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TROJ_UPATRE.YYSQU

November 30, 2015
 Analysis by: Homer Pacag
 ALIASES:

Trojan.Upatre (Malwarebytes); Trojan-Downloader.Win32.Upatre.fldf (Kaspersky);

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

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.

However, as of this writing, the said sites are inaccessible. It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size:

34.304 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

13 Nov 2015

Payload:

Downloads files, Steals information

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.

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}.{BLOCKED}.108.254:443
  • http://{BLOCKED}.{BLOCKED}.249.139:443
  • http://{BLOCKED}.{BLOCKED}.25.233:443
  • http://{BLOCKED}.{BLOCKED}.251.174:443
  • http://{BLOCKED}.{BLOCKED}.207.78:443
  • http://{BLOCKED}.{BLOCKED}.199.121:443
  • http://{BLOCKED}.{BLOCKED}.175.114:443
  • http://{BLOCKED}.{BLOCKED}.155.22:443
  • http://{BLOCKED}.{BLOCKED}.109.48:443
  • http://{BLOCKED}.{BLOCKED}.131.116:443
  • http://{BLOCKED}.{BLOCKED}.82.80:443
  • http://{BLOCKED}.{BLOCKED}.31.6:443
  • http://{BLOCKED}.{BLOCKED}.166.230:443
  • http://{BLOCKED}.{BLOCKED}.217.188:443
  • http://{BLOCKED}.{BLOCKED}.68.78:443
  • http://{BLOCKED}.{BLOCKED}.197.50:443
  • http://{BLOCKED}.{BLOCKED}.203.43:443
  • http://{BLOCKED}.{BLOCKED}.20.53:443
  • http://{BLOCKED}.{BLOCKED}.76.211:443
  • http://{BLOCKED}.{BLOCKED}.64.45:443
  • http://{BLOCKED}.{BLOCKED}.42.3:443
  • http://{BLOCKED}.{BLOCKED}.93.231:443
  • http://{BLOCKED}.{BLOCKED}.236.122:443
  • http://{BLOCKED}.{BLOCKED}.172.232:443
  • http://{BLOCKED}.{BLOCKED}.201.105:443
  • http://{BLOCKED}.{BLOCKED}.191.142:443
  • http://{BLOCKED}.{BLOCKED}.57.155:443
  • http://{BLOCKED}.{BLOCKED}.89.57:443
  • http://{BLOCKED}.{BLOCKED}.24.50:443
  • http://{BLOCKED}.{BLOCKED}.28.206:443
  • http://{BLOCKED}.{BLOCKED}.224.64:443
  • http://{BLOCKED}.{BLOCKED}.71.20:443
  • http://{BLOCKED}.{BLOCKED}.85.9:443
  • http://{BLOCKED}.{BLOCKED}.99.80:443

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Information Theft

This Trojan gathers the following data:

  • Computer Name
  • OS version
  • Service Pack

Other Details

This Trojan connects to the following URL(s) to get the affected system's IP address:

  • http://myip.dnsomatic.com/

However, as of this writing, the said sites are inaccessible.

It deletes the initially executed copy of itself

NOTES:

This Trojan connects to the following URL(s) to report infection of the affected system:

  • http://{BLOCKED}.{BLOCKED}.90.166:{port number}/12GAW12/{data}

It installs authentication certificates to enable access of download sites.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.150.04

FIRST VSAPI PATTERN DATE:

14 Nov 2015

VSAPI OPR PATTERN File:

12.151.00

VSAPI OPR PATTERN Date:

14 Nov 2015

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_UPATRE.YYSQU. 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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