Fooder has stored its embedded payload in encrypted form within the binary, using a hardcoded key modified at runtime to produce the AES decryption key.2
tool
Fooder S9033
- Type
- malware
- Platform
- Windows
- Created
- 20 April 2026
- Last modified
- 23 April 2026
Fooder is a custom 64-bit C/C++ loader used by MuddyWater that can decrypt and reflectively load embedded payloads such as a go-socks5 proxy utility, the open-source HackBrowserData infostealer, or the MuddyViper backdoor. Fooder has frequently masqueraded as an entertainment executable, such as the Snake game (e.g., Snake_Game.exe).[1]
7
Techniques33rd pct
3
TacticsBottom 21%
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 S9033
Fooder has frequently masqueraded as the Snake game, using strings such as “Welcome to snake Game” and mutexes such as “SNAKE_G.”3
Fooder has used the WinCrypt API for payload decryption, DuplicateTokenEx to duplicate the token of a specified process, and CreateProcessAsUserA for payload execution.4
Fooder has used the DuplicateTokenEx API to duplicate the token of a specified process, and CreateProcessAsUserA to execute its payload.5
Fooder has decrypted payloads using the WinCrypt API and the AES key.6
Standing S9033
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
Techniques733rd pct
33rd percentile · 67% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics3Bottom 21%
21st percentile · 79% 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 / technique15med34th pct
34th percentile · 66% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique5med
Detection coverage S9033
192 distinct rules cover the 7 techniques recorded for this tool. The 197 technique-to-rule mappings resolve to 192 distinct rules, because one rule can cover several techniques. 166 Sigma · 26 Splunk.
6 covered by at least one rule1 with no coverage192 distinct rules in total
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