BKDR_POSTBOT.AUSR

 Analysis by: Byron Jon Gelera

 ALIASES:

Backdoor.Muirim (Norton)

 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.

  TECHNICAL DETAILS

File Size:

450,560 bytes

File Type:

EXE

Initial Samples Received Date:

21 Oct 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 System Modifications

This backdoor adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer
MMID = "{8 random characters}"

Other Details

This backdoor connects to the following possibly malicious URL:

  • www.{BLOCKED}one1.com/admin/design/sign/admin.php
  • {BLOCKED}one1.net/admin/design/sign/admin.php