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

Static analysis result for SHA-256 f80a9594cd2e0296…

MALICIOUS

Office (OLE) / .DOCX

38.5 KB Created: 2021-07-06 04:33:00 Authoring application: Microsoft Office Word
MD5: 1a7b98fe7796c6023fc5cc4e773d88ea SHA-1: 77a46fd61dafbd3cb28409a41107ad4e70fcd4cc SHA-256: f80a9594cd2e0296f0dd4394bd42a1aa31f75d8b7d6cae64fd8b9d00ffdd36ba
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The sample is a malicious Office document containing VBA macros. The macros utilize `CreateObject` and `CallByName` to dynamically execute code. The `Document_Close` subroutine shows a message box and then attempts to show a `frmFeedback` form. The `send` subroutine within the `Feedback` module constructs a POST request using `MSXML2.ServerXMLHTTP` to the URL `https://triste-mega-down.com/ecm/ibm/1629313448/feedback`. This indicates the document is designed to collect user input or download additional malicious content.

Heuristics 6

  • ClamAV: Doc.Downloader.Valyria-10033997-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Valyria-10033997-0
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName call
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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 https://triste-mega-down.com/ecm/ibm/1629313448/feedback
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
eece5c8b7fd4440887598978d4db76dc0d38fbf0fd4fbe6e5bbb2f3e165d4818		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3134 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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