Psylo exfiltrates data to its C2 server over the same protocol as C2 communications.2
tool
Psylo S0078
- Type
- malware
- Platform
- Windows
- Created
- 31 May 2017
- Last modified
- 25 April 2025
Psylo is a shellcode-based Trojan that has been used by Scarlet Mimic. It has similar characteristics as FakeM. [1]
5
TechniquesBottom 23%
4
Tactics32nd pct
1
Threat groupunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0078
Psylo has a command to conduct timestomping by setting a specified file’s timestamps to match those of a system file in the System32 directory.3
Psylo has commands to enumerate all storage devices and to find all files that start with a particular string.5
Psylo has a command to download a file to the system from its C2 server.6
Standing S0078
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
Techniques5Bottom 23%
23rd percentile · 77% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics432nd pct
32nd percentile · 68% of 825 ATT&CK software entries have more tactics spanned.
Threat group161% tie · 22 values
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
Campaigns085% tie · 8 values
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
Rules / technique29medTop 25%
75th percentile · 75% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique9med
Detection coverage S0078
233 distinct rules cover the 5 techniques recorded for this tool. The 238 technique-to-rule mappings resolve to 233 distinct rules, because one rule can cover several techniques. 165 Sigma · 68 Splunk.
5 covered by at least one rule233 distinct rules in total
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