PUA.Win32.DownloadAdmin.AA

February 20, 2019

Analysis by: Arvin Roi Macaraeg

ALIASES:

Win32/DownloadAdmin.D(NOD32), PUA/DownloadAdmin.Gen(ANTIVIR)

PLATFORM:

Windows

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

INFORMATION EXPOSURE:

Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted:
In the wild: Yes

OVERVIEW

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.

TECHNICAL DETAILS

File Size: 609,880 bytes

File Type: EXE

Memory Resident: No

Initial Samples Received Date: 27 Sep 2012

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%\nsl{random character}.tmp\System.dll
%User Temp%\nsl{random character}.tmp\lua51.dll
%User Temp%\nsl{random character}.tmp\LuaXml_lib.dll
%User Temp%\nsl{random character}.tmp\LuaBridge.dll
%User Temp%\nsl{random character}.tmp\definitions.lua
%User Temp%\nsl{random character}.tmp\utils.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\mime.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\ltn12.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\http.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\ftp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\tp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\smtp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\url.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\socket\core.dll
%User Temp%\nsl{random character}.tmp\LuaSocket\mime\core.dll
%User Temp%\nsl{random character}.tmp\LuaXml.lua
%User Temp%\nsl{random character}.tmp\json.lua
%User Temp%\nsl{random character}.tmp\luacom.dll
%User Temp%\nsl{random character}.tmp\extension.tlb
%User Temp%\nsl{random character}.tmp\GuiInit.lua
%User Temp%\nsl{random character}.tmp\DownloadList.lua
%User Temp%\nsl{random character}.tmp\Events.lua
%User Temp%\nsl{random character}.tmp\DownloadThread.lua
%User Temp%\nsl{random character}.tmp\IntegratedOffer.lua
%User Temp%\nsl{random character}.tmp\BrowserControl.lua
%User Temp%\nsl{random character}.tmp\res\jquery.js
%User Temp%\nsl{random character}.tmp\res\common.js
%User Temp%\nsl{random character}.tmp\res\common.css
%User Temp%\nsl{random character}.tmp\res\knockout.js
%User Temp%\nsl{random character}.tmp\download.com\accept.gif
%User Temp%\nsl{random character}.tmp\download.com\bg.gif
%User Temp%\nsl{random character}.tmp\download.com\cancel.gif
%User Temp%\nsl{random character}.tmp\download.com\close.gif
%User Temp%\nsl{random character}.tmp\download.com\decline.gif
%User Temp%\nsl{random character}.tmp\download.com\headicon.png
%User Temp%\nsl{random character}.tmp\download.com\iconCheck.png
%User Temp%\nsl{random character}.tmp\download.com\installNow.gif
%User Temp%\nsl{random character}.tmp\download.com\installOpen.gif
%User Temp%\nsl{random character}.tmp\download.com\later.gif
%User Temp%\nsl{random character}.tmp\download.com\loading.gif
%User Temp%\nsl{random character}.tmp\download.com\nextStep.gif
%User Temp%\nsl{random character}.tmp\download.com\progress.gif
%User Temp%\nsl{random character}.tmp\download.com\progressPause.gif
%User Temp%\nsl{random character}.tmp\download.com\progressPlay.gif
%User Temp%\nsl{random character}.tmp\download.com\step1of4.png
%User Temp%\nsl{random character}.tmp\__localxml.xml
%User Temp%\nsl{random character}.tmp\AdvancedTests.lua
%User Temp%\nsl{random character}.tmp\version.dll
%User Temp%\nsl{random character}.tmp\UACInfo.dll
%User Temp%\nsl{random character}.tmp\FloatingProgress.dll
%User Temp%\nsl{random character}.tmp\__web.xml
%User Temp%\nsw{random character}.tmp

SOLUTION

Minimum Scan Engine: 9.850

SSAPI PATTERN File: 2.142.50

SSAPI PATTERN Date: 31 Jan 2019

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Search and delete this file

[ Learn More ]

There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.

PUA.Win32.DownloadAdmin.AA
Drops the following files:
%User Temp%\nsl{random character}.tmp\System.dll
%User Temp%\nsl{random character}.tmp\lua51.dll
%User Temp%\nsl{random character}.tmp\LuaXml_lib.dll
%User Temp%\nsl{random character}.tmp\LuaBridge.dll
%User Temp%\nsl{random character}.tmp\definitions.lua
%User Temp%\nsl{random character}.tmp\utils.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\mime.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\ltn12.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\http.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\ftp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\tp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\smtp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\url.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\socket\core.dll
%User Temp%\nsl{random character}.tmp\LuaSocket\mime\core.dll
%User Temp%\nsl{random character}.tmp\LuaXml.lua
%User Temp%\nsl{random character}.tmp\json.lua
%User Temp%\nsl{random character}.tmp\luacom.dll
%User Temp%\nsl{random character}.tmp\extension.tlb
%User Temp%\nsl{random character}.tmp\GuiInit.lua
%User Temp%\nsl{random character}.tmp\DownloadList.lua
%User Temp%\nsl{random character}.tmp\Events.lua
%User Temp%\nsl{random character}.tmp\DownloadThread.lua
%User Temp%\nsl{random character}.tmp\IntegratedOffer.lua
%User Temp%\nsl{random character}.tmp\BrowserControl.lua
%User Temp%\nsl{random character}.tmp\res\jquery.js
%User Temp%\nsl{random character}.tmp\res\common.js
%User Temp%\nsl{random character}.tmp\res\common.css
%User Temp%\nsl{random character}.tmp\res\knockout.js
%User Temp%\nsl{random character}.tmp\download.com\accept.gif
%User Temp%\nsl{random character}.tmp\download.com\bg.gif
%User Temp%\nsl{random character}.tmp\download.com\cancel.gif
%User Temp%\nsl{random character}.tmp\download.com\close.gif
%User Temp%\nsl{random character}.tmp\download.com\decline.gif
%User Temp%\nsl{random character}.tmp\download.com\headicon.png
%User Temp%\nsl{random character}.tmp\download.com\iconCheck.png
%User Temp%\nsl{random character}.tmp\download.com\installNow.gif
%User Temp%\nsl{random character}.tmp\download.com\installOpen.gif
%User Temp%\nsl{random character}.tmp\download.com\later.gif
%User Temp%\nsl{random character}.tmp\download.com\loading.gif
%User Temp%\nsl{random character}.tmp\download.com\nextStep.gif
%User Temp%\nsl{random character}.tmp\download.com\progress.gif
%User Temp%\nsl{random character}.tmp\download.com\progressPause.gif
%User Temp%\nsl{random character}.tmp\download.com\progressPlay.gif
%User Temp%\nsl{random character}.tmp\download.com\step1of4.png
%User Temp%\nsl{random character}.tmp\__localxml.xml
%User Temp%\nsl{random character}.tmp\AdvancedTests.lua
%User Temp%\nsl{random character}.tmp\version.dll
%User Temp%\nsl{random character}.tmp\UACInfo.dll
%User Temp%\nsl{random character}.tmp\FloatingProgress.dll
%User Temp%\nsl{random character}.tmp\__web.xml
%User Temp%\nsw{random character}.tmp

To manually delete a malware/grayware file from an affected system:

• For Windows 2000, Windows XP, and Windows Server 2003:

Right-click Start then click Search....
In the File name* input box, type the following:

PUA.Win32.DownloadAdmin.AA
Drops the following files:
%User Temp%\nsl{random character}.tmp\System.dll
%User Temp%\nsl{random character}.tmp\lua51.dll
%User Temp%\nsl{random character}.tmp\LuaXml_lib.dll
%User Temp%\nsl{random character}.tmp\LuaBridge.dll
%User Temp%\nsl{random character}.tmp\definitions.lua
%User Temp%\nsl{random character}.tmp\utils.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\mime.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\ltn12.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\http.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\ftp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\tp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\smtp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\url.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\socket\core.dll
%User Temp%\nsl{random character}.tmp\LuaSocket\mime\core.dll
%User Temp%\nsl{random character}.tmp\LuaXml.lua
%User Temp%\nsl{random character}.tmp\json.lua
%User Temp%\nsl{random character}.tmp\luacom.dll
%User Temp%\nsl{random character}.tmp\extension.tlb
%User Temp%\nsl{random character}.tmp\GuiInit.lua
%User Temp%\nsl{random character}.tmp\DownloadList.lua
%User Temp%\nsl{random character}.tmp\Events.lua
%User Temp%\nsl{random character}.tmp\DownloadThread.lua
%User Temp%\nsl{random character}.tmp\IntegratedOffer.lua
%User Temp%\nsl{random character}.tmp\BrowserControl.lua
%User Temp%\nsl{random character}.tmp\res\jquery.js
%User Temp%\nsl{random character}.tmp\res\common.js
%User Temp%\nsl{random character}.tmp\res\common.css
%User Temp%\nsl{random character}.tmp\res\knockout.js
%User Temp%\nsl{random character}.tmp\download.com\accept.gif
%User Temp%\nsl{random character}.tmp\download.com\bg.gif
%User Temp%\nsl{random character}.tmp\download.com\cancel.gif
%User Temp%\nsl{random character}.tmp\download.com\close.gif
%User Temp%\nsl{random character}.tmp\download.com\decline.gif
%User Temp%\nsl{random character}.tmp\download.com\headicon.png
%User Temp%\nsl{random character}.tmp\download.com\iconCheck.png
%User Temp%\nsl{random character}.tmp\download.com\installNow.gif
%User Temp%\nsl{random character}.tmp\download.com\installOpen.gif
%User Temp%\nsl{random character}.tmp\download.com\later.gif
%User Temp%\nsl{random character}.tmp\download.com\loading.gif
%User Temp%\nsl{random character}.tmp\download.com\nextStep.gif
%User Temp%\nsl{random character}.tmp\download.com\progress.gif
%User Temp%\nsl{random character}.tmp\download.com\progressPause.gif
%User Temp%\nsl{random character}.tmp\download.com\progressPlay.gif
%User Temp%\nsl{random character}.tmp\download.com\step1of4.png
%User Temp%\nsl{random character}.tmp\__localxml.xml
%User Temp%\nsl{random character}.tmp\AdvancedTests.lua
%User Temp%\nsl{random character}.tmp\version.dll
%User Temp%\nsl{random character}.tmp\UACInfo.dll
%User Temp%\nsl{random character}.tmp\FloatingProgress.dll
%User Temp%\nsl{random character}.tmp\__web.xml
%User Temp%\nsw{random character}.tmp
In the Look In drop-down list, select My Computer then press Enter.
Once located, select the file then press SHIFT+DELETE to delete it.
*Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

• For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

Open a Windows Explorer window.
- For Windows Vista, 7, and Server 2008 users, click Start>Computer.
- For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
In the Search Computer/This PC input box, type:

PUA.Win32.DownloadAdmin.AA
Drops the following files:
%User Temp%\nsl{random character}.tmp\System.dll
%User Temp%\nsl{random character}.tmp\lua51.dll
%User Temp%\nsl{random character}.tmp\LuaXml_lib.dll
%User Temp%\nsl{random character}.tmp\LuaBridge.dll
%User Temp%\nsl{random character}.tmp\definitions.lua
%User Temp%\nsl{random character}.tmp\utils.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\mime.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\ltn12.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\http.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\ftp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\tp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\smtp.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\lua\socket\url.lua
%User Temp%\nsl{random character}.tmp\LuaSocket\socket\core.dll
%User Temp%\nsl{random character}.tmp\LuaSocket\mime\core.dll
%User Temp%\nsl{random character}.tmp\LuaXml.lua
%User Temp%\nsl{random character}.tmp\json.lua
%User Temp%\nsl{random character}.tmp\luacom.dll
%User Temp%\nsl{random character}.tmp\extension.tlb
%User Temp%\nsl{random character}.tmp\GuiInit.lua
%User Temp%\nsl{random character}.tmp\DownloadList.lua
%User Temp%\nsl{random character}.tmp\Events.lua
%User Temp%\nsl{random character}.tmp\DownloadThread.lua
%User Temp%\nsl{random character}.tmp\IntegratedOffer.lua
%User Temp%\nsl{random character}.tmp\BrowserControl.lua
%User Temp%\nsl{random character}.tmp\res\jquery.js
%User Temp%\nsl{random character}.tmp\res\common.js
%User Temp%\nsl{random character}.tmp\res\common.css
%User Temp%\nsl{random character}.tmp\res\knockout.js
%User Temp%\nsl{random character}.tmp\download.com\accept.gif
%User Temp%\nsl{random character}.tmp\download.com\bg.gif
%User Temp%\nsl{random character}.tmp\download.com\cancel.gif
%User Temp%\nsl{random character}.tmp\download.com\close.gif
%User Temp%\nsl{random character}.tmp\download.com\decline.gif
%User Temp%\nsl{random character}.tmp\download.com\headicon.png
%User Temp%\nsl{random character}.tmp\download.com\iconCheck.png
%User Temp%\nsl{random character}.tmp\download.com\installNow.gif
%User Temp%\nsl{random character}.tmp\download.com\installOpen.gif
%User Temp%\nsl{random character}.tmp\download.com\later.gif
%User Temp%\nsl{random character}.tmp\download.com\loading.gif
%User Temp%\nsl{random character}.tmp\download.com\nextStep.gif
%User Temp%\nsl{random character}.tmp\download.com\progress.gif
%User Temp%\nsl{random character}.tmp\download.com\progressPause.gif
%User Temp%\nsl{random character}.tmp\download.com\progressPlay.gif
%User Temp%\nsl{random character}.tmp\download.com\step1of4.png
%User Temp%\nsl{random character}.tmp\__localxml.xml
%User Temp%\nsl{random character}.tmp\AdvancedTests.lua
%User Temp%\nsl{random character}.tmp\version.dll
%User Temp%\nsl{random character}.tmp\UACInfo.dll
%User Temp%\nsl{random character}.tmp\FloatingProgress.dll
%User Temp%\nsl{random character}.tmp\__web.xml
%User Temp%\nsw{random character}.tmp
Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.

Step 4

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.DownloadAdmin.AA. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:

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PUA.Win32.DownloadAdmin.AA

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