BKDR_ZACCESS.NJ
Trojan:Win32/Sirefef.BC (Microsoft), Backdoor.Win32.ZAccess (Ikarus)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
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. It may be dropped by other malware.
It is used to load and execute a file.
TECHNICAL DETAILS
47,616 bytes
DLL
18 Oct 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.
It may be dropped by other malware.
Other Details
This backdoor is used to load and execute the following file:
- %System%\z
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
NOTES:
This malware exports functions used by other malwares for their backdoor routines.
SOLUTION
9.300
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
- %System%\z
Step 3
Scan your computer with your Trend Micro product to delete files detected as BKDR_ZACCESS.NJ. 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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