Loki - Simple IOC Scanner
Scanner for Simple Indicators of Compromise
Detection is based on four detection methods:
1. File Name IOC Regex match on full file path/name 2. Yara Rule Check Yara signature match on file data and process memory 3. Hash check Compares known malicious hashes (MD5, SHA1, SHA256) with scanned files
The Windows binary is compiled with PyInstaller 2.1 and should run as x86 application on both x86 and x64 based systems.
How-To Run LOKI and Analyse the Reports
- Download the program archive via the button "Download ZIP" on the right sidebar
- Unpack LOKI locally
- Provide the folder to a target system that should be scanned: removable media, network share, folder on target system
- Right-click on loki.exe and select "Run as Administrator" or open a command line "cmd.exe" as Administrator and run it from there (you can also run LOKI without administrative privileges but some checks will be disabled and relevant objects on disk will not be accessible)
- The resulting report will show a GREEN, YELLOW or RED result line.
- Please analyse the findings yourself by:
- uploading non-confidential samples to Virustotal.com
- Search the web for the filename
- Search the web for keywords from the rule name (e.g. EQUATIONGroupMalware_1 > search for "Equation Group")
- Search the web for the MD5 hash of the sample
- Please report back false positives via the "Issues" section, which is accessible via the right sidebar (mention the false positive indicator like a hash and/or filename and the rule name that triggered)
Loki currently includes the following IOCs:
- Equation Group Malware (Hashes, Yara Rules by Kaspersky and 10 custom rules generated by us)
- Carbanak APT - Kaspersky Report (Hashes, Filename IOCs - no service detection and Yara rules)
- Arid Viper APT - Trendmicro (Hashes)
- Anthem APT Deep Panda Signatures (not officialy confirmed) (krebsonsecurity.com - see Blog Post)
- Regin Malware (GCHQ / NSA / FiveEyes) (incl. Legspin and Hopscotch)
- Five Eyes QUERTY Malware (Regin Keylogger Module - see: Kaspesky Report)
- Skeleton Key Malware (other state-sponsored Malware) - Source: Dell SecureWorks Counter Threat Unit(TM)
- WoolenGoldfish - (SHA1 hashes, Yara rules) Trendmicro Report
- OpCleaver (Iranian APT campaign) - Source: Cylance
- More than 180 hack tool Yara rules - Source: APT Scanner THOR
- More than 600 web shell Yara rules - Source: APT Scanner THOR
- Numerous suspicious file name regex signatures - Source: APT Scanner THOR
- Much more ... (cannot update the list as fast as I include new signatures)
No requirements if you use the compiled EXE.
If you want to build it yourself:
- yara : It's recommended to use the most recent version of the compiled packages for Windows (x86) - Download it from here: http://goo.gl/PQjmsf
- scandir : faster alternative to os.walk()
- colorama : to color it up
- psutil : process checks
usage: loki.exe [-h] [-p path] [-s kilobyte] [--printAll] [--noprocscan] [--nofilescan] [--noindicator] [--debug] Loki - Simple IOC Scanner optional arguments: -h, --help show this help message and exit -p path Path to scan -s kilobyte Maximum file site to check in KB (default 2000 KB) --printAll Print all files that are scanned --noprocscan Skip the process scan --nofilescan Skip the file scan --noindicator Do not show a progress indicator --debug Debug output
Regin False Positives
Hash based IOCs
File Name based IOCs
Generated log file
LOKI scanner on our company homepage http://www.bsk-consulting.de/loki-free-ioc-scanner/
If you are interested in a corporate solution for APT scanning, check out Loki's big brother THOR.
Antivirus - False Positives
The compiled scanner may be detected by antivirus engines. This is caused by the fact that the scanner is a compiled python script that implement some file system and process scanning features that are also used in compiled malware code.
If you don't trust the compiled executable, please compile it yourself.
Compile the Scanner
Download PyInstaller, switch to the pyinstaller program directory and execute:
python ./pyinstaller.py -F C:\path\to\loki.py
This will create a
loki.exe in the subfolder
Pro Tip (optional)
To include the msvcr100.dll to improve the target os compatibility change the line in the file
./loki/loki.spec that contains
a.bianries, to the following:
a.binaries + [('msvcr100.dll', 'C:\Windows\System32\msvcr100.dll', 'BINARY')],
Loki - Simple IOC Scanner Copyright (c) 2015 Florian Roth
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/