TSPY_TANDFUY.B
TrojanDownloader:Win32/Tandfuy.B (Microsoft); Backdoor.Trojan (Symantec); Trojan-Dropper.Win32.Agent.ktmr (Kaspersky); Mal/Generic-L (Sophos); Trojan.Win32.Generic!BT (Sunbelt)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware 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
36,640 bytes
EXE
No
29 May 2014
Arrival Details
This spyware 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 spyware adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\BITS
WOW64 = "1"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\BITS\Parameters
ServiceDll = "%System%\midimapbits.dll"
(Note: The default value data of the said registry entry is "%System%\qmgr.dll".)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\BITS
Start = "2"
(Note: The default value data of the said registry entry is "3".)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\BITS
Type = "272"
(Note: The default value data of the said registry entry is "32".)
Dropping Routine
This spyware drops the following files:
- %Temp%\version361.dat
- %System%\midimapbits.dll
(Note: %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
Download Routine
This spyware downloads the file from the following URL and renames the file when stored in the affected system:
- http://{BLOCKED}idata.com/eng/test/jp1.php?m={random}&os={os version}&ie={iexplorer version}
- http://{BLOCKED}ate.{BLOCKED}ook.net/ja523.jpg
- http://www.{BLOCKED}i-pg.co.jp/bbs/data/update/ja523.jpg
- http://www.{BLOCKED}point.jp/member/img/ja523.jpg
- http://www.{BLOCKED}eje.net/ja523.jpg
- http://{BLOCKED}date.gndot.com/ja523.jpg
- http://{BLOCKED}vidata.com/images/ja523.jpg
- http://www.{BLOCKED}hoo.co.jp/ja523.jpg
- http://www.{BLOCKED}te.com/ja523.jpg
- http://www.{BLOCKED}han.co.kr/bbs/data/free/ja523.jpg
- http://www.{BLOCKED}koking.jp/ja523.jpg
- http://www.{BLOCKED}n.com/ja523.jpg
- http://www.{BLOCKED}ngame.com/ja523.jpg
- http://www.{BLOCKED}zmodo.jp/ja523.jpg
- http://www.{BLOCKED}insmsn.com/ja523.jpg
- http://www.{BLOCKED}ins.com/ja523.jpg
- http://www.{BLOCKED}aync.jp/ja523.jpg
- http://www.{BLOCKED}soft.jp/
- http://www.{BLOCKED}story.com/start/ja523.jpg
- http://www.{BLOCKED}tmarble.net/ja523.jpg
It saves the files it downloads using the following names:
- %System Root%\a.dat
- %Temp%\image.jpg
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp.)
Other Details
This spyware connects to the following possibly malicious URL:
- {BLOCKED}.145.238
- {BLOCKED}.142.22
- {BLOCKED}.63.230
- {BLOCKED}.132.112
- {BLOCKED}3.40.1
- {BLOCKED}.215.210
- {BLOCKED}.102.42
- {BLOCKED}5.68.187
- {BLOCKED}8.153.54
- {BLOCKED}62.18
- {BLOCKED}.196.132
- {BLOCKED}0.49.173
SOLUTION
9.700
10.826.05
29 May 2014
10.827.00
29 May 2014
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
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_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BITS
- WOW64 = "1"
Step 3
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BITS\Parameters
- From: ServiceDll = "%System%\midimapbits.dll"
To: ServiceDll = "%System%\qmgr.dll"
- From: ServiceDll = "%System%\midimapbits.dll"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BITS
- From: Start = "2"
To: Start = "3"
- From: Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BITS
- From: Type = "272"
To: Type = "32"
- From: Type = "272"
Step 4
Search and delete these components
- %System%\midimapbits.dll
- %System Root%\a.dat
- %Temp%\image.jpg
- %Temp%\version361.dat
Step 5
Scan your computer with your Trend Micro product to delete files detected as TSPY_TANDFUY.B. 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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