Masquerading: Недействительная подпись кода
Other sub-techniques of Masquerading (7)
Adversaries may attempt to mimic features of valid code signatures to increase the chance of deceiving a user, analyst, or tool. Code signing provides a level of authenticity on a binary from the developer and a guarantee that the binary has not been tampered with. Adversaries can copy the metadata and signature information from a signed program, then use it as a template for an unsigned program. Files with invalid code signatures will fail digital signature validation checks, but they may appear more legitimate to users and security tools may improperly handle these files.(Citation: Threatexpress MetaTwin 2017) Unlike Code Signing, this activity will not result in a valid signature.
Примеры процедур |
|
| Название | Описание |
|---|---|
| WindTail |
WindTail has been incompletely signed with revoked certificates.(Citation: objective-see windtail1 dec 2018) |
| BADNEWS |
BADNEWS is sometimes signed with an invalid Authenticode certificate in an apparent effort to make it look more legitimate.(Citation: TrendMicro Patchwork Dec 2017) |
| Regin |
Regin stage 1 modules for 64-bit systems have been found to be signed with fake certificates masquerading as originating from Microsoft Corporation and Broadcom Corporation.(Citation: Kaspersky Regin) |
| APT37 |
APT37 has signed its malware with an invalid digital certificates listed as “Tencent Technology (Shenzhen) Company Limited.”(Citation: Securelist ScarCruft Jun 2016) |
| Windshift |
Windshift has used revoked certificates to sign malware.(Citation: objective-see windtail1 dec 2018)(Citation: SANS Windshift August 2018) |
| NETWIRE |
The NETWIRE client has been signed by fake and invalid digital certificates.(Citation: McAfee Netwire Mar 2015) |
| PcShare |
PcShare has used an invalid certificate in attempt to appear legitimate.(Citation: Bitdefender FunnyDream Campaign November 2020) |
| Gelsemium |
Gelsemium has used unverified signatures on malicious DLLs.(Citation: ESET Gelsemium June 2021) |
Контрмеры |
|
| Контрмера | Описание |
|---|---|
| Code Signing |
Enforce binary and application integrity with digital signature verification to prevent untrusted code from executing. |
Обнаружение
Collect and analyze signing certificate metadata and check signature validity on software that executes within the environment, look for invalid signatures as well as unusual certificate characteristics and outliers.
Ссылки
- Vest, J. (2017, October 9). Borrowing Microsoft MetaData and Signatures to Hide Binary Payloads. Retrieved September 10, 2019.
- Wardle, Patrick. (2018, December 20). Middle East Cyber-Espionage analyzing WindShift's implant: OSX.WindTail (part 1). Retrieved October 3, 2019.
- Dupuy, T. and Faou, M. (2021, June). Gelsemium. Retrieved November 30, 2021.
- Raiu, C., and Ivanov, A. (2016, June 17). Operation Daybreak. Retrieved February 15, 2018.
- Kaspersky Lab's Global Research and Analysis Team. (2014, November 24). THE REGIN PLATFORM NATION-STATE OWNAGE OF GSM NETWORKS. Retrieved December 1, 2014.
- Karim, T. (2018, August). TRAILS OF WINDSHIFT. Retrieved June 25, 2020.
- Lunghi, D., et al. (2017, December). Untangling the Patchwork Cyberespionage Group. Retrieved July 10, 2018.
- McAfee. (2015, March 2). Netwire RAT Behind Recent Targeted Attacks. Retrieved February 15, 2018.
- Vrabie, V. (2020, November). Dissecting a Chinese APT Targeting South Eastern Asian Government Institutions. Retrieved September 19, 2022.
Связанные риски
Каталоги
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