FakeM C2 traffic attempts to evade detection by resembling data generated by legitimate messenger applications, such as MSN and Yahoo! messengers. Additionally, some variants of FakeM use modified SSL code for communications back to C2 servers, making SSL decryption ineffective.2
The original variant of FakeM encrypts C2 traffic using a custom encryption cipher that uses an XOR key of “YHCRA” and bit rotation between each XOR operation. Some variants of FakeM use RC4 to encrypt C2 traffic.5
Command and Controlno detection rules
Standing S0076
Reach is how much of ATT&CK this malware 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
Techniques4Bottom 17%
17th percentile · 83% 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 / technique3medBottom 3%
3rd percentile · 97% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique2.5med
FakeM detections S0076
10 distinct rules cover the 4 techniques recorded for this malware. 9 Sigma · 1 Splunk.
3 covered by at least one rule1 with no coverage10 distinct rules in total
Showing 1-10 of 10 rules
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Detects the creation of an "Active Directory Schema Cache File" (.sch) file by an uncommon tool.
Detects the usage of particular AttributeLDAPDisplayNames, which are known for data exchange via LDAP by the tool LDAPFragger and are additionally not commonly used in companies.