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TSPY_BANKER.ZIP

June 18, 2013
 ALIASES:

TrojanProxy:BAT/Banker.G (Microsoft); RDN/PWS-Banker!br (McAfee); Trojan.Win32.Generic!BT (Sunbelt)

 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:

25,088 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 May 2013

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 creates the following folders:

  • %User Temp%\1.tmp

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

Other System Modifications

This spyware deletes the following files:

  • %User Temp%\1.tmp

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

It adds the following registry keys:

HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\
Microsoft\Windows\CurrentVersion\
Internet Settings\ZoneMap\Domains\
com.br\*.bb

HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\
Microsoft\Windows\CurrentVersion\
Internet Settings\ZoneMap\Domains\
com.br\*.itau

HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\
Microsoft\Windows\CurrentVersion\
Internet Settings\ZoneMap\Domains\
com.br\*.hsbc

HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\
Microsoft\Windows\CurrentVersion\
Internet Settings\ZoneMap\Domains\
com.br\*.bradesco

HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\
Microsoft\Windows\CurrentVersion\
Internet Settings\ZoneMap\Domains\
com.br\*.santander

HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\
Microsoft\Windows\CurrentVersion\
Internet Settings\ZoneMap\Domains\
com.br\*.santanderempresarial

HKEY_LOCAL_MACHINE\Software\Wow6432Node\
Microsoft\Internet Explorer\MAIN

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
WarnonBadCertRecving = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
WarnOnIntranet = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
EnableLUA = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
DisableSR = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap\Domains\com.br\
*.bb
http = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap\Domains\com.br\
*.itau
http = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap\Domains\com.br\
*.hsbc
http = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap\Domains\com.br\
*.bradesco
http = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap\Domains\com.br\
*.santander
http = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap\Domains\com.br\
*.santanderempresarial
http = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Extensions Off Page = "http://www.{BLOCKED}e.com.br"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Internet Explorer\MAIN
Extensions Off Page = "http://www.{BLOCKED}e.com.br"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
AutoConfigUrl = "file://%User Temp%/ANNA-CWS30711794.txt"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
AutoConfigUrl = "file://%User Temp%/ANNA-CWS30711794.txt"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
EnableHttp1_1 = "1"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
AntiVirusDisableNotify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
FirewallDisableNotify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
UpdatesDisableNotify = "1"

Dropping Routine

This spyware drops the following files:

  • %User Temp%\~u
  • %User Temp%\~y
  • %User Temp%.\ANNA-CWS30711794.txt
  • %User Temp%\tumbs.db
  • %User Temp%\~x

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

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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

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_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br
    • *.bb
  • In HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br
    • *.itau
  • In HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br
    • *.hsbc
  • In HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br
    • *.bradesco
  • In HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br
    • *.santander
  • In HKEY_USERS\S-1-5-21-4025279379-4087772427-2915903831-500\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br
    • *.santanderempresarial
  • In HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Internet Explorer
    • MAIN

Step 3

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\Internet Settings
    • WarnonBadCertRecving = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • WarnOnIntranet = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
    • EnableLUA = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings
    • DisableSR = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.bb
    • http = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.itau
    • http = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.hsbc
    • http = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.bradesco
    • http = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.santander
    • http = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.santanderempresarial
    • http = "2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
    • Extensions Off Page = "http://www.{BLOCKED}e.com.br"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN
    • Extensions Off Page = "http://www.{BLOCKED}e.com.br"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings
    • AutoConfigUrl = "file://%User Temp%/ANNA-CWS30711794.txt"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • AutoConfigUrl = "file://%User Temp%/ANNA-CWS30711794.txt"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings
    • EnableHttp1_1 = "1"

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
    • AntiVirusDisableNotify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
    • FirewallDisableNotify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
    • UpdatesDisableNotify = "1"

Step 5

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %User Temp%\~u
  • %User Temp%\~y
  • %User Temp%.\ANNA-CWS30711794.txt
  • %User Temp%\tumbs.db
  • %User Temp%\~x

Step 6

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %User Temp%\1.tmp

Step 7

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.ZIP. 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.

Step 8

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Temp%\1.tmp


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