Embargo has obtained active services running on the victim’s system through the functions OpenSCManagerW() and EnumServicesStatusExW().7
tool
Embargo S1247
- Type
- malware
- Platforms
- ESXi, Linux, Windows
- Created
- 19 October 2025
- Last modified
- 20 October 2025
Embargo is a ransomware variant written in Rust that has been active since at least May 2024.[1][2] Embargo ransomware operations are associated with “double extortion” ransomware activity, where data is exfiltrated from victim environments prior to encryption, with threats to publish files if a ransom is not paid.[1][2] Embargo ransomware has been known to be delivered through a loader known as MDeployer which also leverages a malware component known as MS4Killer that facilitates termination of processes operating on the victim hosts.[2] Embargo is also reportedly a Ransomware as a Service (RaaS).[2]
22
TechniquesTop 16%
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 S1247
Embargo has encrypted both MDeployer and MS4 Killer payloads with RC4.8
Embargo has obtained persistence of the loader MDeployer by creating a scheduled task named “Perf_sys.”9
Embargo has utilized MS4Killer to detect running processes on the victim device.10 Embargo has also captured a snapshot of active running processes using the Windows API CreateToolHelp32Snapshot().11
Embargo has utilized a BAT script to disable security solutions.12
Embargo has leveraged MS4Killer to deliver a vulnerable driver to the victim device, sometimes referred to as Bring Your Own Vulnerable Driver (BYOVD).13 Embargo has utilized the vulnerable driver probmon.sys version 3.0.0.4 which had a revoked certificated from “ITM System Co.,LTD.”13
Standing S1247
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
Techniques22Top 16%
84th percentile · 84% 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 / technique28med71st pct
71st percentile · 71% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique8med
Detection coverage S1247
776 distinct rules cover the 22 techniques recorded for this tool. The 819 technique-to-rule mappings resolve to 776 distinct rules, because one rule can cover several techniques. 496 Sigma · 280 Splunk.
19 covered by at least one rule3 with no coverage776 distinct rules in total
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