BUSHWALK can encrypt the resulting data generated from C2 commands with RC4.3
tool
BUSHWALK S1118
- Type
- malware
- Platform
- Network Devices
- Created
- 7 March 2024
- Last modified
- 15 April 2025
BUSHWALK is a web shell written in Perl that was inserted into the legitimate querymanifest.cgi file on compromised Ivanti Connect Secure VPNs during Cutting Edge.[1][2]
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 S1118
BUSHWALK can write malicious payloads sent through a web request’s command parameter.45
BUSHWALK can Base64 decode and RC4 decrypt malicious payloads sent through a web request’s command parameter.67
BUSHWALK can modify the DSUserAgentCap.pm Perl module on Ivanti Connect Secure VPNs and either activate or deactivate depending on the value of the user agent in incoming HTTP requests.8
BUSHWALK is a web shell that has the ability to execute arbitrary commands or write files.9
BUSHWALK can embed into the legitimate querymanifest.cgi file on compromised Ivanti Connect Secure VPNs.1011
Standing S1118
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 / technique6med
Detection coverage S1118
319 distinct rules cover the 6 techniques recorded for this tool. The 329 technique-to-rule mappings resolve to 319 distinct rules, because one rule can cover several techniques. 244 Sigma · 75 Splunk.
5 covered by at least one rule1 with no coverage319 distinct rules in total
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