PE_KRAZE.A
TrojanDownloader:Win32/Small (Microsoft); Downloader.a!bk3 (McAfee); W32.Kraze (Symantec); PAK:UPX, Virus.Win32.BackDown.a (Kaspersky); Trojan-Downloader.Win32.Small (Sunbelt); Trojan.Downloader.ZB (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: File infector
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This file infector 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
Arrival Details
This file infector 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 file infector creates the following folders:
- %Program Files%\Common Files\InstallShield
- %Program Files%\Common Files\InstallShield\Engine
- %Program Files%\Common Files\InstallShield\Engine\6
- %Program Files%\Common Files\InstallShield\Engine\6\Intel 32
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\ADMINI~1
- %User Profile%\LOCALS~1
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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.)
Other System Modifications
This file infector deletes the following files:
- %User Temp%\IEC1.tmp
(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.)
It deletes the following folders:
- %Program Files%\Common Files\InstallShield\engine\6\Intel 32
- %Program Files%\Common Files\InstallShield\engine\6
- %Program Files%\Common Files\InstallShield\engine
- %Program Files%\Common Files\InstallShield\iScript
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
Dropping Routine
This file infector drops the following files:
- %User Temp%\IEC1.tmp
(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.)
Other Details
This file infector connects to the following possibly malicious URL:
- http://{BLOCKED}p.com/mygiftlist/images/back.jpg
This report is generated via an automated analysis system.
SOLUTION
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 this file
- %User Temp%\IEC1.tmp
Step 3
Search and delete these folders
- %Program Files%\Common Files\InstallShield
- %Program Files%\Common Files\InstallShield\Engine
- %Program Files%\Common Files\InstallShield\Engine\6
- %Program Files%\Common Files\InstallShield\Engine\6\Intel 32
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\ADMINI~1
- %User Profile%\LOCALS~1
Step 4
Scan your computer with your Trend Micro product to clean files detected as PE_KRAZE.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 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.
- %User Temp%\IEC1.tmp
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