Public Document\Adobe\page\"

Step 6

Reset Internet security settings

[ Learn More ]

Step 7

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