TSPY_DYRE.YUYCA
PWS:Win32/Dyzap.M (Microsoft); Trojan.Win32.Battdil.P (Baidu);
Windows
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.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
589,312 bytes
Yes
14 Apr 2015
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.
Installation
This spyware drops the following files:
- %System%\config\systemprofile\Application Data\{random}.dll (for Windows XP and lower)
- %AppDataLocal%\{random}.dll (for Windows Vista and higher)
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It drops the following copies of itself into the affected system:
- %Windows%\{random}.exe (for Windows XP and lower)
- %AppDataLocal%\{random}.exe (for Windows Vista and higher)
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Autostart Technique
This spyware registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\googleupdate
DisplayName = "Google Update Service" (for Windows XP or lower)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\googleupdate
ImagePath = {hex value of %Windows%\{random}.exe} (for Windows XP or lower
It adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
GoogleUpdate = "%AppDataLocal%\{random.exe}" (for Windows Vista and higher)
It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\googleupdate (for Windows XP or lower)
Other Details
This spyware connects to the following possibly malicious URL:
- {BLOCKED}.{BLOCKED}22.69.172:4443
- {BLOCKED}.{BLOCKED}189.152.131:443
- {BLOCKED}.{BLOCKED}5.204.114:443
- {BLOCKED}.{BLOCKED}28.190.99:443
- {BLOCKED}.{BLOCKED}28.190.183:443
- {BLOCKED}.{BLOCKED}5.204.114:443
- {BLOCKED}.{BLOCKED}28.191.213:443
- {BLOCKED}.{BLOCKED}28.190.88:443
- {BLOCKED}.{BLOCKED}80.109.121:443
- {BLOCKED}.{BLOCKED}7.88.84:4443
- {BLOCKED}.{BLOCKED}28.190.86:443
- {BLOCKED}.{BLOCKED}56.24.229:443
- {BLOCKED}.{BLOCKED}42.53.142:4443
- {BLOCKED}.{BLOCKED}6.249.207:443
- {BLOCKED}.{BLOCKED}75.23.130:443
- {BLOCKED}.{BLOCKED}136.123.22:443
- {BLOCKED}.{BLOCKED}94.239.126:4443
- {BLOCKED}.{BLOCKED}31.178.46:4443
- {BLOCKED}.{BLOCKED}28.190.167:443
- {BLOCKED}.{BLOCKED}34.34.137:443
- {BLOCKED}.{BLOCKED}111.243.60:4443
- {BLOCKED}.{BLOCKED}49.253.52:4443
- {BLOCKED}.{BLOCKED}7.101.221:4443
- {BLOCKED}.{BLOCKED}249.63.46:443
- {BLOCKED}.{BLOCKED}92.165.229:443
- {BLOCKED}.{BLOCKED}92.165.229:443
- {BLOCKED}.{BLOCKED}12.117.68:443
- {BLOCKED}.{BLOCKED}22.102.105:443
It deletes the initially executed copy of itself
SOLUTION
9.750
11.614.03
14 Apr 2015
11.615.00
14 Apr 2015
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
Search and delete this file
- %System%\config\systemprofile\Application Data\{random}.dll (for Windows XP or lower)
- %AppDataLocal%\{random}.dll (for Windows Vista or higher)
Step 5
Delete this registry key
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\CurrentControlSet\Services
- googleupdate (for Windows XP or lower)
- googleupdate (for Windows XP or lower)
Step 6
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
- GoogleUpdate = "%AppDataLocal%\{random.exe}" (for Windows Vista or higher)
- GoogleUpdate = "%AppDataLocal%\{random.exe}" (for Windows Vista or higher)
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_DYRE.YUYCA. 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 8
Scan your computer with your Trend Micro product to delete files detected as TSPY_DYRE.YUYCA. 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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