PUA.Win32.OfferCore.AO

This Potentially Unwanted Application 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 Potentially Unwanted Application 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 Potentially Unwanted Application drops the following files:

• %User Temp%\is-{Random Characters}.tmp\{Malware Name}.tmp → deleted afterwards
• %User Temp%\is-{Random Characters}.tmp\file_.tmp → deleted afterwards
• %User Temp%\is-{Random Characters}.tmp\botva2.dll → deleted afterwards
• %User Temp%\is-{Random Characters}.tmp\Helper.dll → deleted afterwards
• %User Temp%\is-{Random Characters}.tmp\file_.exe

(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).)

It adds the following processes:

• "%User Temp%\is-{Random Characters}.tmp\{Malware Name}.tmp" /SL5="$3402FE,832512,832512,{Malware Path}\{Malware Filename}"
• "%User Temp%\is-{Random Characters}.tmp\file_.exe" /LANG=en /NA=Rh85hR64
• "%User Temp%\is-{Random Characters}.tmp\file_.tmp" /SL5="$3E05C6,1611420,832512,%User Temp%\is-{Random Characters}.tmp\file_.exe" /LANG=en /NA=Rh85hR64

(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).)

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

• https://{BLOCKED}71dvafjw.cloudfront.net/installer/9483728320140705247/062028