PowerStallion uses a XOR cipher to encrypt command output written to its OneDrive C2 server.2
tool
PowerStallion S0393
- Type
- malware
- Platform
- Windows
- Created
- 21 June 2019
- Last modified
- 25 April 2025
PowerStallion is a lightweight PowerShell backdoor used by Turla, possibly as a recovery access tool to install other backdoors.[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 S0393
PowerStallion has been used to monitor process lists.3
PowerStallion uses PowerShell loops to iteratively check for available commands in its OneDrive C2 server.4
PowerStallion modifies the MAC times of its local log files to match that of the victim's desktop.ini file.5
PowerStallion uses Microsoft OneDrive as a C2 server via a network drive mapped with net use.6
Standing S0393
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 / technique10medBottom 15%
15th percentile · 85% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique10med
Detection coverage S0393
357 distinct rules cover the 5 techniques recorded for this tool. The 437 technique-to-rule mappings resolve to 357 distinct rules, because one rule can cover several techniques. 276 Sigma · 81 Splunk.
5 covered by at least one rule357 distinct rules in total
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