Valyria — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 fdb5e8fce13ca2ca…

MALICIOUS

Office (OLE) / .DOCX

38.5 KB Created: 2021-07-06 04:33:00 Authoring application: Microsoft Office Word
MD5: c7fff27cfe879c6993641a0659bf5f39 SHA-1: 10ce9bdddfe33517eaf352d671f20f83236c4757 SHA-256: fdb5e8fce13ca2cacf1b77ba5bebe738687357a28be09280d5fffb341ceccd16
202 Risk Score

Malware Insights

Valyria · confidence 95%

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 functions, indicative of malicious intent. The ClamAV detection 'Doc.Downloader.Valyria-10033997-0' strongly suggests the Valyria family. The script attempts to send data via HTTP POST to 'https://triste-mega-down.com/ecm/ibm/1629313017/feedback' using 'MSXML2.ServerXMLHTTP', likely to exfiltrate user-submitted information from a fake feedback form presented to the user upon closing the document.

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/1629313017/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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