rtfraptor：從惡意RTF文件中提取OLEv1對象的工具

介紹

rtfraptor是一個簡單的工具，通過提取OLEv1對象分析惡意RTF文件。它的工作原理是運行Word並攔截對OLEv1函數的調用。從內存中轉儲原始OLE對象以進行進一步分析。這個工具有以下優點：

1.避免手動分析混淆的RTF文件。

2.提取惡意對象（打包程序對象，公式編輯器濫用，嵌入式文檔等）。

3.確定RTF文檔試圖濫用的漏洞（或功能）。

4.驗證其他工具的輸出（例如靜態文檔解析器）。

安裝

$ pip install rtfraptor這將自動獲取並安裝依賴項。 建議在虛擬環境中安裝。

用法

至少需要傳遞--executable和--file參數，如下所示：

(analysis_venv) > rtfraptor --executable "C:Program FilesMicrosoft OfficeOffice15WINWORD.EXE" --file 7296D52E0713F4BF15CD4E80EF0DA37E.rtf

要保存JSON輸出並將原始OLEv1對象轉儲到磁碟，請傳遞以下選項：--json output.json --save-path ole_parts注意：此工具運行Word。 應該在虛擬機內部分析可疑文檔。 該工具不會停止執行任何payload，將虛擬機與任何網路隔離。

輸出

原始對象輸出

可以使用--save-path選項存儲原始OLEv1對象。下面是一個包含可移植可執行文件的Packager對象示例。

00000000  01 05 00 00 02 00 00 00 08 00 00 00 50 61 63 6b  |............Pack|
00000010  61 67 65 00 00 00 00 00 00 00 00 00 fe 12 00 00  |age.........t...|
00000020  02 00 63 72 6f 73 73 61 61 61 2e 64 6c 6c 00 43  |..crossaaa.dll.C|
00000030  3a 5c 63 72 6f 73 73 61 61 61 2e 64 6c 6c 00 00  |:crossaaa.dll..|
00000040  00 03 00 31 00 00 00 43 3a 5c 55 73 65 72 73 5c  |...1...C:Users|
00000050  52 65 76 65 72 73 65 5c 41 70 70 44 61 74 61 5c  |ReverseAppData|
00000060  4c 6f 63 61 6c 5c 54 65 6d 70 5c 63 72 6f 73 73  |LocalTempcross|
00000070  61 61 61 2e 64 6c 6c 00 00 12 00 00 4d 5a 90 00  |aaa.dll.....MZ..|
00000080  03 00 00 00 04 00 00 00 ff ff 00 00 b8 00 00 00  |........??..?...|
00000090  00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 00  |....@...........|
000000a0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  |................|
000000b0  00 00 00 00 00 00 00 00 d8 00 00 00 0e 1f ba 0e  |........?.....o.|
000000c0  00 b4 09 cd 21 b8 01 4c cd 21 54 68 69 73 20 70  |.′.í!?.Lí!This p|
000000d0  72 6f 67 72 61 6d 20 63 61 6e 6e 6f 74 20 62 65  |rogram cannot be|
000000e0  20 72 75 6e 20 69 6e 20 44 4f 53 20 6d 6f 64 65  | run in DOS mode|
... snip ...

命令行輸出

生成控制台輸出，列出所有可疑的OLE對象（oletools.common.clsid中的對象）：

(analysis_venv) > rtfraptor --executable "C:Program FilesMicrosoft OfficeOffice15WINWORD.EXE" --file 7296D52E0713F4BF15CD4E80EF0DA37E.rtf --json output.json --save-path ole_parts
WARNING Suspicious OLE object loaded, class id 00020821-0000-0000-C000-000000000046 (Microsoft Excel.Chart.8)
WARNING Object size is 390702, SHA256 is 2a7f92bf37cef77c4fa2e97fcf3478b3e4e4296514817bd8c12e58300b485406
WARNING Suspicious OLE object loaded, class id 00020821-0000-0000-C000-000000000046 (Microsoft Excel.Chart.8)
WARNING Object size is 390190, SHA256 is f8ac5b37f52b6316178c293704fcc762d0a29d2700c7eda53724f552413c7b98
WARNING Suspicious OLE object loaded, class id F20DA720-C02F-11CE-927B-0800095AE340 (OLE Package Object (may contain and run any file))
WARNING Object size is 359115, SHA256 is 2ea248d43d4bd53e234530db0de2517a7f44deba5f43367636232019b2e9e822
WARNING Suspicious OLE object loaded, class id F20DA720-C02F-11CE-927B-0800095AE340 (OLE Package Object (may contain and run any file))
WARNING Object size is 4902, SHA256 is 28c9afbe46a35a6d7115ca3da535854efddc9749f1ff13722fa98d2bd3a8122b
WARNING Suspicious OLE object loaded, class id F20DA720-C02F-11CE-927B-0800095AE340 (OLE Package Object (may contain and run any file))
WARNING Object size is 5926, SHA256 is 5b5850f3217e8465d6add2da18a495d87d33552c6c8f400e52e5ab9cf06ba2e9
WARNING Suspicious OLE object loaded, class id 0002CE02-0000-0000-C000-000000000046 (Microsoft Equation 3.0 (Known Related to CVE-2017-11882 or CVE-2018-0802))
WARNING Object size is 7727, SHA256 is 38d9e74ede4ef67e78e028ecd815c54a777e11c6c4e7838ecbe26fd7e7c03d7c
WARNING Suspicious OLE object loaded, class id 0002CE02-0000-0000-C000-000000000046 (Microsoft Equation 3.0 (Known Related to CVE-2017-11882 or CVE-2018-0802))
WARNING Object size is 7727, SHA256 is a612b7b97f021797c5911cfe02bd9a145f96abb880990830eaf021f98a4a7c8a

json輸出

如果傳遞了--json選項，該工具將以JSON格式生成輸出,以下格式：

{
  "sha256": "8326bcb300389a2d654e6e921e259e553f33f8949984c2da55ccb6e9ed3f6480",
  "input_file": "7296D52E0713F4BF15CD4E80EF0DA37E.rtf",
  "objects": {
    "0": {
      "class_id": "00020821-0000-0000-C000-000000000046",
      "sha256": "2a7f92bf37cef77c4fa2e97fcf3478b3e4e4296514817bd8c12e58300b485406",
      "description": "Microsoft Excel.Chart.8",
      "size": 390702
    },
    ... snip ...
    "2": {
      "class_id": "F20DA720-C02F-11CE-927B-0800095AE340",
      "sha256": "2ea248d43d4bd53e234530db0de2517a7f44deba5f43367636232019b2e9e822",
      "description": "OLE Package Object (may contain and run any file)",
      "size": 359115
    },
    ... snip ...
    "5": {
      "class_id": "0002CE02-0000-0000-C000-000000000046",
      "sha256": "38d9e74ede4ef67e78e028ecd815c54a777e11c6c4e7838ecbe26fd7e7c03d7c",
      "description": "Microsoft Equation 3.0 (Known Related to CVE-2017-11882 or CVE-2018-0802)",
      "size": 7727
    },
    ... snip ...
}

*

參考來源：github，由周大濤編譯，轉載請註明來自FreeBuf.COM

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