ADW_PUMPI


 PLATFORM:

Windows

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

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This adware 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:

5,434,312 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

24 Oct 2014

Arrival Details

This adware 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 adware creates the following folders:

  • %User Profile%\Application Data\iPumper
  • %User Temp%\tmp6
  • %User Temp%\tmp1B
  • %User Temp%\tmp2C

(Note: %User Profile% is a user's profile folder, where it usually is C:\Documents and Settings\{user name} on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name} 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.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)

Other System Modifications

This adware deletes the following files:

  • %User Temp%\amitest.txt
  • %User Temp%\420F92AC6479F0D8C58C6FE21126644A.ini
  • %User Temp%\setup.exe
  • %User Temp%\ami14.tmp
  • %User Temp%\797DDD454E4AE72DBCA1C3713A6F0640.ini
  • %User Temp%\ami25.tmp
  • %User Temp%\5AA3253E71D63F02C62C5A4289C728C1.ini
  • %User Temp%\ami36.tmp

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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 adds the following registry keys:

HKEY_CURRENT_USER\Software\Escolade

HKEY_CLASSES_ROOT\brasilin.cosets.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
brasilin.cosets.1\CLSID

HKEY_CLASSES_ROOT\brasilin.cosets

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
brasilin.cosets\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}\LocalServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}\Version

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}\TypeLib

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Escolade
GUID = "2df07d9a405311e4a6cf0050569f1d4d"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}\LocalServer32
ServerExecutable = "%User Temp%\setup.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}\TypeLib
Version = "1.0"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
EventMessageFile = "%System%\ESENT.dll"

(Note: The default value data of the said registry entry is {random values}.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
CategoryMessageFile = "%System%\ESENT.dll"

(Note: The default value data of the said registry entry is {random values}.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
CategoryCount = "1"

(Note: The default value data of the said registry entry is 10.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
TypesSupported = "7"

(Note: The default value data of the said registry entry is 7.)

Dropping Routine

This adware drops the following files:

  • %User Temp%\{malware file name}_001660.log
  • %User Temp%\htmlayout.dll
  • %User Profile%\iPumper\config.xml
  • %User Temp%\tmp9.exe
  • %User Temp%\tmp1E.exe
  • %User Temp%\tmp2F.exe
  • %User Temp%\awhC.tmp
  • %User Temp%\awhF.tmp
  • %User Temp%\ami14.tmp.ico
  • %User Temp%\awh21.tmp
  • %User Temp%\ami25.tmp.ico
  • %User Temp%\awh32.tmp
  • %User Temp%\ami36.tmp.ico

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.. %User Profile% is a user's profile folder, where it usually is C:\Documents and Settings\{user name} on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name} 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.)

Other Details

This adware connects to the following possibly malicious URL:

  • {BLOCKED}1.11.90
  • {BLOCKED}0.1
  • {BLOCKED}.210.63
  • {BLOCKED}.193.33
  • {BLOCKED}.192.149

This report is generated via an automated analysis system.

  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

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\Software
    • Escolade
  • In HKEY_CLASSES_ROOT
    • brasilin.cosets.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\brasilin.cosets.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • brasilin.cosets
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\brasilin.cosets
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {667b9cbe-8863-4193-b906-c5433a8714fa}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}
    • LocalServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}
    • Version
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {D7371144-28A2-4EE0-9F39-6778669A91D9}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D7371144-28A2-4EE0-9F39-6778669A91D9}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}
    • TypeLib

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\Escolade
    • GUID = "2df07d9a405311e4a6cf0050569f1d4d"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{667b9cbe-8863-4193-b906-c5433a8714fa}\LocalServer32
    • ServerExecutable = "%User Temp%\setup.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{87D6AEC4-13BF-4604-8B04-2DCE3F5DFC41}\TypeLib
    • Version = "1.0"

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\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
    • From: EventMessageFile = "%System%\ESENT.dll"
      To: EventMessageFile = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
    • From: CategoryMessageFile = "%System%\ESENT.dll"
      To: CategoryMessageFile = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
    • From: CategoryCount = "1"
      To: CategoryCount = ""10""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
    • From: TypesSupported = "7"
      To: TypesSupported = ""7""

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%\{malware file name}_001660.log
  • %User Temp%\htmlayout.dll
  • %User Profile%\iPumper\config.xml
  • %User Temp%\tmp9.exe
  • %User Temp%\tmp1E.exe
  • %User Temp%\tmp2F.exe
  • %User Temp%\awhC.tmp
  • %User Temp%\awhF.tmp
  • %User Temp%\ami14.tmp.ico
  • %User Temp%\awh21.tmp
  • %User Temp%\ami25.tmp.ico
  • %User Temp%\awh32.tmp
  • %User Temp%\ami36.tmp.ico

Step 6

Search and delete these folders

[ 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 Profile%\Application Data\iPumper
  • %User Temp%\tmp6
  • %User Temp%\tmp1B
  • %User Temp%\tmp2C

Step 7

Scan your computer with your Trend Micro product to delete files detected as ADW_PUMPI. 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%\amitest.txt
  • %User Temp%\420F92AC6479F0D8C58C6FE21126644A.ini
  • %User Temp%\setup.exe
  • %User Temp%\ami14.tmp
  • %User Temp%\797DDD454E4AE72DBCA1C3713A6F0640.ini
  • %User Temp%\ami25.tmp
  • %User Temp%\5AA3253E71D63F02C62C5A4289C728C1.ini
  • %User Temp%\ami36.tmp


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