tool
Bisonal S0268
- Type
- malware
- Platform
- Windows
- Created
- 17 October 2018
- Last modified
- 11 April 2024
Bisonal is a remote access tool (RAT) that has been used by Tonto Team against public and private sector organizations in Russia, South Korea, and Japan since at least December 2010.[1][2]
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0268
Bisonal has used the RegQueryValueExA function to retrieve proxy information in the Registry.4
Bisonal has appended random binary data to the end of itself to generate a large binary.8
Bisonal has used the MPRESS packer and similar tools for obfuscation.9
Bisonal's DLL file and non-malicious decoy file are encrypted with RC4 and some function name strings are obfuscated.1011
Standing S0268
Reach is how much of ATT&CK this tool touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 825 ATT&CK software entries only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.
Reach
95th percentile · 95% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
94th percentile · 94% of 825 ATT&CK software entries have this many tactics spanned or fewer.
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
64th percentile · 64% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Detection coverage S0268
1071 distinct rules cover the 34 techniques recorded for this tool. The 1151 technique-to-rule mappings resolve to 1071 distinct rules, because one rule can cover several techniques. 706 Sigma · 365 Splunk.
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