TSPY_GARVEEP.A
TrojanDownloader:Win32/Garveep.B (Microsoft)
Windows
Threat Type: Trojan Spy
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Trojan Spy arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It does not have any propagation routine.
It does not have any backdoor routine.
TECHNICAL DETAILS
Arrival Details
This Trojan Spy arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It 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 Trojan Spy drops the following copies of itself into the affected system:
- %Application Data%\Microsoft\Media Player\DRM251\msime32.exe -> this will be dropped if the filename of the malware is "autorun.exe". Also, if there is an existing file, "%Application Data%\Microsoft\Media Player\DRM251\msime32.exe", the copy will not be dropped.
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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 creates the following folders:
- %Application Data%\Microsoft\Media Player
- %Application Data%\Microsoft\Media Player\DRM251
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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:
- 720110106
Autostart Technique
This Trojan Spy adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
msime32.exe = "%Application Data%\Microsoft\Media Player\DRM251\msime32.exe"
Note: This autostart registry entry will not be created if the malware does not successfully drop its copy mentioned above
Propagation
This Trojan Spy does not have any propagation routine.
Backdoor Routine
This Trojan Spy does not have any backdoor routine.
Information Theft
This Trojan Spy gathers the following data:
- System User/Username
- CPU information
- Language information
- Operating System Information
- Number of USBs attached to the machine
- Network Card Information
Other Details
This Trojan Spy does the following:
- It does not continue its malicious routines if it finds any of the following virtual machine-related strings from the above-mentioned system information:
- VMWARE
- QEMU
- 192.168.100.
- Checks if the following process are running in the system:
- UfSeAgnt.exe
- avp.exe
- avgtray.exe
- RavMonD.exe
- bdagent.exe
- V3LSvc.exe
If one of the processes mentioned is found running, the malware will terminate and will not proceed with its malicious routines.
NOTES:
Upon execution, it connects to a malicious server to report infection and to download a file:
- {BLOCKED}bile.200gigs.com
- {BLOCKED}eck.000page.com
- {BLOCKED}atefree.zoka.cc
- {BLOCKED}shhh.hostmefree.org
- {BLOCKED}cy.yaahosting.info
- {BLOCKED}tion.verwalten.ch
- {BLOCKED}tch.createandhost.com
- {BLOCKED}ile.x4host.eu
- {BLOCKED}te.eg.vg
- {BLOCKED}efreee.my5gigs.com
It will then send the following HTTP request to its C&C server:
- http://{Malicious Server}/patch/chkupdate.php?a1={Base64 of Encrypted parameter}&a2={Encrypted Physical Address of the infected machine}&a3={Base64 of Encrypted gathered information}
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
- msime32.exe = "%Application Data%\Microsoft\Media Player\DRM251\msime32.exe"
- msime32.exe = "%Application Data%\Microsoft\Media Player\DRM251\msime32.exe"
Step 5
Search and delete these folders
- %Application Data%\Microsoft\Media Player
- %Application Data%\Microsoft\Media Player\DRM251
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_GARVEEP.A. 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 7
Scan your computer with your Trend Micro product to delete files detected as TSPY_GARVEEP.A. 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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