TROJ_ZURGOP.APES
TrojanDownloader:Win32/Dofoil.T (Microsoft); Trojan.Win32.Sharik.tab (Kaspersky); RDN/Generic Downloader.x!kl (McAfee); Trojan.Gen.SMH (Symantec)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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.
It does not have any propagation routine.
It does not have any backdoor routine.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
EXE
Yes
02 Jul 2014
Connects to URLs/IPs, Downloads files
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.
Installation
This Trojan adds the following folders:
- %Application Data%\{random folder 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, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
It drops the following copies of itself into the affected system and executes them:
- %Application Data%\{random folder name}\{random filename}.exe
(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
It adds the following processes:
- svchost.exe
It stays memory-resident by injecting codes into the following processes:
- svchost.exe
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
{random} = "%Application Data%\{random folder name}\{random filename}.exe"
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Download Routine
This Trojan accesses the following websites to download files:
- http://{BLOCKED}rveryu788.com
It saves the files it downloads using the following names:
- %User Temp%\{random}.tmp.exe
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
As of this writing, the said sites are inaccessible.
Other Details
This Trojan connects to the following URL(s) to check for an Internet connection:
- http://www.msn.com
NOTES:
This malware trick the user that it is a legitimate process by connecting to the following non-malicious sites:
- http://ui.skype.com/ui/0/4.2.0.169/en/help
- http://go.microsoft.com/fwlink/?LinkId={value}
- http://www.vmware.com
- http://www.activestate.com/Support/index.html
- http://jpsoft.com/forums.htm
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
9.700
10.898.04
02 Jul 2014
10.899.00
03 Jul 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
Scan your computer with your Trend Micro product and note files detected as TROJ_ZURGOP.APES
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\Policies\Explorer\Run
- {random} = "%Application Data%\{random folder name}\{random filename}.exe"
- {random} = "%Application Data%\{random folder name}\{random filename}.exe"
Step 5
Search and delete this folder
- %Application Data%\{random folder name}
Step 6
Search and delete this file
- %User Temp%\{random}.tmp.exe
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_ZURGOP.APES. 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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