Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 82b25f195db0033b…

MALICIOUS

Office (OLE)

171.6 KB Created: 2020-08-07 21:57:00 Authoring application: Microsoft Office Word
MD5: c9a8dc20722caceaa02413b3154d312d SHA-1: 09e08d8874b48a6577a9bd0d57fb945f7b700938 SHA-256: 82b25f195db0033b5d1705ff3d18a635a7bfdae1a8b5ef2043f98b4dfedbd74f
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of malicious intent. The presence of a CreateObject call and the ClamAV detection signature 'Doc.Downloader.Sagent-9241484-0' strongly suggest this document is designed to download and execute a secondary payload. The obfuscated script content prevents a more detailed analysis of the exact payload or C2 communication.

Heuristics 7

  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
  • ClamAV: Doc.Downloader.Sagent-9241484-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Sagent-9241484-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5d99dea1bd959225d228b7ac48182fb73f8c2e41ad3681b5f282b862a6f65927		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3994 bytes

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