TROJ_UPATRE.DX
Downloader.Upatre (Symantec); TrojanDownloader:Win32/Upatre.BD (Microsoft); Trojan-Downloader.Win32.Upatre (A) (Emsisoft)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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 deletes itself after execution.
TECHNICAL DETAILS
46,080 bytes
EXE
No
12 May 2015
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 drops the following copies of itself into the affected system and executes them:
- %User Temp%\tcp_setup.exe
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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 files:
- %User Temp%\tcp_9BB6.log
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)
Download Routine
This Trojan accesses the following websites to download files:
- {BLOCKED}.{BLOCKED}.109.65
- {BLOCKED}.{BLOCKED}.97.45
- {BLOCKED}.{BLOCKED}.59.234
- {BLOCKED}.{BLOCKED}.97.54
- {BLOCKED}.{BLOCKED}.220.102
- {BLOCKED}.{BLOCKED}.97.38
- {BLOCKED}.{BLOCKED}.130.90
- {BLOCKED}.{BLOCKED}.97.64
- {BLOCKED}.{BLOCKED}.97.66
Other Details
This Trojan connects to the following URL(s) to get the affected system's IP address:
- icanhazip.com
It deletes itself after execution.