Веб-служба
Sub-techniques (3)
Adversaries may use an existing, legitimate external Web service as a means for relaying data to/from a compromised system. Popular websites and social media acting as a mechanism for C2 may give a significant amount of cover due to the likelihood that hosts within a network are already communicating with them prior to a compromise. Using common services, such as those offered by Google or Twitter, makes it easier for adversaries to hide in expected noise. Web service providers commonly use SSL/TLS encryption, giving adversaries an added level of protection. Use of Web services may also protect back-end C2 infrastructure from discovery through malware binary analysis while also enabling operational resiliency (since this infrastructure may be dynamically changed).
Примеры процедур |
|
Название | Описание |
---|---|
Inception |
Inception has incorporated at least five different cloud service providers into their C2 infrastructure including CloudMe.(Citation: Kaspersky Cloud Atlas December 2014)(Citation: Symantec Inception Framework March 2018) |
Carbon |
Carbon can use Pastebin to receive C2 commands.(Citation: Accenture HyperStack October 2020) |
Rocke |
Rocke has used Pastebin, Gitee, and GitLab for Command and Control.(Citation: Anomali Rocke March 2019)(Citation: Talos Rocke August 2018) |
Chimera |
Chimera has used Google Cloud's appspot service to host C2 servers.(Citation: Cycraft Chimera April 2020) |
BoomBox |
BoomBox can download files from Dropbox using a hardcoded access token.(Citation: MSTIC Nobelium Toolset May 2021) |
SharpStage |
SharpStage has used a legitimate web service for evading detection.(Citation: Cybereason Molerats Dec 2020) |
During Operation Spalax, the threat actors used OneDrive and MediaFire to host payloads.(Citation: ESET Operation Spalax Jan 2021) |
|
FIN6 |
FIN6 has used Pastebin and Google Storage to host content for their operations.(Citation: FireEye FIN6 Apr 2019) |
SMOKEDHAM |
SMOKEDHAM has used Google Drive and Dropbox to host files downloaded by victims via malicious links.(Citation: FireEye Shining A Light on DARKSIDE May 2021) |
LazyScripter |
LazyScripter has used GitHub to host its payloads to operate spam campaigns.(Citation: MalwareBytes LazyScripter Feb 2021) |
DropBook |
DropBook can communicate with its operators by exploiting the Simplenote, DropBox, and the social media platform, Facebook, where it can create fake accounts to control the backdoor and receive instructions.(Citation: Cybereason Molerats Dec 2020)(Citation: BleepingComputer Molerats Dec 2020) |
Bumblebee |
Bumblebee has been downloaded to victim's machines from OneDrive.(Citation: Proofpoint Bumblebee April 2022) |
FIN8 |
FIN8 has used |
Hildegard |
Hildegard has downloaded scripts from GitHub.(Citation: Unit 42 Hildegard Malware) |
EXOTIC LILY |
EXOTIC LILY has used file-sharing services including WeTransfer, TransferNow, and OneDrive to deliver payloads.(Citation: Google EXOTIC LILY March 2022) |
Sibot |
Sibot has used a legitimate compromised website to download DLLs to the victim's machine.(Citation: MSTIC NOBELIUM Mar 2021) |
Ember Bear |
Ember Bear has used Discord's content delivery network (CDN) to deliver malware and malicious scripts to a compromised host.(Citation: Palo Alto Unit 42 OutSteel SaintBot February 2022 ) |
NETWIRE |
NETWIRE has used web services including Paste.ee to host payloads.(Citation: FireEye NETWIRE March 2019) |
CharmPower |
CharmPower can download additional modules from actor-controlled Amazon S3 buckets.(Citation: Check Point APT35 CharmPower January 2022) |
WhisperGate |
WhisperGate can download additional payloads hosted on a Discord channel.(Citation: Crowdstrike WhisperGate January 2022)(Citation: Unit 42 WhisperGate January 2022)(Citation: Microsoft WhisperGate January 2022)(Citation: Cisco Ukraine Wipers January 2022)(Citation: Medium S2W WhisperGate January 2022) |
Doki |
Doki has used the dogechain.info API to generate a C2 address.(Citation: Intezer Doki July 20) |
GuLoader |
GuLoader has the ability to download malware from Google Drive.(Citation: Medium Eli Salem GuLoader April 2021) |
Fox Kitten |
Fox Kitten has used Amazon Web Services to host C2.(Citation: ClearSky Pay2Kitten December 2020) |
Bazar |
Bazar downloads have been hosted on Google Docs.(Citation: Cybereason Bazar July 2020)(Citation: Zscaler Bazar September 2020) |
Turla |
Turla has used legitimate web services including Pastebin, Dropbox, and GitHub for C2 communications.(Citation: Accenture HyperStack October 2020)(Citation: ESET Crutch December 2020) |
Mustang Panda |
Mustang Panda has used DropBox URLs to deliver variants of PlugX.(Citation: Proofpoint TA416 Europe March 2022) |
Gamaredon Group |
Gamaredon Group has used GitHub repositories for downloaders which will be obtained by the group's .NET executable on the compromised system.(Citation: ESET Gamaredon June 2020) |
Ngrok |
Ngrok has been used by threat actors to proxy C2 connections to ngrok service subdomains.(Citation: Zdnet Ngrok September 2018) |
APT32 |
APT32 has used Dropbox, Amazon S3, and Google Drive to host malicious downloads.(Citation: Volexity Ocean Lotus November 2020) |
TeamTNT |
TeamTNT has leveraged iplogger.org to send collected data back to C2.(Citation: Aqua TeamTNT August 2020)(Citation: Cisco Talos Intelligence Group) |
Контрмеры |
|
Контрмера | Описание |
---|---|
Network Intrusion Prevention |
Use intrusion detection signatures to block traffic at network boundaries. |
Web Service Mitigation |
Firewalls and Web proxies can be used to enforce external network communication policy. It may be difficult for an organization to block particular services because so many of them are commonly used during the course of business. Network intrusion detection and prevention systems that use network signatures to identify traffic for specific adversary malware can be used to mitigate activity at the network level. Signatures are often for unique indicators within protocols and may be based on the specific protocol or encoded commands used by a particular adversary or tool, and will likely be different across various malware families and versions. Adversaries will likely change tool C2 signatures over time or construct protocols in such a way as to avoid detection by common defensive tools. (Citation: University of Birmingham C2) |
Restrict Web-Based Content |
Restrict use of certain websites, block downloads/attachments, block Javascript, restrict browser extensions, etc. |
Обнаружение
Host data that can relate unknown or suspicious process activity using a network connection is important to supplement any existing indicators of compromise based on malware command and control signatures and infrastructure or the presence of strong encryption. Packet capture analysis will require SSL/TLS inspection if data is encrypted. Analyze network data for uncommon data flows (e.g., a client sending significantly more data than it receives from a server). User behavior monitoring may help to detect abnormal patterns of activity.(Citation: University of Birmingham C2)
Ссылки
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- Faou, M. (2020, December 2). Turla Crutch: Keeping the “back door” open. Retrieved December 4, 2020.
- Accenture. (2020, October). Turla uses HyperStack, Carbon, and Kazuar to compromise government entity. Retrieved December 2, 2020.
- FireEye. (2021, May 11). Shining a Light on DARKSIDE Ransomware Operations. Retrieved September 22, 2021.
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- Falcone, R. et al.. (2022, January 20). Threat Brief: Ongoing Russia and Ukraine Cyber Conflict. Retrieved March 10, 2022.
- Crowdstrike. (2022, January 19). Technical Analysis of the WhisperGate Malicious Bootloader. Retrieved March 10, 2022.
- Biasini, N. et al.. (2022, January 21). Ukraine Campaign Delivers Defacement and Wipers, in Continued Escalation. Retrieved March 14, 2022.
- Adair, S. and Lancaster, T. (2020, November 6). OceanLotus: Extending Cyber Espionage Operations Through Fake Websites. Retrieved November 20, 2020.
- Maniath, S. and Kadam P. (2019, March 19). Dissecting a NETWIRE Phishing Campaign's Usage of Process Hollowing. Retrieved January 7, 2021.
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- M. Porolli. (2021, January 21). Operation Spalax: Targeted malware attacks in Colombia. Retrieved September 16, 2022.
- Ilascu, I. (2020, December 14). Hacking group’s new malware abuses Google and Facebook services. Retrieved December 28, 2020.
- Cybereason Nocturnus Team. (2020, December 9). MOLERATS IN THE CLOUD: New Malware Arsenal Abuses Cloud Platforms in Middle East Espionage Campaign. Retrieved December 22, 2020.
- Chen, J. et al. (2021, February 3). Hildegard: New TeamTNT Cryptojacking Malware Targeting Kubernetes. Retrieved April 5, 2021.
- Symantec. (2018, March 14). Inception Framework: Alive and Well, and Hiding Behind Proxies. Retrieved May 8, 2020.
- GReAT. (2014, December 10). Cloud Atlas: RedOctober APT is back in style. Retrieved May 8, 2020.
- Kol, Roi. Morag, A. (2020, August 25). Deep Analysis of TeamTNT Techniques Using Container Images to Attack. Retrieved September 22, 2021.
- Darin Smith. (2022, April 21). TeamTNT targeting AWS, Alibaba. Retrieved August 4, 2022.
- McKeague, B. et al. (2019, April 5). Pick-Six: Intercepting a FIN6 Intrusion, an Actor Recently Tied to Ryuk and LockerGoga Ransomware. Retrieved April 17, 2019.
- Merriman, K. and Trouerbach, P. (2022, April 28). This isn't Optimus Prime's Bumblebee but it's Still Transforming. Retrieved August 22, 2022.
- MSTIC. (2021, May 28). Breaking down NOBELIUM’s latest early-stage toolset. Retrieved August 4, 2021.
- Unit 42. (2022, February 25). Spear Phishing Attacks Target Organizations in Ukraine, Payloads Include the Document Stealer OutSteel and the Downloader SaintBot. Retrieved June 9, 2022.
- Jazi, H. (2021, February). LazyScripter: From Empire to double RAT. Retrieved November 24, 2021.
- Check Point. (2022, January 11). APT35 exploits Log4j vulnerability to distribute new modular PowerShell toolkit. Retrieved January 24, 2022.
- Martin Zugec. (2021, July 27). Deep Dive Into a FIN8 Attack - A Forensic Investigation. Retrieved September 1, 2021.
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Связанные риски
Каталоги
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