HKTL_KEYGEN.GAVG
TrojanDownloader:Win32/Quireap.B (Microsoft), Artemis!1C96C2D6F836 (McAfee), Crack.AAC (AVG), Trojan.Gen (Symantec)
Windows
Threat Type: Hacking Tool
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This hacking tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.
It generates serial numbers to crack into programs that need valid serial numbers for the programs to function fully.
It uses a user interface (UI).
TECHNICAL DETAILS
Arrival Details
This hacking tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It may be manually installed by a user.
Installation
This hacking tool adds the following processes:
- %User Temp%\ns{5 random characters}.tmp\setup.exe
(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.)
It creates the following folders:
- %User Temp%\ns{5 random characters}.tmp
(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.)
Dropping Routine
This hacking tool drops the following files:
- %User Temp%\ns{5 random characters}.tmp\setup.exe - detected as HKTL_KEYGEN.GAVG
- %User Temp%\ns{5 random characters}.tmp\System.dll
- %User Temp%\ns{5 random characters}.tmp\NSISdl.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.)
Cracker Routine
This hacking tool generates serial numbers to crack into programs that need valid serial numbers for the programs to function fully.
Other Details
This hacking tool uses the following user interface:
NOTES:
It is used to generate valid serial keys for the following AVG Software:
SOLUTION
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 these folders
- %User Temp%\ns{5 random characters}.tmp
Step 4
Scan your computer with your Trend Micro product to delete files detected as HKTL_KEYGEN.GAVG. 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 this Knowledge Base page for more information.
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