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TROJ_REDOSDRU.XPV

June 08, 2017
 Analysis by: Jennifer Gumban
 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

As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

1,887,936 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 Aug 2015

Payload:

Downloads files

Arrival Details

This Trojan may be downloaded from the following remote site(s):

  • http://{BLOCKED}.{BLOCKED}.214.228:80/winhost.exe
  • http://{BLOCKED}.{BLOCKED}.214.228:80/cry/winhost.exe
  • http://{BLOCKED}.{BLOCKED}.214.228/winhost.exe
  • http://{BLOCKED}.{BLOCKED}.214.228/win32/winhost.exe
  • http://{BLOCKED}.{BLOCKED}.106.27:280/winhost.exe
  • http://down.51-cs.cn/dhl.exe

This malware arrives via the following means:

  • PE_NESHTA.A

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}n.51-cs.cn/protect.dll

It saves the files it downloads using the following names:

  • %Program Files%\AppPatch\protect.dll

(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

As of this writing, the said sites are inaccessible.

Other Details

This Trojan does the following:

  • Checks for presence of known debuggers and analysis tools.
  • Checks for presence of Wine emulator.
  • Checks for presence of VirtualBox.

  SOLUTION

Minimum Scan Engine:

9.850

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 clean files detected as TROJ_REDOSDRU.XPV. 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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