TROJ_UPATRE.OHH
TrojanDownloader:Win32/Upatre.A (Microsoft), Trojan.Downloader.JQCN (BitDefender), Trojan.DownLoad3.28161 (DrWeb), Trojan.Downloader.JQCN (B) (Emsisoft), Generic Downloader.z (McAfee)
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 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.
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.
It does not have any information-stealing capability.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
23,040 bytes
EXE
No
10 Oct 2013
Connects to URLs/IPs, Downloads files
Arrival Details
This Trojan 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 drops the following copies of itself into the affected system:
- %User Temp%\elefo.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.)
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- http://{BLOCKED}rpara2.com/wp-config/9ev.exe
It saves the files it downloads using the following names:
- %User Temp%\elefes.exe - detected as TSPY_ZBOT.PTL
(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.
Information Theft
This Trojan does not have any information-stealing capability.
Other Details
This Trojan deletes the initially executed copy of itself
NOTES:
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
9.700
10.356.02
21 Oct 2013
10.357.00
22 Oct 2013
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
Remove malware/grayware files dropped/downloaded by TROJ_UPATRE.OHH
- TSPY_ZBOT.PTL
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_UPATRE.OHH. 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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