Analysis by: Anthony Joe Melgarejo
ALIASES:

BehavesLike.Win32.Upatre.kt (McAfee), Troj/Upatre-LD (Sophos)

 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 attachment to mass-mailed email messages.

  TECHNICAL DETAILS

File Size: 65,536 bytes
File Type: EXE
Initial Samples Received Date: 18 Nov 2015

Arrival Details

This Trojan arrives as attachment to mass-mailed email messages.

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\criwekis.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 URL(s) to get the affected system's IP address:

  • http://myip.dnsomatic.com

It connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.109.48:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED.166.230:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.203.43:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.31.6:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.71.20:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.28.206:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.224.64:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.93.231:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.99.80:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.90.166:{random port}/17SAN1A/{Computer name}/0/{OS version}/0/{value}
  • http://{BLOCKED}.{BLOCKED}.89.57:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.57.155:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.197.50:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.42.3:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.68.78:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.207.78:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.199.121:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.217.188:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.131.116:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.20.53:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.85.9:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.24.50:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.201.105:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.82.80:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.76.211:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.64.45:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.25.233:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.251.174:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.175.114:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.191.142:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.108.254:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.249.139:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.236.122:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.172.232:443/pic_171.jpg
  • http://{BLOCKED}.{BLOCKED}.155.22:443/pic_171.jpg