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TROJ_DELF.SMUM2

July 25, 2013
 ALIASES:

Trojan:Win32/Iconomon.A (Microsoft); Trojan.Dropper (Symantec); PAK:PE_Patch.PECompact, PAK:PecBundle, PAK:PECompact (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.5585923 (FSecure)

 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:

320,512 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

24 May 2012

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.

Other System Modifications

This Trojan deletes the following files:

  • %User Profile%\360°²È«ÎÀÊ¿\360°²È«ÎÀÊ¿.lnk
  • %User Profile%\360°²È«ÎÀÊ¿\360ľÂí·À»ðǽ.lnk
  • %User Profile%\360°²È«ÎÀÊ¿\360Èí¼þ¹Ü¼Ò.lnk
  • %User Profile%\360°²È«ÎÀÊ¿\жÔØ360°²È«ÎÀÊ¿.lnk
  • %User Profile%\360°²È«ÎÀÊ¿\ÐÞ¸´360°²È«ÎÀÊ¿.url
  • %User Profile%\360ɱ¶¾\360ɱ¶¾.lnk
  • %User Profile%\360ɱ¶¾\²¡¶¾¸ôÀëÇø.lnk
  • %User Profile%\360ɱ¶¾\жÔØ360ɱ¶¾.lnk
  • %User Profile%\360ɱ¶¾\ÐÞ¸´360ɱ¶¾.lnk
  • %User Profile%\360°²È«×ÀÃæ\360°²È«×ÀÃæ.lnk
  • %User Profile%\360°²È«×ÀÃæ\жÔØ360°²È«×ÀÃæ.lnk
  • %Desktop%\360°²È«ÎÀÊ¿.lnk
  • %Desktop%\360°²È«×ÀÃæ.lnk
  • %Desktop%\360Èí¼þ¹Ü¼Ò.lnk
  • %Desktop%\Ç¿Á¦Ð¶ÔصçÄÔÉϵÄÈí¼þ.lnk
  • %Desktop%\360ɱ¶¾.lnk

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

It deletes the following folders:

  • %User Profile%\³ÌÐò\360°²È«ÎÀÊ¿
  • %User Profile%\³ÌÐò\360ɱ¶¾
  • %User Profile%\³ÌÐò\360°²È«×ÀÃæ

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

Dropping Routine

This Trojan drops the following files:

  • %Program Files%\Common Files\Safe.ico
  • %Program Files%\Common Files\SD.ico

(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).)

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

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%\Common Files\Safe.ico
  • %Program Files%\Common Files\SD.ico

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_DELF.SMUM2. 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 4

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 Profile%\360°²È«ÎÀÊ¿\360°²È«ÎÀÊ¿.lnk
  • %User Profile%\360°²È«ÎÀÊ¿\360ľÂí·À»ðǽ.lnk
  • %User Profile%\360°²È«ÎÀÊ¿\360Èí¼þ¹Ü¼Ò.lnk
  • %User Profile%\360°²È«ÎÀÊ¿\жÔØ360°²È«ÎÀÊ¿.lnk
  • %User Profile%\360°²È«ÎÀÊ¿\ÐÞ¸´360°²È«ÎÀÊ¿.url
  • %User Profile%\360ɱ¶¾\360ɱ¶¾.lnk
  • %User Profile%\360ɱ¶¾\²¡¶¾¸ôÀëÇø.lnk
  • %User Profile%\360ɱ¶¾\жÔØ360ɱ¶¾.lnk
  • %User Profile%\360ɱ¶¾\ÐÞ¸´360ɱ¶¾.lnk
  • %User Profile%\360°²È«×ÀÃæ\360°²È«×ÀÃæ.lnk
  • %User Profile%\360°²È«×ÀÃæ\жÔØ360°²È«×ÀÃæ.lnk
  • %Desktop%\360°²È«ÎÀÊ¿.lnk
  • %Desktop%\360°²È«×ÀÃæ.lnk
  • %Desktop%\360Èí¼þ¹Ü¼Ò.lnk
  • %Desktop%\Ç¿Á¦Ð¶ÔصçÄÔÉϵÄÈí¼þ.lnk
  • %Desktop%\360ɱ¶¾.lnk


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