CSPY Downloader has been packed with UPX.2
tool
CSPY Downloader S0527
- Type
- tool
- Platform
- Windows
- Created
- 9 November 2020
- Last modified
- 16 April 2025
CSPY Downloader is a tool designed to evade analysis and download additional payloads used by Kimsuky.[1]
12
Techniques54th pct
7
Tactics68th 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 S0527
CSPY Downloader has attempted to appear as a legitimate Windows service with a fake description claiming it is used to support packed applications.3
CSPY Downloader can use the schtasks utility to bypass UAC.4
CSPY Downloader has the ability to remove values it writes to the Registry.5
CSPY Downloader has the ability to self delete.6
CSPY Downloader can use GET requests to download additional payloads from C2.7
Standing S0527
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
Techniques1254th pct
54th percentile · 54% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics768th pct
68th percentile · 68% 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 / technique43.5medTop 11%
89th percentile · 89% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique9.5med
Detection coverage S0527
633 distinct rules cover the 12 techniques recorded for this tool. The 649 technique-to-rule mappings resolve to 633 distinct rules, because one rule can cover several techniques. 408 Sigma · 225 Splunk.
12 covered by at least one rule633 distinct rules in total
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