tool
RCSession S0662
- Type
- malware
- Platform
- Windows
- Created
- 19 November 2021
- Last modified
- 11 April 2024
RCSession is a backdoor written in C++ that has been in use since at least 2018 by Mustang Panda and by Threat Group-3390 (Type II Backdoor).[1][2][3]
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0662
RCSession can store its obfuscated configuration file in the Registry under HKLM\SOFTWARE\Plus or HKCU\SOFTWARE\Plus.67
RCSession can compress and obfuscate its strings to evade detection on a compromised host.8
RCSession can gather system owner information, including user and administrator privileges.9
RCSession has used a file named English.rtf to appear benign on victim hosts.1011
RCSession can launch itself from a hollowed svchost.exe process.121314
Standing S0662
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
84th percentile · 84% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
89th percentile · 89% of 825 ATT&CK software entries have this many tactics spanned or fewer.
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
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
64th percentile · 64% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Detection coverage S0662
910 distinct rules cover the 22 techniques recorded for this tool. The 944 technique-to-rule mappings resolve to 910 distinct rules, because one rule can cover several techniques. 633 Sigma · 277 Splunk.
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