Xls.Dropper.Agent-7664623-0 — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 b3bde3c652a35693…

MALICIOUS

Office (OLE) / .DOC

222.0 KB Created: 2020-04-07 08:55:27 Authoring application: Microsoft Excel
MD5: 08b4da9d22e2baa676b289a21dd974e0 SHA-1: bd7f8a405db7f3d203dc24eb4c1f7cac8c27def3 SHA-256: b3bde3c652a356939424752277c140c7054bf7cd960323e668c2364f76e2687d
120 Risk Score

Malware Insights

Xls.Dropper.Agent-7664623-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The file is identified as malicious by ClamAV as Xls.Dropper.Agent-7664623-0. Static analysis revealed the presence of Excel 4.0 macros, specifically an Auto_Open macro that utilizes dangerous formula APIs, indicating it's designed to execute arbitrary code. The macro sheet itself is named 'Sheet1', which is a common indicator for macro-based execution.

Heuristics 4

  • ClamAV: Xls.Dropper.Agent-7664623-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7664623-0
  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.microsoft.com/photo/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
faf57f1701e6e03012f860825661a6f17c1c0a4b654fa0530ea1bc59db4b262f
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 42532 bytes