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TROJ_UPATRE.SJR

November 23, 2015
 Analysis by: Sammy Chua
 ALIASES:

Troj/Upatre-LD (Sophos); TrojanDownloader:Win32/Upatre (Microsoft); Downloader.Upatre (Symantec)

 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 executes then deletes itself afterward.

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 gathers information and reports it to its servers.

  TECHNICAL DETAILS

File Size:

51,712 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 Nov 2015

Payload:

Downloads files, Steals information, Connects to URLs/IPs

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 adds the following processes:

  • svchost.exe

It executes then deletes itself afterward.

It injects codes into the following process(es):

  • created svchost.exe

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:

  • https://{BLOCKED}.{BLOCKED}.52.89/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.11.51/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.129.116/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.203.43/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.247.74/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.31.6/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.223.45/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.117.66/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.64.160/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.93.231/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.164.10/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.38.182/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.199.21/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.116.190/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.56.126/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.89.57/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.57.155/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.197.50/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.68.78/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.138.154/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.217.188/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.131.116/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.20.53/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.144.177/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.114.26/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.16.162/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.14.163/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.99.121/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.24.50/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.13.21/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.135.178/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.201.105/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.201.61/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.242.203/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.171.44/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.204.114/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.82.80/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.101.67/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.233.105/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.76.211/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.64.45/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.65.67/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.168.205/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.236.122/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.236.148/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.172.232/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.155.22/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.82.239/broli1.rar
  • https://{BLOCKED}.{BLOCKED}.82.66/broli1.rar

It saves the files it downloads using the following names:

  • %User Temp%\{random}.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 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.

Other Details

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

  • http://icanhazip.com/

It gathers the following information and reports it to its servers:

  • Computer Name
  • OS version
  • Service Pack
  • IP Address

NOTES:

This Trojan connects to the URL http://{BLOCKED}.{BLOCKED}.90.166:{random port}/14BR11/{machine name}/{data} to report infection of the affected system. The variable {random port} is 12212,12213,12214 or 12215.

  SOLUTION

Minimum Scan Engine:

9.8

FIRST VSAPI PATTERN FILE:

12.142.01

FIRST VSAPI PATTERN DATE:

10 Nov 2015

VSAPI OPR PATTERN File:

12.143.00

VSAPI OPR PATTERN Date:

11 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

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • %User Temp%\{random}.exe

Step 4

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