Doc.Trojan.Maldade-10036492-0 — Office (OOXML) malware analysis

Static analysis result for SHA-256 fee2798718977af0…

MALICIOUS

Office (OOXML)

16.8 KB Created: 2021-06-26 08:19:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-07-02
MD5: 7b24a530f4174c6354fc407a482e1412 SHA-1: 1b0a4f046de7a1a4e4b9ec45822cf22dcc66ea51 SHA-256: fee2798718977af0f42ff3af85033b971d5bb8f9bdb5af2515da3e669f8688f7
222 Risk Score

Malware Insights

Doc.Trojan.Maldade-10036492-0 · confidence 95%

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

The sample is identified as malicious by ClamAV and contains VBA macros. The 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic indicates that the AutoOpen macro executes a shell command. This suggests the document is designed to download and execute a second-stage payload, a common tactic for malware distribution. The presence of VBA macros points to a spearphishing attachment as the likely initial access vector.

Heuristics 5

  • ClamAV: Doc.Trojan.Maldade-10036492-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Maldade-10036492-0
  • 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 project inside OOXML medium 1 related finding OOXML_VBA
    Document contains a VBA project — VBA macros present
  • 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.
  • 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://schemas.microsoft.com/office/word/2010/wordprocessingCanvas In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 84 bytes
SHA-256: 3242813c0aec8f7d5a5717c3a79a65e1d01b3c0a3dc3a4b0eaffd61569e38909
Preview script
First 1,000 lines of the extracted script
Sub Hello()
Dim X
X=MsgBox("Hello VBS")
Sub Hello()
Dim X
X=MsgBox("Hello VBS")
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 15360 bytes
SHA-256: f4776f0b640ac2c4735b1523a103857a5a29cc79c1915e3b54c7c22c02811b82
Detection
ClamAV: Doc.Trojan.Maldade-10036492-0
Obfuscation or payload: likely
Carved artifact contains a PowerShell -EncodedCommand style payload. Carved artifact contains 24 long base64-like blob(s).

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