PHPsert can use multiple obfuscation techniques including XOR encoding, hexadecimal character representation, string concatenation, and randomized variable names.2
tool
PHPsert S9028
- Type
- malware
- Platform
- Network Devices
- Created
- 19 April 2026
- Last modified
- 12 May 2026
PHPsert is a webshell used to execute PHP code that has been in use since at least 2023 against targets in Japan, Singapore, Peru, Taiwan, Iran, Republic of Korea, and the Philippines. PHPsert is not typically deployed as a standalone but integrated into web content such as text editors and content management systems.[1]
6
Techniques29th pct
3
TacticsBottom 21%
0
Threat groupsNone recorded
1
Campaignunranked
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S9028
Standing S9028
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
Techniques629th pct
29th percentile · 71% 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 groups061% 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.
Campaign185% 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 / technique37medTop 15%
85th percentile · 85% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique3med
Detection coverage S9028
262 distinct rules cover the 6 techniques recorded for this tool. The 265 technique-to-rule mappings resolve to 262 distinct rules, because one rule can cover several techniques. 186 Sigma · 76 Splunk.
6 covered by at least one rule262 distinct rules in total
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