Analysis by: Pearl Charlaine Espejo
ALIASES:

JS.Locky.IR (CAT-QuickHeal); JS/Locky.BE (Cyren); JS/TrojanDownloader.Nemucod.BLA (ESET-NOD32); Trojan-Ransom.Script.Locky (Ikarus); JS/Nemucod.pf (McAfee)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. 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

Tamaño del archivo 10,085 bytes
Tipo de archivo JS
Fecha de recepción de las muestras iniciales 08 Nov 2016

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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

Download Routine

This Trojan saves the files it downloads using the following names:

  • %User Temp%\XYzu7xUSyO98.dll

(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.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}niew.friko.pl/tijwn65r
  • http://{BLOCKED}oauto.net/tmbqhc
  • http://{BLOCKED}n.nl/twtsp
  • http://{BLOCKED}age.com/3z2390i
  • http://{BLOCKED}hirk.net/4bkz3b