TROJ_DELF.RWE


 ALIASES:

Trojan.Gen.2 (Symantec); Trojan.Win32.Generic.pak!cobra (Sunbelt)

 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:

805,376 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

31 Jul 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.

Installation

This Trojan creates the following folders:

  • %User Temp%\is-ESGAU.tmp
  • %User Temp%\is-TL66P.tmp
  • %User Temp%\is-TL66P.tmp\_isetup
  • %Program Files%\1410002
  • %Start Menu%\Programs\ÀÏ»çõ¸®

(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.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.)

Other System Modifications

This Trojan deletes the following files:

  • %Favorites%\99% ÇÒÀÎ ¼îÇÎ °æ¸Å.lnk
  • %Favorites%\99% ÇÒÀÎ ¼îÇÎ °æ¸Å.pif
  • %Favorites%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.lnk
  • %Favorites%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.pif
  • %Desktop%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.lnk
  • %Desktop%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.pif
  • %Favorites%\G¸¶ÄÏ - »õ·Î¿î ¼¼»óÀ» ¿©´Â ¹®, G¸¶ÄÏ.lnk
  • %Favorites%\G¸¶ÄÏ - »õ·Î¿î ¼¼»óÀ» ¿©´Â ¹®, G¸¶ÄÏ.pif
  • %Favorites%\´ç½ÅÀÌ Ã£´Â ¸ðµç ½ºÅ¸ÀÏ, ¿Á¼Ç.lnk
  • %Favorites%\´ç½ÅÀÌ Ã£´Â ¸ðµç ½ºÅ¸ÀÏ, ¿Á¼Ç.pif
  • %Favorites%\¼îÇÎ ½ºÆ®¸®Æ®, 11¹ø°¡.lnk
  • %Favorites%\¼îÇÎ ½ºÆ®¸®Æ®, 11¹ø°¡.pif
  • %Favorites%\ºü¸¥ 3Ùí ½Å¿ë´ëÃâ ¼¾ÅÍ.lnk
  • %Favorites%\ºü¸¥ 3Ùí ½Å¿ë´ëÃâ ¼¾ÅÍ.pif
  • %Start Menu%\Programs\ÀÏ»çõ¸®\ÀÏ»çõ¸® Á¦°Å.pif
  • %Start Menu%\Programs\ÀÏ»çõ¸®\ÀÏ»çõ¸® Á¦°Å.url

(Note: %Favorites% is the current user's Favorites folder, which is usually C:\Windows\Favorites on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Favorites on Windows NT, and C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.)

Dropping Routine

This Trojan drops the following files:

  • %Temporary Internet Files%\hell.exe
  • %User Temp%\is-ESGAU.tmp\hell.tmp
  • %User Temp%\is-TL66P.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-TL66P.tmp\_isetup\_shfoldr.dll
  • %Program Files%\1410002\unins000.dat
  • %Program Files%\1410002\is-QIUT4.tmp
  • %Program Files%\1410002\is-KF620.tmp
  • %User Profile%\Application Data\is-OUC4K.tmp
  • %User Profile%\Application Data\is-F6U52.tmp
  • %User Profile%\Application Data\is-OS27E.tmp
  • %User Profile%\Application Data\is-R1GKM.tmp
  • %User Profile%\Application Data\is-EH2T6.tmp
  • %User Profile%\Application Data\is-FIP6T.tmp
  • %Favorites%\99% ÇÒÀÎ ¼îÇÎ °æ¸Å.url
  • %Favorites%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.url
  • %Desktop%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.url
  • %Favorites%\G¸¶ÄÏ - »õ·Î¿î ¼¼»óÀ» ¿©´Â ¹®, G¸¶ÄÏ.url
  • %Favorites%\´ç½ÅÀÌ Ã£´Â ¸ðµç ½ºÅ¸ÀÏ, ¿Á¼Ç.url
  • %Favorites%\¼îÇÎ ½ºÆ®¸®Æ®, 11¹ø°¡.url
  • %Favorites%\ºü¸¥ 3Ùí ½Å¿ë´ëÃâ ¼¾ÅÍ.url
  • %Start Menu%\Programs\ÀÏ»çõ¸®\ÀÏ»çõ¸® Á¦°Å.lnk

(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.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Favorites% is the current user's Favorites folder, which is usually C:\Windows\Favorites on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Favorites on Windows NT, and C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Search and delete these files

[ Learn More ]
There may be some component 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.
  • %Temporary Internet Files%\hell.exe
  • %User Temp%\is-ESGAU.tmp\hell.tmp
  • %User Temp%\is-TL66P.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-TL66P.tmp\_isetup\_shfoldr.dll
  • %Program Files%\1410002\unins000.dat
  • %Program Files%\1410002\is-QIUT4.tmp
  • %Program Files%\1410002\is-KF620.tmp
  • %User Profile%\Application Data\is-OUC4K.tmp
  • %User Profile%\Application Data\is-F6U52.tmp
  • %User Profile%\Application Data\is-OS27E.tmp
  • %User Profile%\Application Data\is-R1GKM.tmp
  • %User Profile%\Application Data\is-EH2T6.tmp
  • %User Profile%\Application Data\is-FIP6T.tmp
  • %Favorites%\99% ÇÒÀÎ ¼îÇÎ °æ¸Å.url
  • %Favorites%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.url
  • %Desktop%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.url
  • %Favorites%\G¸¶ÄÏ - »õ·Î¿î ¼¼»óÀ» ¿©´Â ¹®, G¸¶ÄÏ.url
  • %Favorites%\´ç½ÅÀÌ Ã£´Â ¸ðµç ½ºÅ¸ÀÏ, ¿Á¼Ç.url
  • %Favorites%\¼îÇÎ ½ºÆ®¸®Æ®, 11¹ø°¡.url
  • %Favorites%\ºü¸¥ 3Ùí ½Å¿ë´ëÃâ ¼¾ÅÍ.url
  • %Start Menu%\Programs\ÀÏ»çõ¸®\ÀÏ»çõ¸® Á¦°Å.lnk

Step 3

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 Temp%\is-ESGAU.tmp
  • %User Temp%\is-TL66P.tmp
  • %User Temp%\is-TL66P.tmp\_isetup
  • %Program Files%\1410002
  • %Start Menu%\Programs\ÀÏ»çõ¸®

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_DELF.RWE. 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 5

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.

  • %Favorites%\99% ÇÒÀÎ ¼îÇÎ °æ¸Å.lnk
  • %Favorites%\99% ÇÒÀÎ ¼îÇÎ °æ¸Å.pif
  • %Favorites%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.lnk
  • %Favorites%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.pif
  • %Desktop%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.lnk
  • %Desktop%\[¹«·á´Ù¿î] »çÀÌÆ®¸ðÀ½.pif
  • %Favorites%\G¸¶ÄÏ - »õ·Î¿î ¼¼»óÀ» ¿©´Â ¹®, G¸¶ÄÏ.lnk
  • %Favorites%\G¸¶ÄÏ - »õ·Î¿î ¼¼»óÀ» ¿©´Â ¹®, G¸¶ÄÏ.pif
  • %Favorites%\´ç½ÅÀÌ Ã£´Â ¸ðµç ½ºÅ¸ÀÏ, ¿Á¼Ç.lnk
  • %Favorites%\´ç½ÅÀÌ Ã£´Â ¸ðµç ½ºÅ¸ÀÏ, ¿Á¼Ç.pif
  • %Favorites%\¼îÇÎ ½ºÆ®¸®Æ®, 11¹ø°¡.lnk
  • %Favorites%\¼îÇÎ ½ºÆ®¸®Æ®, 11¹ø°¡.pif
  • %Favorites%\ºü¸¥ 3Ùí ½Å¿ë´ëÃâ ¼¾ÅÍ.lnk
  • %Favorites%\ºü¸¥ 3Ùí ½Å¿ë´ëÃâ ¼¾ÅÍ.pif
  • %Start Menu%\Programs\ÀÏ»çõ¸®\ÀÏ»çõ¸® Á¦°Å.pif
  • %Start Menu%\Programs\ÀÏ»çõ¸®\ÀÏ»çõ¸® Á¦°Å.url


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