Trojan.W97M.DLOADR.THCCABO
W97M/Downloader.bjx (McAfee); Trojan-Downloader.MSWord.Agent.buh (Kaspersky)
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.
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.
Other System Modifications
This Trojan modifies the following file(s):
- %Application Data%\Microsoft\Office\Recent\index.dat
- %Application Data%\Microsoft\Office\Word12.pip
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Dropping Routine
This Trojan drops the following files:
- %Application Data%\Microsoft\Office\Recent\office on kungfrdyeducationalinvestment8agender.duckdns.org.url
- %Application Data%\Microsoft\UProof\CUSTOM.DIC
- %Application Data%\Microsoft\UProof\ExcludeDictionaryEN0409.lex
- %Application Data%\Microsoft\Office\Recent\invoice_11154.doc.url
- %Application Data%\Microsoft\Office\Word12.pip
- %Application Data%\Microsoft\Office\Recent\index.dat
- {malware file path and name}
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://kungfrdyeducationalinvestment8agender.{BLOCKED}s.org/office
- http://kungfrdyeducationalinvestment8agender.{BLOCKED}s.org/office/invoice_11154.doc
- http://kungfrdyeducationalinvestment8agender.{BLOCKED}s.org/kungdoc/winlog.exe
This report is generated via an automated analysis system.
SOLUTION
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 2
Search and delete these components
- %Application Data%\Microsoft\Office\Recent\office on kungfrdyeducationalinvestment8agender.duckdns.org.url
- %Application Data%\Microsoft\UProof\CUSTOM.DIC
- %Application Data%\Microsoft\UProof\ExcludeDictionaryEN0409.lex
- %Application Data%\Microsoft\Office\Recent\invoice_11154.doc.url
- %Application Data%\Microsoft\Office\Word12.pip
- %Application Data%\Microsoft\Office\Recent\index.dat
- {malware file path and name}
Step 3
Scan your computer with your Trend Micro product to delete files detected as Trojan.W97M.DLOADR.THCCABO. 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 the following Trend Micro Support pages for more information:
Step 4
Restore deleted/modified files and/or registry entries from backup
*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- %Application Data%\Microsoft\Office\Recent\index.dat
- %Application Data%\Microsoft\Office\Word12.pip
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