TROJ_ROFIN.C
Trojan:Win32/Rofin (Microsoft); Downloader (Symantec); Mal/Behav-031 (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Found Win32/DH{gRKBE14egQ82Cg} (AVG)
Windows
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.
It deletes itself after execution.
TECHNICAL DETAILS
233,565 bytes
EXE
No
12 May 2015
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.
Other System Modifications
This Trojan deletes the following files:
- %System Root%/windows/ax01.da0
- %System Root%/sxz/nnn.dat
- %System Root%/sxz
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
It deletes the following folders:
- %System Root%\sxz
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\ZWebNds\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\ZWebNds\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\ZWebNds
Dropping Routine
This Trojan drops the following files:
- ndisweb_new.dat0
- ndisweb_new.dat1
- %System%\drivers\ZWebNds.sys
- %System%\drivers\uniconfi.dat
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://log.{BLOCKED}g.com/wb/bsf/?mac=00-50-56-9f-29-0e
- {BLOCKED}8.251.56
It deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.750
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Search and delete these components
- ndisweb_new.dat0
- ndisweb_new.dat1
- %System%\drivers\ZWebNds.sys
- %System%\drivers\uniconfi.dat
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_ROFIN.C. 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.
- %System Root%/windows/ax01.da0
- %System Root%/sxz/nnn.dat
- %System Root%/sxz
Step 5
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\ZWebNds
- Security
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\ZWebNds
- Enum
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services
- ZWebNds
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