BKDR_AGENT.KZL
Exploit:Win32/ShellCode.gen!B (Microsoft); W32/Simfect.dr (McAfee); W32.Wapomi!gen1 (Symantec); PAK:ASPack, Backdoor.Win32.Agent.bqav (Kaspersky); Trojan.Win32.Wapomi.AO (v) (not malicious) (Sunbelt); MemScan:Trojan.Generic.KDV.336417 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor 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
230,912 bytes
EXE
No
18 May 2012
Arrival Details
This backdoor 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 backdoor deletes the following files:
- %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Dropping Routine
This backdoor drops the following files:
- %System Root%\Documents and Settings\Infotmp.txt
- %Temp%\r1e546351.txt
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp or C:\WINNT\Temp.)
This report is generated via an automated analysis system.
SOLUTION
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
- %System Root%\Documents and Settings\Infotmp.txt
- %Temp%\r1e546351.txt
Step 3
Scan your computer with your Trend Micro product to delete files detected as BKDR_AGENT.KZL. 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.
- %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log
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