Scanner, tests, fixtures, taste, config, and docs for ScanDonut#400
Merged
phutelmyer merged 2 commits intotarget:masterfrom Oct 20, 2023
Merged
Scanner, tests, fixtures, taste, config, and docs for ScanDonut#400phutelmyer merged 2 commits intotarget:masterfrom
phutelmyer merged 2 commits intotarget:masterfrom
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Looks good / tests good 👍
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Describe the change
This PR implements ScanDonut that decrypts and extracts Donut loader payloads using Volexity's donut-decrypt.
Describe testing procedures
Docker build completed successfully including new ScanDonut tests. Test fixtures were scanned successfully with Fileshot UI.
Sample output
{ "strelka_response": [ { "file": { "depth": 0, "flavors": { "mime": [ "application/octet-stream" ], "yara": [ "hacktool_win_shellcode_donut" ] }, "name": "test_donut_compressed.bin", "scanners": [ "ScanDonut", "ScanEntropy", "ScanFooter", "ScanHash", "ScanHeader", "ScanTlsh", "ScanYara" ], "size": 33002, "tree": { "node": "07ffe24e-b9da-48a7-937d-5bad840ab2e1", "root": "07ffe24e-b9da-48a7-937d-5bad840ab2e1" } }, "request": { "attributes": { "filename": "test_donut_compressed.bin", "metadata": { "source": "fileshot-webui", "user_name": "strelka" } }, "client": "fileshot-webui", "id": "07ffe24e-b9da-48a7-937d-5bad840ab2e1", "time": 1695782935 }, "scan": { "donut": { "donuts": [ { "compression_type": "DONUT_COMPRESS_APLIB", "entropy_type": "DONUT_ENTROPY_DEFAULT", "instance_type": "DONUT_INSTANCE_EMBED", "instance_version": "1.0", "loader_version": "1.0_64", "module_type": "DONUT_MODULE_NET_DLL", "offset_loader_start": 7913, "offsets": { "encryption_start": 572, "size_instance": 4744 } } ], "elapsed": 0.024509, "total": { "donuts": 1, "files": 1 } }, "entropy": { "elapsed": 0.000101, "entropy": 6.972027095872512 }, "footer": { "backslash": "\\x04\\x8bL$\\x08S\\x8a\\x02\\x84\\xc0t\\x13\\x8a\\x19\\x84\\xdbt\\r\\x80\\xcb \\x0c :\\xc3u\\x04BA\\xeb\\xe7\\x0f\\xbe\\x02\\x0f\\xbe\\t+\\xc1[\\xc3\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00", "elapsed": 0.000027, "footer": "\u0004�L$\bS�\u0002��t\u0013�\u0019��t\r�� \f :�u\u0004BA��\u000f�\u0002\u000f�\t+�[�\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000" }, "hash": { "elapsed": 0.005378, "md5": "f410d9cb56ebab60777757bab2db4cf8", "sha1": "68218b1986d4f96d14b53f85fd3d2939e80271a9", "sha256": "12fb9e49eb9577cad1068fbc3f16223ae6f28e3c9f57048dd06a836295a7f1cd", "ssdeep": "768:LT8x/bcS7iKGztVuanh8w2OfJ7ejaP6yEqzeGO0gf:X8hbcS7i9u6yeNejY6yFOB", "tlsh": "T1AFE26C92E7B141E4EBA2C051FC25AB1BEFB1308E40646ADB77144D816B23A30BF1C79D" }, "header": { "backslash": "\\xe8\\xd5\\x1e\\x00\\x00\\xd5\\x1e\\x00\\x00\\xad\\xcb\\x0e\\xa0\\rmB\\xfb\\xb4\\xdfW\\xd7\\x0cT:\\xd9X%zo\\xca]\\x00\\xfb_\\xb9\\xf3'1\\x1e\\x0b`\\x00\\x00\\x00\\x00\\x01\\xe0\\xae\\xdeB", "elapsed": 0.000078, "header": "��\u001e\u0000\u0000�\u001e\u0000\u0000��\u000e�\rmB���W�\fT:�X%zo�]\u0000�_��'1\u001e\u000b`\u0000\u0000\u0000\u0000\u0001��B" }, "tlsh": { "elapsed": 0.001535 }, "yara": { "elapsed": 0.002738, "matches": [ "test" ] } } }, { "file": { "depth": 1, "flavors": { "mime": [ "application/vnd.microsoft.portable-executable" ], "yara": [ "mz_file" ] }, "scanners": [ "ScanEntropy", "ScanFooter", "ScanHash", "ScanHeader", "ScanPe", "ScanTlsh", "ScanYara" ], "size": 4096, "source": "ScanDonut", "tree": { "node": "c32683b0-d00f-4168-8f76-ddf559bb76ad", "parent": "07ffe24e-b9da-48a7-937d-5bad840ab2e1", "root": "07ffe24e-b9da-48a7-937d-5bad840ab2e1" } }, "request": { "attributes": { "filename": "test_donut_compressed.bin", "metadata": { "source": "fileshot-webui", "user_name": "strelka" } }, "client": "fileshot-webui", "id": "07ffe24e-b9da-48a7-937d-5bad840ab2e1", "time": 1695782935 }, "scan": { "entropy": { "elapsed": 0.000049, "entropy": 4.314502621279276 }, "footer": { "backslash": "\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00", "elapsed": 0.000024, "footer": "\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000" }, "hash": { "elapsed": 0.000187, "md5": "f58ebb5ce3e07a9dfc6dcca556b58291", "sha1": "67198a3ca72c49fb263f4a9749b4b79c50510155", "sha256": "f2f667e330da9f190eda77c74781963a0495c3953a653747fe475b99421efdda", "ssdeep": "48:6XZmqLorrAtzkuPS/6NMn3BCiLMjOiuCOlXTuZKFWpfbNtm:GmbWl8xCYDlTunzNt", "tlsh": "T1D281701183EA87B6E9334732BDB363804279FB41DCAB4B6F2884530B2D163544DA3F61" }, "header": { "backslash": "MZ\\x90\\x00\\x03\\x00\\x00\\x00\\x04\\x00\\x00\\x00\\xff\\xff\\x00\\x00\\xb8\\x00\\x00\\x00\\x00\\x00\\x00\\x00@\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00", "elapsed": 0.000027, "header": "MZ�\u0000\u0003\u0000\u0000\u0000\u0004\u0000\u0000\u0000��\u0000\u0000�\u0000\u0000\u0000\u0000\u0000\u0000\u0000@\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000" }, "pe": { ... }, "tlsh": { "elapsed": 0.00008 }, "yara": { "elapsed": 0.000061, "matches": [ "test" ] } } } ] }Checklist