S0415: BOOSTWRITE
BOOSTWRITE is a loader crafted to be launched via abuse of the DLL search order of applications used by FIN7.[1]
Security context for executives and security teams
S0415: BOOSTWRITE describes [BOOSTWRITE](https://attack.mitre.org/software/S0415) is a loader crafted to be launched via abuse of the DLL search order of applications used by [FIN7](https://attack.mitre.org/groups/G0046).(Citation: FireEye FIN7 Oct 2019)
Executive priority
S0415: BOOSTWRITE is an official MITRE ATT&CK software. Glexia treats it as defensive behavior context for prioritizing monitoring, control validation, and response planning without using the object by itself as an attribution claim.
Technical view
Security teams should validate S0415: BOOSTWRITE by reviewing the official ATT&CK relationships, mapped tactics (the mapped ATT&CK tactic context), supported platforms (Windows), and available local telemetry before making detection or mitigation decisions.
Likely telemetry
- Official ATT&CK relationships and object metadata
- Network, endpoint, and security-tool telemetry
Detection direction
- Validate whether S0415: BOOSTWRITE appears in your detection coverage and tabletop scenarios.
- Use the object to align executive risk language with SOC, incident response, and detection engineering work.
- Do not treat ATT&CK relationship context as attribution without corroborating evidence.
Mitigation priorities
- Map the object to existing controls and identify missing telemetry or response ownership.
- Prioritize mitigations that reduce exposure on the listed platforms and tactics.
- Review adjacent ATT&CK relationships before changing policy, detections, or reporting language.
Additional notes and limits
Baseline Glexia take generated from the official MITRE ATT&CK STIX object, source hash, tactics, platforms, and detection fields. It is safe to replace with a richer model-generated take for the same source hash later.
This baseline take is source-grounded and schema-validated, but it does not include environment-specific telemetry, incident evidence, or threat-intelligence corroboration.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
BOOSTWRITE
BOOSTWRITE is a loader crafted to be launched via abuse of the DLL search order of applications used by FIN7.[1]
How security teams should use this page
Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.
Techniques used
This mirrors the MITRE pattern of making group, software, campaign, and technique relationships scannable. Relationship notes come from mirrored ATT&CK relationship text when available.
| Domain | ID | Name | Relationship / procedure |
|---|---|---|---|
| Enterprise | T1140 | Deobfuscate/Decode Files or Information | BOOSTWRITE has used a a 32-byte long multi-XOR key to decode data inside its payload.[1] |
| Enterprise | T1027.013 | Encrypted/Encoded FileSub-technique | BOOSTWRITE has encoded its payloads using a ChaCha stream cipher with a 256-bit key and 64-bit Initialization vector (IV) to evade detection.[1] |
| Enterprise | T1553.002 | Code SigningSub-technique | BOOSTWRITE has been signed by a valid CA.[1] |
| Enterprise | T1129 | Shared Modules | BOOSTWRITE has used the DWriteCreateFactory() function to load additional modules.[1] |
| Enterprise | T1574.001 | DLLSub-technique | BOOSTWRITE has exploited the loading of the legitimate Dwrite.dll file by actually loading the gdi library, which then loads the gdiplus library and ultimately loads the local Dwrite dll.[1] |
Groups, software, and campaigns
G0046: FIN7
FIN7 is a financially-motivated threat group that has been active since 2013. FIN7 has targeted the retail, restaurant, hospitality, software, consulting, financial services, medical equipment, cloud services, media, food and beverage, transportation, pharmaceutical, and utilities industries in the United States. A portion of FIN7 was operated out of a front company called Combi Security and often used point-of-sale malware for targeting efforts. Since 2020, FIN7 shifted operations to big game hunting (BGH), including use of REvil ransomware and their own Ransomware-as-a-Service (RaaS), Darkside. FIN7 may be linked to the Carbanak Group, but multiple threat groups have been observed using Carbanak, leading these groups to be tracked separately.[1][2][3][4][5][6][7]
All related ATT&CK context
Object version and sync metadata
The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates.
Imported snapshots across ATT&CK releases(2)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 19.2 | 1.1 | Current bundle | e34c07d37413… | ||
| 19.1 | 1.1 | Older bundle | e34c07d37413… |
Mirrored ATT&CK source object
The raw object is retained through the mirrored ATT&CK source bundle and object hash. The raw endpoint returns the exact object from the mirrored bundle when available.
External references and citations
MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.
- [1]FireEye FIN7 Oct 2019
Carr, N, et all. (2019, October 10). Mahalo FIN7: Responding to the Criminal Operators’ New Tools and Techniques. Retrieved October 11, 2019.
Open source URL - [2]mitre-attackS0415Open source URL
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