Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 f0073fcb16de6f8c…

MALICIOUS

Office (OLE) / .XLS

133.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 3d6a59b16e0992c234a9e649272d9183 SHA-1: d40763ea2a87946c34137adcca9d72a9dbb4f190 SHA-256: f0073fcb16de6f8c5c497d318853c3eaf9fb3d03d85ecaf009a33de179c879a2
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file contains VBA macros, including Auto_Open and Auto_Close, which are commonly used to initiate malicious actions upon opening or closing a document. A critical heuristic indicates the use of the URLDownloadToFile API, suggesting the macro's purpose is to download a payload from one of the embedded URLs. The ClamAV detection name 'Doc.Downloader.Docusign112100-9908075-0' further supports this, indicating a downloader functionality. The script itself appears to be primarily for UI manipulation, but the presence of the URLDownloadToFile API and the downloader heuristic strongly implies a malicious payload download.

Heuristics 6

  • Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD
    Reference to URLDownloadToFile API
  • ClamAV: Doc.Downloader.Docusign112100-9908075-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign112100-9908075-0
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • 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://190.14.37.107/
    • http://94.140.114.111/
    • http://188.165.62.50/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
541bbf3f48f1b6b9352193868b1eb5b24144876194b7b7b4286dd723c387496c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4961 bytes

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