Maritime and research targets, Saudi Arabia included.
Also tracked as TEMP.Periscope · TEMP.Jumper · Leviathan · BRONZE MOHAWK · GADOLINIUM · KRYPTONITE PANDA · G0065 · ATK29 · TA423 · Red Ladon · ITG09 · MUDCARP
Summary
APT40 is a threat actor attributed to China, assessed as espionage-motivated. Its recorded targeting runs to government, private sector across 13 countries in the open reporting we hold — Saudi Arabia among them.
Across 50 attributed ATT&CK techniques we resolve 14 distinct behaviours — the things they do that a detection can be written against. The two that account for most of their observed tradecraft are valid account abuse or account creation and persistence pointing into world-writable staging. Their toolkit is 17 named items: 6 we see only in this actor's reporting and 11 commodity or dual-use. That ratio is the point — the first group is what identifies them, the second is what they share with every other group and with red teams.
For a Gulf defender the relevant line is the victimology: Saudi Arabia appear in the reporting behind this record. That is evidence of past targeting, not a forecast, and it is drawn from what vendors chose to publish — an actor working quietly in a market nobody reports on looks identical to one that is absent.
As MITRE describes them: “Leviathan is an espionage actor targeting organizations and high-value targets in defense and government. Active since at least 2014, this actor has long-standing interest in maritime industries, naval defense contractors, and associated research institutions in the United States and Western Europe.” — MITRE ATT&CK, CC BY 4.0.
On the name. “APT40” labels a cluster of related activity tracked under one name — not a verified organisation. Whether one team, several contractors or a rotating cast sits behind it is not something this record establishes, and the vendor names below are separate groupings that only mostly overlap.
02 — The detection plan
Most actor profiles hand you indicators that expire in days. These are the behaviours the actor cannot drop without changing how they operate, each with the reason it holds. Weight is our own: how much of the actor's observed tradecraft the behaviour accounts for.
The persistence mechanism and the directory it points at both outlive the payload. The discriminator is the TARGET PATH, not the task or key name, which the actor can change freely.
8 techniques · weight 5
Few legitimate processes read LSASS memory, so precision is high in most estates once the agents that do are excluded.
2 techniques · weight 5
A script file appearing under a web root outside a deployment window is close to a binary signal, and it catches the entry vector rather than the aftermath.
2 techniques · weight 5
The delivery wrapper changes constantly; an office, archive or browser process parenting a shell is the same shape across all of them.
8 techniques · weight 5
Defeats egress-domain control outright — the destination is a platform the estate already permits, so no blocklist and no TLD heuristic will see it.
7 techniques · weight 4
The command-line SHAPE — the flag combination, not the payload — is stable for months to years and cheap to match.
8 techniques · weight 4
Chosen to avoid a shell, so command-line rules miss it entirely. The broker is a stable choice; what it runs is not.
6 techniques · weight 4
The set of system binaries that can fetch a file is small and changes with the OS, not with the actor.
5 techniques · weight 3
Lateral movement leaves a service-creation or admin-share write that is the same regardless of the tool that made it.
6 techniques · weight 3
Staging is a step the actor cannot skip, and it happens before the data leaves — the last cheap place to catch it.
7 techniques · weight 3
Not a durable behavioural signature but the entry vector for a large public estate — worth an exposure control even where the detection is weak.
3 techniques · weight 3
The tunneller is a tool choice that persists for months, and the traffic shape is visible even when the payload is not.
8 techniques · weight 3
Produces no malware event at all — the only trace is in identity telemetry, which is why an endpoint-only programme has a blind spot exactly here.
10 techniques · weight 3
The URI shape and cadence are cheap to match and hold for weeks to months — but the destination itself rotates in days, so match the pattern rather than the host.
7 techniques · weight 3
No single behaviour here is worth waking someone. Summed weights of 6 on one host inside a window is an alert; 10 is an incident. The pair that most reliably means this actor rather than commodity crime is Persistence pointing into world-writable staging + Credential access against LSASS — seen together, treat as an incident regardless of total.
03 — Tooling
Purpose is derived, not asserted: each tool's own ATT&CK techniques are resolved to tactics, and the tactics it spends most of its techniques in are what it is for.
Actor-specific means we have no record of it outside this actor's reporting — those are the names that identify them. Commodity covers everything sold, published or shared: Cobalt Strike and Brute Ratel are licensed red-team software every pentester owns, Mimikatz and Impacket are public, and backdoors like ShadowPad circulate between unrelated groups. Finding a commodity tool tells you far less, which is exactly why the split is drawn. ATT&CK's own “malware vs tool” type answers a different question — whether the software is malicious — so it is not used for this.
Actor-specific — 6 items
Network reconnaissance and evading defences.
Staying resident and network reconnaissance.
Gathering data and first access.
Network reconnaissance and running code.
Remote control and network reconnaissance.
Credential theft and running code.
Commodity and dual-use — 11 items
Credential theft and gathering data.
Moving between hosts and gathering data.
Credential theft and gathering data.
Gathering data and staying resident.
Gathering data and network reconnaissance.
Staying resident and moving between hosts.
Gathering data and credential theft.
Moving data out and moving between hosts.
We hold none. Our corpus carries 9,780 hashes, but they come from live feeds covering current commodity campaigns — not the decade-old actor-specific backdoors in the list above. ATT&CK itself publishes no sample hashes; it is a technique knowledge base. Where a sample would have to come from a third party’s family tag rather than from this actor’s reporting, we leave the row empty instead of implying an attribution we cannot support.
File hashes — commodity families — 18 held
⚠ These are samples of tools this actor is reported to use, not samples tied to this actor. Cobalt Strike and China Chopper are used by hundreds of groups and by red teams; a match here is evidence about the tool, not about APT40. Published because a hunt starting point is still worth having, labelled so it cannot be mistaken for attribution.
| Hash | Type | Family | First seen |
|---|---|---|---|
| 1c948822cb57763c1d343542ee4ade212d8f4fbb | sha1 | China Chopper | 2026-07-07 |
| 89cb9c926e136c54011f3e0792b4a28c | md5 | China Chopper | 2026-07-07 |
| 6f336f372c5a642b57413363265e7d7e | md5 | China Chopper | 2026-07-07 |
| f3570bb6e0f9c695d48f89f043380b43831dd0f6fe79b16eda2a3ffd9fd7ad16 | sha256 | China Chopper | 2026-07-07 |
| 9f33095a24471bed55ce11803e4ebbed5118bfb5d3861baf1c8214efcd9e7de6 | sha256 | China Chopper | 2026-07-07 |
| 35e0b22139fb27d2c9721aedf5770d893423bf029e1f56be92485ff8fce210f3 | sha256 | China Chopper | 2026-07-07 |
| fe11b199ada23d5ac25efc4215e67f4ff617ccb4d429eb64412072687367ca1c | sha256 | Cobalt Strike | 2026-06-22 |
| ed7087e3afba4b320bdf04f32d3a6c567effd3d18a97682968e567000e70b335 | sha256 | Cobalt Strike | 2026-06-22 |
| eb14d9e35a3bf0a933297f861bee0be9e6b9061fe4573a81ac92b71d55b6474f | sha256 | Cobalt Strike | 2026-06-22 |
| e7aff6a55a7866776272d9913dfbf9d7db33fc9de6aced22f2a195feebb0e85f | sha256 | Cobalt Strike | 2026-06-22 |
| cd99e83d241cfbb41bfcd0bc622a87d16268e710ca7d736d0c5f44774e0056e2 | sha256 | Cobalt Strike | 2026-06-22 |
| c937eca7c4c9b98df9257d986e666d25411aac5fa39d21f7018dd2e1663f0c76 | sha256 | Cobalt Strike | 2026-06-22 |
04 — Coverage, honestly counted
Of the techniques attributed to APT40, 37 fold into the detection plan above, 10 describe preparation you cannot see from inside your network, and 3 are uncatalogued — we have not yet placed them. That last number is published on purpose; it is the honest size of the gap.
05 — The chain
The same techniques as above, sequenced. Useful for deciding where to spend a detection: the earlier a tactic sits, the more of the intrusion you still get to prevent.
06 — Tradecraft artefacts
Pulled from primary vendor research and kept attributed. These are hunt starting points, not detections — a path an actor used once is worth a query, not a rule.
| Artefact | Kind | First reported by | Date |
|---|---|---|---|
| %programdata%\Microsoft\DeviceSync\ | file path | Google TAG | 2023-10-18 |
| %temp%\{random_directory}\poc.png_ | file path | Google TAG | 2023-10-18 |
07 — Sourcing, graded
NATO Admiralty grading. The letter is the source's reliability, the number the credibility of the claim. We separate primary vendor research from outlets reporting on it, because ten articles derived from one report is one report.
| Grade | Source | Basis |
|---|---|---|
| B2 | MITRE actor record | 44 references across 31 distinct research hosts |
| B2 | Recorded Future | 2 items — primary vendor research |
| C3 | Google TAG | 1 item — reporting on other vendors' research |
| — | Estate telemetry | no data — absent, not negative |
3 items · 2 outlets · 67% of reporting traces to a single outlet
08 — What we do not know
Every vendor profile has these. Most omit them, which leaves you unable to tell a quiet actor from an unobserved one.
No URI paths, headers or beacon sequences for any family we hold, and no URL indicators at all to derive them from — the indicator set is hashes, hosts and addresses.
No domains are attributed to this actor in our holdings, so no naming convention, TLD preference or hosting pattern can be derived.
09 — Outlook
Probability language is ICD 203. Likelihood and confidence are stated separately: how likely we think it is, and how good our basis is for thinking so.
11 — Related actors
Ranked by shared victimology first, shared attribution second. The reason is on each card.
Saudi aviation and petrochemical, with a wiper in the toolkit.
Credential phishing at scale against Gulf government and academic mail.
Travel, telecom and personal-movement data across Kuwait and Saudi Arabia.
10 — Primary sources
44 of them. Published in full so the page can be checked rather than believed.
Run it against your own estate
The library is the part we can publish. The platform runs the same detection plan against your own estate, tells you which of these behaviours you already cover, and retro-hunts the rest — on your hardware, with nothing leaving the building.