ALIASES:

TrojanSpy:Win32/Bancos.DV (Microsoft); PWS-Banker.gen.i (McAfee); Downloader (Symantec); Trojan-Downloader.Win32.Agent.vpy (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Trojan.Generic.685661 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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: 2,194,432 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 01 Oct 2012

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.

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
msne = "{malware path and file name}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
star1 = "%System%\Winrun.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
star2 = "%System%\ischot.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
star3 = "%System%\Xred1.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
star4 = "%System%\Zred2.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
star6 = "%System%\MscheldB.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
star7 = "%System%\Mscheldncx.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
star8 = "%System%\svscheld.exe"

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\WinRegnw

Dropping Routine

This spyware drops the following files:

  • %Windows%\control.ctr

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.200

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

Restart in Safe Mode

[ Learn More ]

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_CURRENT_USER
    • WinRegnw

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • msne = "{malware path and file name}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • star1 = "%System%\Winrun.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • star2 = "%System%\ischot.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • star3 = "%System%\Xred1.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • star4 = "%System%\Zred2.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • star6 = "%System%\MscheldB.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • star7 = "%System%\Mscheldncx.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • star8 = "%System%\svscheld.exe"

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.
  • %Windows%\control.ctr

Step 6

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