SharpDisco has dropped a recent-files stealer plugin to C:\Users\Public\WinSrcNT\It11.exe.2
tool
SharpDisco S1089
- Type
- malware
- Platform
- Windows
- Created
- 26 September 2023
- Last modified
- 16 April 2025
SharpDisco is a dropper developed in C# that has been used by MoustachedBouncer since at least 2020 to load malicious plugins.[1]
11
Techniques51st pct
8
TacticsTop 20%
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 S1089
SharpDisco can load a plugin to exfiltrate stolen files to SMB shares also used in C2.3
SharpDisco can create scheduled tasks to execute reverse shells that read and write data to and from specified SMB shares.4
SharpDisco can use cmd.exe to execute plugins and to send command output to specified SMB shares.5
SharpDisco has the ability to transfer data between SMB shares.6
SharpDisco can identify recently opened files by using an LNK format parser to extract the original file path from LNK files found in either %USERPROFILE%\Recent (Windows XP) or %APPDATA%\Microsoft\Windows\Recent (newer Windows versions) .7
Standing S1089
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
Techniques1151st pct
51st percentile · 51% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics8Top 20%
80th percentile · 80% of 825 ATT&CK software entries have this many tactics spanned or fewer.
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 / technique16med38th pct
38th percentile · 62% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique4med
Detection coverage S1089
352 distinct rules cover the 11 techniques recorded for this tool. The 364 technique-to-rule mappings resolve to 352 distinct rules, because one rule can cover several techniques. 247 Sigma · 105 Splunk.
10 covered by at least one rule1 with no coverage352 distinct rules in total
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