BAT_DLOAD.SMJ
Trojan.BAT.Downbat.a (Sunbelt), Troj/DownBat-A(Sophos), BAT/TrojanDownloader.Ftp.NOK trojan(Eset)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: No
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
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.
Download Routine
This Trojan downloads files from the following File Transfer Protocol (FTP) sites:
- {BLOCKED}.{BLOCKED}.58.184
- {BLOCKED}.{BLOCKED}.79.109 - connection reset
- {BLOCKED}.{BLOCKED}.75.143 - file to download not found
- {BLOCKED}.{BLOCKED}.213.66 - inaccessible
- {BLOCKED}.{BLOCKED}.218.57 - inaccessible
- {BLOCKED}.{BLOCKED}.165.136 - inaccessible
- {BLOCKED}.{BLOCKED}.176.17 - inaccessible
- {BLOCKED}.{BLOCKED}.146.161 - inaccessible
It saves the files it downloads using the following names:
- C:\boot1.exe
- C:\bootMarkNet32.exe
- C:\bootnonsa.exe
- C:\bootslrvdaer.exe - detected as PE_PARITE.A
- C:\bootwinlogan.exe
- C:\snonsa.exe
- C:\sslrvdaer.exe - detected as PE_PARITE.A
- C:\stMUMA.exe
- C:\stSB360.exe
- C:\stsmss.exe
NOTES:
This Trojan requires the user name and password to successfully download the files.
SOLUTION
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Remove malware/grayware files dropped/downloaded by BAT_DLOAD.SMJ. (Note: Please skip this step if the threats listed below have already been removed.)
- PE_PARITE.A
Step 4
Search and delete these files
- C:\boot1.exe
- C:\bootMarkNet32.exe
- C:\bootnonsa.exe
- C:\bootwinlogan.exe
- C:\snonsa.exe
- C:\stMUMA.exe
- C:\stSB360.exe
- C:\stsmss.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as BAT_DLOAD.SMJ. 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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