Analysis by: Miguel Carlo Ang
ALIASES:

TrojanDownloader:W97M/Donoff(Microsoft);Trojan-Downloader.MSExcel.Agent.ak(Kaspersky);W97M/Generic(AVG)

 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 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: 66,048 bytes
File Type: XLS
Memory Resident: No
Initial Samples Received Date: 09 Jul 2015

Arrival Details

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

Installation

This Trojan drops the following files:

  • %User Temp%\8.exe
  • %User Temp%\26417.bat
  • %User Temp%\26417.vbs

(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}powers.com/wp-content/plugins/my-calendar/kaka.txt
  • http://{BLOCKED}powers.com/wp-content/plugins/my-calendar/6727156315273.txt
  • http://{BLOCKED}nia.com/wp-content/themes/twentytwelve/6727156315273.txt
  • http://{BLOCKED}nia.com/wp-content/themes/twentytwelve/kaka.txt
  • http://{BLOCKED}tmarkers.com/wp-content/plugins/really-simple-captcha/pa.exe
  • http://{BLOCKED}c.su/5751812.jpg
  • http://{BLOCKED}c.su/5757956.jpg