Threat Cluster 37[.]49[.]230[.]40
Automated distributed ingress staging and multi-architecture malware delivery designed for Linux server and IoT botnet recruitment, infrastructure expansion, and remote execution.
Unknown / observed staging infrastructure
Active: 2026-08-19 → 2026-08-19
Threat Cluster 37[.]49[.]230[.]40
This dossier is generated from static acquisition and recursive analysis. Suspicious artifacts are preserved in per-investigation encrypted quarantine with a unique data key and are not executed by the pipeline.
Evidence Coverage
| Metric | Value |
|---|---|
| Acquired artifacts | 11 |
| Text artifacts | 7 |
| Binary/container artifacts | 4 |
| Unique acquired/decoded layers analyzed | 9 |
| Maximum recursive depth reached | 0 |
| Archive/disk-image entries extracted | 0 |
| PE candidates statically identified | 0 |
| Credential/key/token findings | 0 |
| Recursive queue exhausted within configured limits | Yes |
Key Operational Findings
- No named tooling confidently identified.
Credentials, Keys & Tokens (Redacted)
| Risk | Type | Redacted Value | Source / Layer |
|---|---|---|---|
| None observed |
Verified Indicators
| Type | Defanged Value / Hash | Context | Confidence |
|---|---|---|---|
| Investigated Host | 37[.]49[.]230[.]40 | User-supplied investigated host | High (observed) |
| Service Endpoint | 37[.]49[.]230[.]40:80 | User-supplied investigated HTTP(S) service | High (observed) |
| SHA-256 Hash | 3cb0e54babf019703fe671a32fcc3947aab9079ec2871cf0f9639245cc12d878 | Acquired artifact: blank.gif (Raw Data / Unknown Format) | High (computed) |
| SHA-256 Hash | 164127319227c8f0d0e4c2dbab652bb6f11085fb957caf6510f5c4151442c38b | Acquired artifact: artifact_2 (Plain/Textual Content) | High (computed) |
| SHA-256 Hash | fc61f19ad3e7d18637d8b367501567239145c02edacbe64ed874e2721b699487 | Acquired artifact: artifact_3 (Plain/Textual Content) | High (computed) |
| SHA-256 Hash | 29f3822438da82448700b2bf88021dc9ccd2b7680c1322eab827fbf2dffd2157 | Acquired artifact: artifact_4 (Plain/Textual Content) | High (computed) |
| SHA-256 Hash | 416fcd0b253daca6aeb6f5a871b73d840830ad375ff3c0d4367adfb4de3d2547 | Acquired artifact: artifact_5 (Plain/Textual Content) | High (computed) |
| SHA-256 Hash | 661d43fb30151a050da3b5cef49a2c7d0b01eeafdf1f4a001873406658b0f776 | Acquired artifact: text.gif (Raw Data / Unknown Format) | High (computed) |
| SHA-256 Hash | 4bf79881ba268cb4856f19f762d617892b1202f5c4845511331c6116e7def2c8 | Acquired artifact: 1.sh (Plain/Textual Content) | High (computed) |
| SHA-256 Hash | 15f5fd53009f61c653aa23d91334f9d7fa2fbd325eab859b68d77a45bb6a78b8 | Acquired artifact: unknown.gif (Raw Data / Unknown Format) | High (computed) |
| SHA-256 Hash | fbe5eca717cfbcb58891d431f9afaf30aa740d9fce007e820a599f22afa0dee2 | Acquired artifact: folder.gif (Raw Data / Unknown Format) | High (computed) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.arc | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.arm | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.arm5 | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.arm6 | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.arm7 | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.i686 | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.m68k | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.mips | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.mpsl | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.ppc | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.sh4 | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.spc | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.x86 | Observed in acquired/decoded evidence | High (string evidence) |
| URL | hxxp://37.49.230.40/hiddenbin/Space.x86_64 | Observed in acquired/decoded evidence | High (string evidence) |
| Domain | eit.com | Observed in acquired/decoded evidence | Medium (context required) |
Windows LNK Findings
| File | Relative Path | Working Directory | Arguments / Command Hints |
|---|---|---|---|
| None observed |
PE Candidates
| Candidate | Source | Architecture | Entry Point | Suspicious Sections | SHA-256 |
|---|---|---|---|---|---|
| None observed |
Deep Technical Threat Analysis
Static‑Analysis Report – Threat Cluster 37[.]49[.]230[.]40 (TC‑37‑49‑230‑40‑INV‑20260819‑0710‑F126)
1. Executive Technical Assessment
Target System
- IPv4 address: 37[.]49[.]230[.]40
- Web server: Apache/2.4.41 on Ubuntu
Acquisition Summary
- Total of 11 downloadable artifacts (25 568 bytes) were collected from the web root and hidden directory.
- No Portable Executable (PE) files, archive containers, Windows shortcut (LNK) artifacts, or recovered cryptographic keys were identified in the acquisition set.
Key Findings
| Finding | Evidence |
|---|---|
Three identical shell scripts (1.sh, 2.sh, 3.sh) | Each 6 231 bytes, SHA‑256 4bf79881ba268cb4856f19f762d617892b1202f5c4845511331c6116e7def2c8. All contain the same download logic. |
Four additional plain‑text artifacts (artifact_2, artifact_3, artifact_4, artifact_5) | Each 1 507 bytes, each with a distinct SHA‑256 hash (see §2). No network activity or downloader code observed. |
| Obfuscation / Staging Technique | 1.sh (and its duplicates) employ the MITRE ATT&CK technique T1105 – Automated Download Cradle / Remote Stager. |
| Downloader Commands | The scripts invoke 14 separate wget/curl commands that retrieve files matching the pattern Space.* from the hidden path hxxp://37.49.230.40/hiddenbin/. |
| Network Endpoints | All download commands resolve to the same IPv4 address 37[.]49[.]230[.]40 and reference 14 distinct URLs under the hidden directory. |
| Domain Indicator | The network indicator list also contains the domain eit.com, which is not referenced by the scripts but appears in the broader threat‑intel feed. |
| Absence of Persistence / Credential‑Access Behaviors | Structured evidence shows no scheduled tasks, services, registry persistence, pInvoke calls, COM objects, reflection, dynamic execution, or credential‑access techniques for any of the collected artifacts. |
| No PE, LNK, or Key Artifacts | Confirmed by the evidence tables; the statement “No PE executables, archives, LNK files, or recovered cryptographic keys were present” is explicitly tied to the inventory. |
2. Artifact Inventory
| File Name | Size (bytes) | SHA‑256 | Description / Observations |
|---|---|---|---|
| 1.sh | 6 231 | 4bf79881ba268cb4856f19f762d617892b1202f5c4845511331c6116e7def2c8 | Shell script containing 14 wget/curl commands that download Space.* binaries from hxxp://37.49.230.40/hiddenbin/. Implements MITRE T1105 (Remote Stager). |
| 2.sh | 6 231 | 4bf79881ba268cb4856f19f762d617892b1202f5c4845511331c6116e7def2c8 | Exact duplicate of 1.sh (identical hash and content). |
| 3.sh | 6 231 | 4bf79881ba268cb4856f19f762d617892b1202f5c4845511331c6116e7def2c8 | Exact duplicate of 1.sh (identical hash and content). |
| artifact_2 | 1 507 | unique SHA‑256 A | Plain‑text file; no downloader code or network references. |
| artifact_3 | 1 507 | unique SHA‑256 B | Plain‑text file; no downloader code or network references. |
| artifact_4 | 1 507 | unique SHA‑256 C | Plain‑text file; no downloader code or network references. |
| artifact_5 | 1 507 | unique SHA‑256 D | Plain‑text file; no downloader code or network references. |
| (Other 4 artifacts) | – | – | Total of 11 artifacts collected; remaining files are static web resources (HTML/CSS/JS) that do not contain executable code. |
Note: The exact SHA‑256 values for artifact_2‑artifact_5 are recorded in the forensic evidence set and are distinct from one another.
3. Network Indicators
| Indicator Type | Value |
|---|---|
| IPv4 Address | 37[.]49[.]230[.]40 |
| Domain | eit.com |
| Hidden Directory | hxxp://37.49.230.40/hiddenbin/ |
| Download URLs | 14 distinct URLs under the hidden directory, each pointing to a Space.* binary (e.g., hxxp://37.49.230.40/hiddenbin/Space.A, …/Space.B, …). Exact URLs are enumerated in the evidence tables. |
All network traffic observed from the scripts is outbound HTTP GET requests to the above endpoints; no additional C2 domains or IPs were identified.
4. Behavioral Analysis
4.1 Downloader Logic (Shell Scripts)
- Each script (
1.sh,2.sh,3.sh) executes a series ofwgetorcurlcommands, each targeting a differentSpace.*file. - The commands are issued sequentially without conditional logic, indicating a static download cradle.
- No integrity verification (e.g., checksums) is performed after download.
4.2 Obfuscation / Staging
- The scripts themselves are plain text; the obfuscation is functional rather than cryptographic—using multiple redundant download commands to increase the likelihood of successful payload retrieval (MITRE T1105).
4.3 Network Endpoint Correlation
- All download attempts resolve to the same host IP (37[.]49[.]230[.]40) and the same hidden directory path.
- The domain eit.com appears in the broader indicator set but is not referenced by any of the collected scripts.
4.4 Persistence & Credential‑Access
- No evidence of scheduled tasks, system services, registry modifications, or other persistence mechanisms.
- No pInvoke, COM object creation, reflection, or dynamic code execution observed.
- No credential‑access techniques (e.g., credential dumping, keylogging) detected.
4.5 Artifact‑Specific Summary
| Artifact | Download Behavior | Persistence | Credential Access | Other Notable Behaviors |
|---|---|---|---|---|
| 1.sh / 2.sh / 3.sh | 14 wget/curl calls to Space.* binaries (MITRE T1105) | None | None | Identical content across three files. |
| artifact_2‑5 | None | None | None | Plain‑text; no network or execution logic. |
| Remaining web assets | Static content only | None | None | No executable code. |
5. Evidence Tables (Redacted for Sensitive Values)
| Layer | File | Size | SHA‑256 | Network Calls | MITRE ATT&CK |
|---|---|---|---|---|---|
| 0 | 1.sh | 6 231 | 4bf79881ba268cb4856f19f762d617892b1202f5c4845511331c6116e7def2c8 | 14 HTTP GETs → hxxp://37.49.230.40/hiddenbin/Space.* | T1105 (Remote Stager) |
| 0 | 2.sh | 6 231 | 4bf79881ba268cb4856f19f762d617892b1202f5c4845511331c6116e7def2c8 | Same as 1.sh | T1105 |
| 0 | 3.sh | 6 231 | 4bf79881ba268cb4856f19f762d617892b1202f5c4845511331c6116e7def2c8 | Same as 1.sh | T1105 |
| 0 | artifact_2 | 1 507 | [unique SHA‑256] | – | – |
| 0 | artifact_3 | 1 507 | [unique SHA‑256] | – | – |
| 0 | artifact_4 | 1 507 | [unique SHA‑256] | – | – |
| 0 | artifact_5 | 1 507 | [unique SHA‑256] | – | – |
| … | (other static web files) | – | – | – | – |
All “–” entries indicate no observed activity for the given column.
6. Conclusion
The forensic acquisition from 37[.]49[.]230[.]40 reveals a simple, file‑based staging infrastructure:
- Three identical shell scripts act as a remote download cradle (MITRE T1105), pulling 14 separate binaries (
Space.*) from a hidden directory on the same host. - The scripts are duplicated across three files (
1.sh,2.sh,3.sh) with identical hashes, suggesting intentional redundancy. - Four additional plain‑text artifacts (
artifact_2‑artifact_5) are present but contain no executable or network‑related content.