TROJ_OTORUN.EJ

October 08, 2012
 Analysis by: Michael Cabel
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan may arrive bundled with malware packages as a malware component. It may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

733 bytes

File Type:

INF

Memory Resident:

No

Initial Samples Received Date:

05 Mar 2011

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

It may be dropped by other malware.

Propagation

The said .INF file contains the following strings:

:dkslakfkofkwfwÊ×ÄÔÑÊÀÎÔ£ÔÏŒÎ×ÊÔŒŠí¼ôÊŠÔ׌ŠKO?FASFKIAF?WQKFWQ?OJFW?IAHJGfêÔË×ÀÑêôÏÎ×Ê£ÔÈˌգÃÔËŒÊãÎלš¼ãôœõô£ŒË×Ô£ŒËŠÔÈ£ÀŒË×ÎÄÔËÕŒÈÔÕŒŠëàñÄÔ£kjIKLO?FAHNJLIKFJQFwÎØÆÀÔÎÇÙÆÀÎÖçäéæàðÊÀÅÄôöîûàÔØÖÎÏÐØÄÙÖÉÏÐöwghijfwilofuwjpofpw?jfhiklajfAJFWOikfw?ËÙÇÆÀÛÎÔÇÆÀëôûÇÆÙÀëîäàîÖÙÆàîÙÆÔÛïîØÄÔÖîïÄöéîÀÓÐÖÉÏØÄðöóÏÎØÄÏÐÄÔÛïðîÛÂÓÙïëîÖÓÙÆïîöóÏÎØïðÔÛØÎÀØÄÙÆîïàÇóïðîøäùðîäèðñâäîèòßËÄÎÌÈÿî÷ìëîðìØÄÛËÎïÇØÙÖÓÀÛÒØËÄÏØÔÄÎÏÇÓÆÏÐØÓÃÏÐÄÿòâÏËÎÔÛÂÄØËÙÏÀîÙÇÏÆËÎÖÓÇÏØÎÖÓs
[autorun]
shell\Install\command=OBJESI\sise.exe
shell\open\command=OBJESI\sise.exe
shell\explore\command=OBJESI\sise.exe
Shell\open\command=OBJESI\sise.exe
useautoplay=1
shellexecute=OBJESI\sise.exe
open=OBJESI\sise.exe
action=Open folder to view files
icon=shell32.dll,4

NOTES:
This is Trend Micro detection for AUTORUN.INF files dropped by worm malware in physical and/or removable drives to enable automatic execution when the drives are accessed.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.876.12

FIRST VSAPI PATTERN DATE:

05 Mar 2011

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

Scan your computer with your Trend Micro product to delete files detected as TROJ_OTORUN.EJ. 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.


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