TSPY_DYRE.YUYBK
PWS:Win32/Dyzap.M (Microsoft), Trojan.Win32.Staser.bgpg (Kaspersky)
Windows
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware may be downloaded by other malware/grayware/spyware from remote sites.
It connects to a website to send and receive information.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
491,008 bytes
EXE
No
27 Mar 2015
Arrival Details
This spyware may be downloaded by other malware/grayware/spyware from remote sites.
It may be downloaded from the following remote sites:
- http://{BLOCKED}rhabit.co.uk/wp-content/uploads/2014/09/din-a.pdf
Installation
This spyware drops the following files depending on the platform/operating system of the affected computer:
- %System%\config\systemprofile\AppData\Local\nw9vbe8cb5.dll - (for Windows XP and lower)
- %AppDataLocal%\nw9vbe8cb5.dl - (For Windows Vista and above)
(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 depending on the platform/operating system of the affected computer:
- %Windows%\{random file name}.exe (For Windows XP and below)
- %AppDataLocal%\{random file name}.exe (For Windows Vista and above)
(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.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- Global\zx5fwtw4ep
It injects codes into the following process(es):
- explorer.exe
- svchost.exe
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
ImagePath = "%Windows%\{random file name}.exe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\googleupdate
DisplayName = "Google Update Service"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\googleupdate
ObjectName = "LocalSystem"
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 file name}.exe" (For Windows Vista and above)
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 and below)
Backdoor Routine
This spyware connects to the following websites to send and receive information:
- {BLOCKED}.{BLOCKED}.191.212:443
- {BLOCKED}.{BLOCKED}.40.82:443
- {BLOCKED}.{BLOCKED}.122.136:4443
- {BLOCKED}.{BLOCKED}.31.194:443
- {BLOCKED}.{BLOCKED}.131.94:443
- {BLOCKED}.{BLOCKED}.78.201:443
- {BLOCKED}.{BLOCKED}.152.131:443
- {BLOCKED}.{BLOCKED}.40.44:4443
- {BLOCKED}.{BLOCKED}.239.151:443
- {BLOCKED}.{BLOCKED}.239.151:4443
- {BLOCKED}.{BLOCKED}.190.84:443
- {BLOCKED}.{BLOCKED}.190.88:443
- {BLOCKED}.{BLOCKED}.214.203:443
- {BLOCKED}.{BLOCKED}.243.60:4443
- {BLOCKED}.{BLOCKED}:4443
- {BLOCKED}.{BLOCKED}.138.151:4443
- {BLOCKED}.{BLOCKED}.101.221:4443
- {BLOCKED}.{BLOCKED}:4443
- {BLOCKED}.{BLOCKED}.254.183:443
- {BLOCKED}.{BLOCKED}.241.244:4443
- {BLOCKED}.{BLOCKED}.96.214:443
- {BLOCKED}.{BLOCKED}.96.84:443
- {BLOCKED}.{BLOCKED}.97.215:4443
- {BLOCKED}.{BLOCKED}.97.216:443
- {BLOCKED}.{BLOCKED}.97.49:443
- {BLOCKED}.{BLOCKED}.98.128:443
- {BLOCKED}.{BLOCKED}.98.232:4443
- {BLOCKED}.{BLOCKED}.98.248:4443
- {BLOCKED}.{BLOCKED}.69.144:443
- {BLOCKED}.{BLOCKED}.69.151:4443
- {BLOCKED}.{BLOCKED}.69.159:4443
- {BLOCKED}.{BLOCKED}.69.172:4443
- {BLOCKED}.{BLOCKED}.175.138:443
- {BLOCKED}.{BLOCKED}.34.137:443
- {BLOCKED}.{BLOCKED}.250.93:443
- {BLOCKED}.{BLOCKED}.151.39:443
- {BLOCKED}.{BLOCKED}.228.155:443
- {BLOCKED}.{BLOCKED}.249.207:443
- {BLOCKED}.{BLOCKED}.109.116:443
- {BLOCKED}.{BLOCKED}.99.217:443
- {BLOCKED}.{BLOCKED}.74.70:443
- {BLOCKED}.{BLOCKED}.52.191:443
- {BLOCKED}.{BLOCKED}.52.192:443
- {BLOCKED}.{BLOCKED}.53.142:4443
- {BLOCKED}.{BLOCKED}.54.100:4443
- {BLOCKED}.{BLOCKED}.177.142:4443
- {BLOCKED}.{BLOCKED}.178.46:4443
- {BLOCKED}.{BLOCKED}.91.230:443
- {BLOCKED}.{BLOCKED}.195.147:443/account/1
- {BLOCKED}.{BLOCKED}.195.147:443/contact/1
- {BLOCKED}.{BLOCKED}.195.147:443/info/1
- {BLOCKED}.{BLOCKED}.195.147:443/login/1
- {BLOCKED}.{BLOCKED}.199.30:443
- {BLOCKED}.{BLOCKED}.88.84:4443
- {BLOCKED}.{BLOCKED}:4443
Other Details
This spyware connects to the following URL(s) to check for an Internet connection:
- google.com
- microsoft.com
It connects to the following URL(s) to get the affected system's IP address:
- http://icanhazip.com
It deletes the initially executed copy of itself
SOLUTION
9.700
11.520.06
17 Feb 2015
11.521.00
18 Feb 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
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.
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\googleupdate (For Windows XP and below)
Step 5
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 file name}.exe" (For Windows Vista and above)
- GoogleUpdate = "%AppDataLocal%\{random file name}.exe" (For Windows Vista and above)
Step 6
Search and delete this file
- %AppDataLocal%\nw9vbe8cb5.dll - (for Vista and higher)
- %System%\config\systemprofile\AppData\Local\nw9vbe8cb5.dll - (for Windows XP and lower)
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_DYRE.YUYBK. 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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