OSX_KEYDNAP.J
OSX/Keydnap.A (NOD32), Backdoor:MacOS_X/Keydnap.A (Microsoft)
Mac OS X
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This Backdoor 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 dropped by other malware.
It steals certain information from the system and/or the user.
TECHNICAL DETAILS
3,035,136 bytes
Mach-O
Yes
15 Sep 2016
Steals information, Compromises system security
Arrival Details
This Backdoor 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 dropped by the following malware:
- OSX_DROPPER.A
Installation
This Backdoor adds the following processes:
- icloudproc
- License.rtf
- icloudsyncd
- /usr/libexec/icloudsyncd -launchd netlogon.bundle
Backdoor Routine
This Backdoor connects to the following URL(s) to send and receive commands from a remote malicious user:
- http://{BLOCKED}citdpqa7tv.onion/api/osx
Dropping Routine
This Backdoor drops the following files:
- /Applications/Transmission.app/Contents/Resources/License.rtf
- /Volumes/Transmission/Transmission.app/Contents/Resources/License.rtf
- $HOME/Library/Application Support/com.apple.iCloud.sync.daemon/icloudsyncd
- $HOME/Library/Application Support/com.apple.iCloud.sync.daemon/process.id
- $HOME/Library/LaunchAgents/com.apple.iCloud.sync.daemon.plist
- /Library/Application Support/com.apple.iCloud.sync.daemon/
- $HOME/Library/LaunchAgents/com.geticloud.icloud.photo.plist
Information Theft
This Backdoor steals the following information:
- Keychain credentials
Other Details
This Backdoor does the following:
- Uses local TOR as proxy
- Uses a legitimate code signing key for the malicious Transmission application bundle
- It has the following capabilities:
- -download/upload files
- -create processes
- -update self
- -steal user credentials
SOLUTION
9.800
12.778.06
15 Sep 2016
12.779.00
16 Sep 2016
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.
NOTES:
Terminate a malware/grayware process. This step allows you to disable the process files running in memory in preparation for the next steps.
- icloudproc
- License.rtf
- icloudsyncd
- /usr/libexec/icloudsyncd -launchd netlogon.bundle
Search and delete these files:
Scan your computer with your Trend Micro product to delete files detected as OSX_KEYDNAP.J. 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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