S1017 OutSteel
OutSteel is a file uploader and document stealer developed with the scripting language AutoIT that has been used by Ember Bear since at least March 2021.1
| Item | Value |
|---|---|
| ID | S1017 |
| Type | MALWARE |
| Version | 1.0 |
| Created | 09 June 2022 |
| Last Modified | 09 June 2022 |
| Navigation Layer | View In ATT&CK® Navigator |
Techniques Used
| Domain | ID | Name | Use |
|---|---|---|---|
| enterprise | T1071 | Application Layer Protocol | - |
| enterprise | T1071.001 | Web Protocols | OutSteel has used HTTP for C2 communications.1 |
| enterprise | T1119 | Automated Collection | OutSteel can automatically scan for and collect files with specific extensions.1 |
| enterprise | T1020 | Automated Exfiltration | OutSteel can automatically upload collected files to its C2 server.1 |
| enterprise | T1059 | Command and Scripting Interpreter | - |
| enterprise | T1059.003 | Windows Command Shell | OutSteel has used cmd.exe to scan a compromised host for specific file extensions.1 |
| enterprise | T1005 | Data from Local System | OutSteel can collect information from a compromised host.1 |
| enterprise | T1041 | Exfiltration Over C2 Channel | OutSteel can upload files from a compromised host over its C2 channel.1 |
| enterprise | T1083 | File and Directory Discovery | OutSteel can search for specific file extensions, including zipped files.1 |
| enterprise | T1070 | Indicator Removal | - |
| enterprise | T1070.004 | File Deletion | OutSteel can delete itself following the successful execution of a follow-on payload.1 |
| enterprise | T1105 | Ingress Tool Transfer | OutSteel can download files from its C2 server.1 |
| enterprise | T1566 | Phishing | - |
| enterprise | T1566.001 | Spearphishing Attachment | OutSteel has been distributed as a malicious attachment within a spearphishing email.1 |
| enterprise | T1566.002 | Spearphishing Link | OutSteel has been distributed through malicious links contained within spearphishing emails.1 |
| enterprise | T1057 | Process Discovery | OutSteel can identify running processes on a compromised host.1 |
| enterprise | T1204 | User Execution | - |
| enterprise | T1204.001 | Malicious Link | OutSteel has relied on a user to click a malicious link within a spearphishing email.1 |
| enterprise | T1204.002 | Malicious File | OutSteel has relied on a user to execute a malicious attachment delivered via spearphishing.1 |
Groups That Use This Software
| ID | Name | References |
|---|---|---|
| G1003 | Ember Bear | 1 |