Modified By:: Clive Fuentebella
 

Backdoor:Win32/Daserf.A (MICROSOFT); Trojan.Win32.Generic.pak!cobra (SUNBELT)

 PLATFORM:

Windows

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL::
 DISTRIBUTION POTENTIAL::
 REPORTED INFECTION:
 INFORMATION EXPOSURE:
Low
Medium
High
Critical

  • Threat Type:
    Backdoor

  • Destructiveness:
    No

  • Encrypted:
     

  • In the wild::
    Yes

  OVERVIEW

It 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: 27,648 bytes
File type: EXE
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 19 февраля 2020

Detalles de entrada

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

Rutina de infiltración

Infiltra los archivos siguientes:

  • %User Temp%\KB2791997.log
  • %User Temp%\perfc091.dat
  • %User Temp%\perfh091.dat

(Nota: %User Temp% es la carpeta Temp del usuario activo, que en el caso de Windows 2000(32-bit), XP y Server 2003(32-bit) suele estar en C:\Documents and Settings\{nombre de usuario}\Local Settings\Temp y en el case de Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) y 10(64-bit) en C:\Users\{nombre de usuario}\AppData\Local\Temp).

)

Otros detalles

It connects to the following possibly malicious URL:

  • http://key.{BLOCKED}upper.info