An allowlisted, vendor-signed binary tells you nothing about who is driving it. The file on disk is identical whether the session belongs to your support vendor or to someone holding that vendor's password, which is the reason this class of abuse gets past traditional antivirus [2].
Once software identity is out of the equation, the remaining signal is countable. Across the two lists in sheersafe's dev.to post there are eight signals, and exactly one turns on recognising the software at all: an unfamiliar RMM binary appearing where only your one approved tool should be [11]. That check works as an inventory diff, comparing what's running against what's approved, rather than matching a malware signature. The other seven describe where a session came from, when it ran, which class of machine it landed on, and what it did once connected [5][8].
The reframing has a bill attached. The post does not itemise it. At least four of the eight rules are deviation rules. They need an approved-tool inventory, documented support hours plus an approved vendor list, a known-good set of source IP ranges and geographies, and the domains and addresses that belong to your RMM vendor's own infrastructure [13]. None of those four lists ships with the product. Adopt the alert list without writing them and you have alerts that cannot evaluate their own condition.
The privilege side is cheaper to reason about. Many RMM deployments hold high privileges on every endpoint they touch, continuously, because that is what unattended support needs [4]. Given that standing grant, the console credential is the fleet. Keeping the RMM admin account separate from the account that reads email is the highest-leverage line in the post [7]. A technician clearing a print queue does not need domain admin for the length of the session, and the role that grants it anyway is what turns a phished password into a network incident instead of a support ticket [7][16].
On cadence: quarterly rather than annual means four reviews a year instead of one, and a worst case of three months between the day a contractor's access should have gone and the day anyone looks [12]. Contractors and lapsed vendor relationships do not schedule themselves around the fiscal year [15].
What the material does not carry is incident data. The post asserts RMM tools are a top attacker entry point and names ScreenConnect as its example, but supplies no counts, dated intrusions, or telemetry to back it [14]. It also names no configuration setting; enrollment approval arrives hedged as something to turn on "if your platform supports it" [7]. So the transferable part is the reasoning rather than the checklist. If your platform lacks per-role session scoping or enrollment gating, two of the four hardening steps are simply unavailable, and this evidence does not say which platforms have them.
The decision rule is the part worth keeping. If you cannot answer who installed an RMM agent and why within a few minutes, treat the install as suspicious until proven otherwise [6]. That test is more informative run against a legitimate install: when it fails there, the alert list will generate work nobody can triage [9].
