Backdoor:OSX/Imuler.A (FSecure)
Mac OS X
Dropped by other malware
This backdoor may be dropped by other malware.
It runs certain commands that it receives remotely from a malicious user. Doing this puts the affected computer and information found on the computer at greater risk.
104,712 bytes
Mach-O
Yes
21 Mar 2012
Connects to URLs/IPs
Arrival Details
This backdoor may be dropped by the following malware:
Installation
This backdoor drops the following copies of itself into the affected system:
Autostart Technique
This backdoor drops the following files:
Backdoor Routine
This backdoor executes the following command(s) from a remote malicious user:
It connects to the following URL(s) to send and receive commands from a remote malicious user:
Download Routine
This backdoor accesses the following websites to download files:
It saves the files it downloads using the following names:
9.200
8.866.05
27 Mar 2012
8.867.00
27 Mar 2012
Step 1
Remove the malware/grayware file that dropped/downloaded OSX_IMULER.C
NOTES:
Step 2
Delete the autostart file used by this malware. To delete the autostart file, open a Terminal window and type the following command:
rm "/Users/{user name}/Library/LaunchAgents/checkvir.plist"
Step 3
Terminate the malware process. To terminate the malware process, open a Terminal window and perform the following:
ps -A
{number} ?? Ss {time} /Users/{user name}/Library/LaunchAgents/checkvir
Take note of the number. This number is the malware process ID (PID)kill {malware PID}
Step 4
Deleting the dropped files. To delete the dropped files, open a Terminal window and type the following commands:
rm /tmp/CurlUpload
rm /tmp/xntaskz
rm /tmp/xntaskz.gz
rm /tmp/launch-0rp.dat
Step 5
Scan your computer with your Trend Micro product to delete files detected as OSX_IMULER.C 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.
To open a Terminal window, double-click Applications > Utilities > Terminal in Finder.
To close the Terminal application, press ⌘ (Command) + Q.