ALS_PASSDOC.AD
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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
Varies
LSP
No
11 Jan 2012
Drops files
Arrival Details
This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
NOTES:
It is an AutoCAD LISP script that spreads by copying itself to AutoCAD's working folder. If first locates the directory of the following files:
- ACAD.MNL
- ACAD.EXE
- DWGNAME
- {path of ACAD.MNL}\acaddoc.lsp
- {path of ACAD.EXE}\support\acaddoc.lsp
- {path of DWGNAME}\acaddoc.lsp
When an AutoCAD drawing file is opened, this script is also executed. It disables the following AutoCAD commands:
- EXPLODE
- LINE
- XREF
- ACADLSPASDOC
- cmdecho
- sdi
It also loads the file acadapq.lsp.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Scan your computer with your Trend Micro product to delete files detected as ALS_PASSDOC.AD. 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.
Did this description help? Tell us how we did.