Prevx Research Division
A1.EXE
Password StealerFree PC Cleanup from Webroot
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Associated Malware Groups
The unsafe files using this name are associated with the malware groups:
- Password Stealer
- Cloaked Malware
- Malicious Software
File Behavior
A1.EXE has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- Writes to another Process's Virtual Memory (Process Hijacking)
- This process creates other processes on disk
- Executes a Process
- Registers a Dynamic Link Library File
- Injects code into other processes
- This Process Deletes Other Processes From Disk
- Violates Windows/Vista Physical Memory Protection allowing it to look inside the data areas of other programs
- Found on infected systems and resists interrogation by security products
- Drops known malicious software during execution
- Modifies fixed, removable or USB drives using autorun to execute or spread infection
- Can communicate with other computer systems using HTTP protocols
- Adds a Registry Key (RUN) to auto start Programs on system start up
- Terminates Processes
- Copies files
- Executes Processes stored in Temporary Folders
- Injects code into other processes
- Enables an In Process Object/Server - Common with DLL Injections
- Hooks the WININET.DLL function allowing it to read or copy Http and Https web page content and session information
A1.EXE has been the subject of the following behavior:
- Created as a process on disk
- Executed as a Process
- Has code inserted into its Virtual Memory space by other programs
- Deleted as a process from disk
- Terminated as a Process
- Registered as a Dynamic Link Library File
- Executed from Temporary Folders
- Added as a Registry auto start to load Program on Boot up
- Copied to multiple locations on the system
- This program is often downloaded from the web
Country Of Origin
The filename A1.EXE was first seen on Sep 23 2007 in the following geographical regions of the Webroot community:
- Italy on Sep 23 2007
- Spain on Sep 23 2007
- on Aug 30 2008
- The United States on Aug 30 2008
- Hong Kong on Jul 6 2009
- Taiwan on Sep 20 2009
- The United Kingdom on Jul 22 2010
Filesizes
The following file size has been seen:
- 50,390 bytes
- 43,573 bytes
- 125,410 bytes
- 17,920 bytes
- 86,016 bytes
- 124,416 bytes
- 102,683 bytes
- 125,440 bytes
- 184,596 bytes
File Type
The filename A1.EXE refers to many versions of an executable program.
File Activity
One or more files with the name A1.EXE creates, deletes, copies or moves the following files and folders:
- Deletes c:\windows\system32\drivers\cdaudio.sys
- Copies file\dllcache\cdaudio.sys to c:\windows\system32\drivers\cdaudio.sys
- Deletes c:\docume~1\user\locals~1\temp\uret463.exe
- Deletes c:\docume~1\user\locals~1\temp\lhgjyit0.dll
- Creates c:\docume~1\user\locals~1\temp\lhgjyit0.dll
- Creates c:\windows\system32\c.exe
- Deletes c:\windows\system32\c.exe
- Deletes c:\u99.ex
- Copies filec:\docume~1\user\locals~1\temp\uret463.exe to c:\u99.ex
- Deletes c:\autorun.in
- Creates c:\autorun.in
- Deletes d:\u99.ex
- Copies filec:\docume~1\user\locals~1\temp\uret463.exe to d:\u99.ex
- Deletes d:\autorun.in
- Creates d:\autorun.in
- Deletes c:\docume~1\user\locals~1\temp\at1.rar
- Deletes c:\docume~1\user\locals~1\temp\at.exe
- Deletes c:\docume~1\user\locals~1\temp\a11.rar
- Deletes c:\docume~1\user\locals~1\temp\a1.exe
- Deletes c:\docume~1\user\locals~1\temp\am.ex
- Deletes c:\q1alx.ex
- Copies filec:\docume~1\user\locals~1\temp\olhrwef.exe to c:\q1alx.ex
- Deletes d:\q1alx.ex
- Copies filec:\docume~1\user\locals~1\temp\olhrwef.exe to d:\q1alx.ex
- Creates c:\docume~1\user\locals~1\temp\at1.rar
- Creates c:\docume~1\user\locals~1\temp\at.exe
- Copies file4Æ_CHAR(0x03)_ PÆ_CHAR(0x03)_ tÆ_CHAR(0x03)_ ˜Æ_CHAR(0x03)_ ·ì_CHAR(0x01)_ èÆ_CHAR(0x03)_ _CHAR(0x08)_Ç_CHAR(0x03)_ _CHAR(0x1C)_Ç_CHAR(0x03)_ êÔ ou_CHAR(0x03)_ \dllcache\cdaudio.sys to c:\windows\system32\drivers\cdaudio.sys
- Deletes c:\windows\system32\e8main0.dll
- Creates c:\windows\system32\e8main0.dll
- Copies filec:\windows\notepad.exe to c:\windows\AhnRpta.exe
- Deletes c:\docume~1\user\locals~1\temp\am2.txt
- Copies file˜Æ_CHAR(0x03)_ ÌÆ_CHAR(0x03)_ èÆ_CHAR(0x03)_ _CHAR(0x08)_Ç_CHAR(0x03)_ ·ì_CHAR(0x01)_ (Ç_CHAR(0x03)_ <Ç_CHAR(0x03)_ LÇ_CHAR(0x03)_ êÔ ou_CHAR(0x03)_ \dllcache\cdaudio.sys to c:\windows\system32\drivers\cdaudio.sys
- Deletes c:\docume~1\user\locals~1\temp\huwesa.exe
- Copies filec:\docume~1\user\locals~1\temp\at.exe to c:\docume~1\user\locals~1\temp\huwesa.exe
- Deletes c:\docume~1\user\locals~1\temp\843wee0.dll
- Creates c:\docume~1\user\locals~1\temp\843wee0.dll
- Creates c:\docume~1\user\locals~1\temp\a11.rar
- Creates c:\docume~1\user\locals~1\temp\am2.txt
- Creates c:\docume~1\user\locals~1\temp\a1.exe
- Creates c:\docume~1\user\locals~1\temp\am.exe
- Deletes c:\docume~1\user\locals~1\temp\am.exe
- Copies filec:\docume~1\user\locals~1\temp\a1.exe to c:\docume~1\user\locals~1\temp\uret463.exe
- Deletes c:\docume~1\user\locals~1\temp\lhgjyit1.dll
- Creates c:\docume~1\user\locals~1\temp\lhgjyit1.dll
- Deletes c:\docume~1\user\locals~1\temp\olhrwef.exe
- Copies filec:\docume~1\user\locals~1\temp\am.exe to c:\docume~1\user\locals~1\temp\olhrwef.exe
- Deletes c:\docume~1\user\locals~1\temp\nmdfgds0.dll
- Creates c:\docume~1\user\locals~1\temp\nmdfgds0.dll
Website Activity
One or more files with the name A1.EXE interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.
- TCP:127.0.0.1:1097 Port:17
- Port 80 IP:60.217.58.87
- sderfg .com / 1m / c .rar
- TCP:127.0.0.1:1105 Port:17
- nhjui9 .net / 1mg / am1 .txt
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