Analysis by: Rhena Inocencio

ALIASES:

Trojan:Win32/Skeeyah.A!rfn (Microsoft), BackDoor-FCZO!0BB653E8AB44 (McAfee), Packed.Win32.Katusha.o (Kaspersky), Trj/Bedep.E (Panda)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size: 313,856 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 06 May 2016

Arrival Details

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other Details

This backdoor requires its main component to successfully perform its intended routine.

It does the following:

  • It opens the following existing files:
    • {malware path}\TXr4vr
    • {malware path}\qVTaVo8G

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.510.06
FIRST VSAPI PATTERN DATE: 06 May 2016
VSAPI OPR PATTERN File: 12.511.00
VSAPI OPR PATTERN Date: 07 May 2016

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 and note files detected as BKDR_BEDEP.SDGU

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

Search and delete the file detected as BKDR_BEDEP.SDGU

[ Learn More ]

Step 6

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.  
  • {malware path}\TXr4vr
  • {malware path}\qVTaVo8G

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_BEDEP.SDGU. 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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