TROJ_MDROP.AIK
Mac OS X
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet, Spammed via email
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Once a malware successfully exploits the said vulnerability, it causes certain actions to be done on the system.
TECHNICAL DETAILS
Varies
DOC
No
14 Feb 2013
Drops files
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Dropping Routine
This Trojan takes advantage of the following software vulnerabilities to drop malicious files:
- Vulnerabilities in certain versions of Microsoft Office Word
Other Details
Once a malware successfully exploits the said vulnerability, it causes the following actions to be done on the system:
- Drops the following files:
/tmp/l - OSX Backdoor
/tmp/l.doc - Normal document file
/tmp/l.sh - bash file to open its dropped normal document file and execute the OSX backdoor
More information on this vulnerability can be found below:
- http://about-threats.trendmicro.com/us/archive/vulnerability.aspx?name=(ms09-027)%20vulnerabilities%20in%20microsoft%20office%20word%20could%20allow%20remote%20code%20execution%20(969514)
SOLUTION
9.300
9.724.06
14 Feb 2013
9.725.00
14 Feb 2013
Step 1
Scan your computer with your Trend Micro product to delete files detected as TROJ_MDROP.AIK. 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.
Step 2
Download and apply these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.
NOTES:
To delete the dropped file:
- Open a Terminal window. To open a terminal window, double-click "Applications > Utilities > Terminal" in Finder.
- In the Terminal window, type the following command:
rm /tmp/l
rm /tmp/l.doc
rm /tmp/l.sh
- Close Terminal by pressing (Command) + Q.
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