TROJ_TEDROO.BMS
Spammer:Win32/Tedroo.AJ (Microsoft), Spam-Tedroo.gen.g (McAfee), Trojan.Win32.Generic!BT (Sunbelt), Win32/SpamTool.Tedroo.AQ (ESET)
Windows 2000, Windows XP, Windows Server 2003
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.
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.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
MSSMARTMON1 = "{malware path name}"
Other System Modifications
This Trojan adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Tcpip\Parameters
MaxUserPort = "fffe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Tcpip\Parameters
TcpNumConnections = "fffe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\BITS
id = "{32 numbers}"
Other Details
This Trojan connects to the following possibly malicious URL:
- hub.{BLOCKED}yre.com
NOTES:
This Trojan monitors the following Simple Mail Transfer Protocol (SMTP) servers:
- alt1.aspmx.l.google.com
- alt2.aspmx.l.google.com
- alt3.aspmx.l.google.com
- alt4.aspmx.l.google.com
- in-01.mx.aol.com
- in-02.mx.aol.com
- in-03.mx.aol.com
- in-04.mx.aol.com
- mailin-01.mx.aol.com
- mailin-02.mx.aol.com
- mailin-03.mx.aol.com
- mailin-04.mx.aol.com
- mta5.am0.yahoodns.net
- mta6.am0.yahoodns.net
- mta7.am0.yahoodns.net
- mx1.gmx.com
- mx1.hotmail.com
- mx2.gmx.com
- mx2.hotmail.com
- mx3.gmx.com
- mx3.hotmail.com
- mx4.gmx.com
- mx4.hotmail.com
- ns1.google.com
- ns2.google.com
- ns3.google.com
- ns4.google.com
- t1.aspmx.l.google.com
- t2.aspmx.l.google.com
- t3.aspmx.l.google.com
- t4.aspmx.l.google.com
- yf1.yahoo.com
- yf2.yahoo.com
- yf3.yahoo.com
- yf4.yahoo.com
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
Restart in Safe Mode
Step 4
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- MSSMARTMON1 = "{malware path name}"
- MSSMARTMON1 = "{malware path name}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\BITS
- id = "{32 numbers}"
- id = "{32 numbers}"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
- MaxUserPort = "fffe"
- MaxUserPort = "fffe"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
- TcpNumConnections = "fffe"
- TcpNumConnections = "fffe"
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_TEDROO.BMS. 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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