Analysis by: Anthony Joe Melgarejo
ALIASES:

TrojanDownloader:Win32/Upatre (Microsoft), Upatre-FACE!2199CF384FC5 (McAfee), Trojan-Downloader.Win32.Upatre.eqhi (Kaspersky)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size: 45,568 bytes
File Type: EXE
Initial Samples Received Date: 02 Sep 2015

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 files:

  • %User Temp%\vojgebopa.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.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.203.43:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.49.11:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.247.74:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.31.6:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.123.210:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.94.38:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.38.100:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.193.74:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.231.104:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.191.245:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.199.21:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.215.76:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.103.27:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.197.50:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.68.78:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.49.117:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.138.154:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.231.11:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.210.122:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.217.188:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.131.116:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.20.53:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.144.177:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.159.18:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.156.246:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.36.52:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.236.173:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.229.215:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.156.165:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.195.6:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.197.54:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.201.222:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.201.61:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.242.203:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.171.44:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.204.114:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.10.116:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.82.80:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.81.120:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.30.156:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.45.226:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.160.146:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.120.214:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.76.211:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.64.45:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.104.170:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.142.189:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.116.76:443/nilk12.zip
  • http://{BLOCKED}.{BLOCKED}.130.9:443/nilk12.zip