Doc.Dropper.Agent-6337097-0 — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 4ffbdd599dd5aa09…

MALICIOUS

Office (OLE) / .DOCX

180.5 KB Created: 2017-05-28 22:10:00 Authoring application: Microsoft Office Word
MD5: 41158a1ef791dd5dafb51326e7719b3c SHA-1: 76964d25a126a5595d87f485fb88bce1f6f34b01 SHA-256: 4ffbdd599dd5aa09f8c3f7e3db0b3c169ba38106db6192a59194e79ef60f957b
220 Risk Score

Malware Insights

Doc.Dropper.Agent-6337097-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the Document_Open and OLE_VBA_PCODE_AUTOEXEC_EXEC heuristics. This macro leverages the WriteProcessMemory API, a common technique for executing shellcode or downloading additional payloads. The ClamAV detection name 'Doc.Dropper.Agent-6337097-0' strongly suggests its role as a dropper.

Heuristics 6

  • Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORY
    Reference to WriteProcessMemory API
  • ClamAV: Doc.Dropper.Agent-6337097-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6337097-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/photoshop/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
68ad9025b7a0ace2aaaa782dcb638257d61900bb2a198adec55181972cb99caf		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13167 bytes

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