TROJ_MALM5M.A

July 25, 2013
 ALIASES:

Trojan:Win32/Adialer (Microsoft); Dialer-RAS.v.gen. (McAfee); Dialer.CarpeDiem (Symantec); Porn-Dialer.Win32.CapreDeam.x (Kaspersky); CarpeDiem (v) (Sunbelt); The file is signed by an untrusted certificate, issued by: Dialer.989. (AVG)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan 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:

96,936 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

07 May 2013

Arrival Details

This Trojan 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 Trojan drops the following copies of itself into the affected system:

  • %Program Files%\montorgueil\{malware file name}\{malware file name}

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

It creates the following folders:

  • %Program Files%\Montorgueil
  • %Program Files%\montorgueil\{malware file name}
  • %Start Menu%\Programs\HOT Dialer

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

Other System Modifications

This Trojan deletes the following files:

  • %Program Files%\montorgueil\{malware file name}\{malware file name}.ico
  • %Desktop%\{malware file name}-.exe
  • %Program Files%\Montorgueil\14.06208

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
SystemCertificates\TrustedPublisher\Certificates\
2DCB4C0C78BBE64B52C0312BAB2E95EA2971C353

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0-16755

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0-16755-1

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0\UserId

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
SystemCertificates\TrustedPublisher\Certificates\
2DCB4C0C78BBE64B52C0312BAB2E95EA2971C353
Blob = "{random values}"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0
CanLaunch = "N"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0
Num = "0"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0
Silent = "N"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0
Standard = "N"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0-16755-1
Fournisseur = "0"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0-16755-1
Ver = "1406208"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0-16755-1
Produit = "0"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0-16755-1
Tracking = "0"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0\UserId
ID = "0007182"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0\UserId
Pays = "1"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0\UserId
Langue = "9"

HKEY_CURRENT_USER\Software\Montorgueil
Access = "H"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0
CanLaunch = "O"

HKEY_CURRENT_USER\Software\Montorgueil\
Kit0
Prefixe = "0"

Dropping Routine

This Trojan drops the following files:

  • %Program Files%\montorgueil\{malware file name}\{malware file name}.ico.2
  • %Program Files%\Montorgueil\14.06208.2
  • %Start Menu%\{malware file name}.lnk
  • %Start Menu%\programs\hot dialer\{malware file name}.lnk
  • %Start Menu%\programs\hot dialer\uninstall {malware file name}.lnk
  • %Desktop%\{malware file name}.lnk
  • %Program Files%\montorgueil\{malware file name}\{malware file name}.ico
  • %Program Files%\Montorgueil\14.06208

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop 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_CURRENT_USER\Software\Microsoft\SystemCertificates\TrustedPublisher\Certificates
    • 2DCB4C0C78BBE64B52C0312BAB2E95EA2971C353
  • In HKEY_CURRENT_USER\Software\Montorgueil
    • Kit0
  • In HKEY_CURRENT_USER\Software\Montorgueil
    • Kit0-16755
  • In HKEY_CURRENT_USER\Software\Montorgueil
    • Kit0-16755-1
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0
    • UserId

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\SystemCertificates\TrustedPublisher\Certificates\2DCB4C0C78BBE64B52C0312BAB2E95EA2971C353
    • Blob = "{random values}"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0
    • CanLaunch = "N"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0
    • Num = "0"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0
    • Silent = "N"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0
    • Standard = "N"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0-16755-1
    • Fournisseur = "0"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0-16755-1
    • Ver = "1406208"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0-16755-1
    • Produit = "0"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0-16755-1
    • Tracking = "0"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0\UserId
    • ID = "0007182"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0\UserId
    • Pays = "1"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0\UserId
    • Langue = "9"
  • In HKEY_CURRENT_USER\Software\Montorgueil
    • Access = "H"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0
    • CanLaunch = "O"
  • In HKEY_CURRENT_USER\Software\Montorgueil\Kit0
    • Prefixe = "0"

Step 4

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.
  • %Program Files%\montorgueil\{malware file name}\{malware file name}.ico.2
  • %Program Files%\Montorgueil\14.06208.2
  • %Start Menu%\{malware file name}.lnk
  • %Start Menu%\programs\hot dialer\{malware file name}.lnk
  • %Start Menu%\programs\hot dialer\uninstall {malware file name}.lnk
  • %Desktop%\{malware file name}.lnk
  • %Program Files%\montorgueil\{malware file name}\{malware file name}.ico
  • %Program Files%\Montorgueil\14.06208

Step 5

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.
  • %Program Files%\Montorgueil
  • %Program Files%\montorgueil\{malware file name}
  • %Start Menu%\Programs\HOT Dialer

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_MALM5M.A. 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 7

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.

  • %Program Files%\montorgueil\{malware file name}\{malware file name}.ico
  • %Desktop%\{malware file name}-.exe
  • %Program Files%\Montorgueil\14.06208


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