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TROJ_FAKEAV.KMJ

February 21, 2013
 Analysis by: Rika Joi Gregorio
 ALIASES:

Rogue:Win32/Winwebsec(Microsoft), Trojan.Win32.Tepfer.a (v)(Sunbelt), Trojan-PSW.Win32.Tepfer(Ikarus), a variant of Win32/Kryptik.ATSS trojan(Eset)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 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:

403,968 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

15 Feb 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:

  • {All User's Profile}\Application Data\{random folder name}\{random file name}.exe

It drops the following files:

  • {All User's Profile}\Application Data\{random folder name}\{random file name}.ico

It creates the following folders:

  • {All User's Profile}\Application Data\{random folder name}

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
{random file name} = "{All User's Profile}\Application Data\{random folder name}\{random file name}.exe"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}rketpay.com/p/?
  • http://{BLOCKED}ingpay.com/p/?
  • http://{BLOCKED}illing.com/p/?
  • http://{BLOCKED}utbiz.com/p/?
  • http://{BLOCKED}.{BLOCKED}.225.41/api/stats/install/?ts=743d1a328db2cadd4612c9403e8267313e3e7be3
  • http://{BLOCKED}rchant.com/p/?
  • http://sys.{BLOCKED}support.net/?
  • http://{BLOCKED}.{BLOCKED}.225.41/api/stats/install/?ts=743d1a328db2cadd4612c9403e8267313e3e7be3&affid=71600
  • http://{BLOCKED}.{BLOCKED}.225.41/api/stats/install/?ts=743d1a328db2cadd4612c9403e8267313e3e7be3&affid=71600&ver=3070025&group=dap