HotCroissant
HotCroissant is a remote access trojan (RAT) attributed by U.S. government entities to malicious North Korean government cyber activity, tracked collectively as HIDDEN COBRA.[1] HotCroissant shares numerous code similarities with Rifdoor.[2]
Techniques Used
| Domain | ID | Name | Use | |
|---|---|---|---|---|
| Enterprise | T1010 | Application Window Discovery |
HotCroissant has the ability to list the names of all open windows on the infected host.[2] |
|
| Enterprise | T1059 | .003 | Command and Scripting Interpreter: Windows Command Shell |
HotCroissant can remotely open applications on the infected host with the |
| Enterprise | T1573 | .001 | Encrypted Channel: Symmetric Cryptography |
HotCroissant has compressed network communications and encrypted them with a custom stream cipher.[2][1] |
| Enterprise | T1041 | Exfiltration Over C2 Channel |
HotCroissant has the ability to download files from the infected host to the command and control (C2) server.[2] |
|
| Enterprise | T1083 | File and Directory Discovery |
HotCroissant has the ability to retrieve a list of files in a given directory as well as drives and drive types.[2] |
|
| Enterprise | T1564 | .003 | Hide Artifacts: Hidden Window |
HotCroissant has the ability to hide the window for operations performed on a given file.[2] |
| Enterprise | T1070 | .004 | Indicator Removal: File Deletion |
HotCroissant has the ability to clean up installed files, delete files, and delete itself from the victim’s machine.[2] |
| Enterprise | T1105 | Ingress Tool Transfer |
HotCroissant has the ability to upload a file from the command and control (C2) server to the victim machine.[2] |
|
| Enterprise | T1106 | Native API |
HotCroissant can perform dynamic DLL importing and API lookups using |
|
| Enterprise | T1027 | .002 | Obfuscated Files or Information: Software Packing |
HotCroissant has used the open source UPX executable packer.[2] |
| .013 | Obfuscated Files or Information: Encrypted/Encoded File |
HotCroissant has encrypted strings with single-byte XOR and base64 encoded RC4.[2] |
||
| Enterprise | T1057 | Process Discovery |
HotCroissant has the ability to list running processes on the infected host.[2] |
|
| Enterprise | T1053 | .005 | Scheduled Task/Job: Scheduled Task |
HotCroissant has attempted to install a scheduled task named "Java Maintenance64" on startup to establish persistence.[2] |
| Enterprise | T1113 | Screen Capture |
HotCroissant has the ability to do real time screen viewing on an infected host.[2] |
|
| Enterprise | T1489 | Service Stop |
HotCroissant has the ability to stop services on the infected host.[2] |
|
| Enterprise | T1518 | Software Discovery |
HotCroissant can retrieve a list of applications from the |
|
| Enterprise | T1082 | System Information Discovery |
HotCroissant has the ability to determine if the current user is an administrator, Windows product name, processor name, screen resolution, and physical RAM of the infected host.[1] |
|
| Enterprise | T1016 | System Network Configuration Discovery |
HotCroissant has the ability to identify the IP address of the compromised machine.[1] |
|
| Enterprise | T1033 | System Owner/User Discovery |
HotCroissant has the ability to collect the username on the infected host.[2] |
|
| Enterprise | T1007 | System Service Discovery |
HotCroissant has the ability to retrieve a list of services on the infected host.[2] |
|
Groups That Use This Software
| ID | Name | References |
|---|---|---|
| G0032 | Lazarus Group |