Emooodldr — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 06012c700c1dac4c…

MALICIOUS

Office (OOXML) / .DOC

140.3 KB Created: 2021-11-15 15:39:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: 391dca4cf91ae12aa1b5ac9d0ac3ec41 SHA-1: 47cfcf587d838f68a8f8df53ea3afae475436992 SHA-256: 06012c700c1dac4c122303e920fdf1c71c41e681673c241c9698e5766df275a8
304 Risk Score

Malware Insights

Emooodldr · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Xls.Downloader.Emooodldr-10031562-0. It contains a VBA project with a Document_Open macro that uses CreateObject and GetObject, indicating it's designed to execute code. The extracted VBA script, 'macros.bas', contains functions that appear to download and process external files, likely to fetch and execute a second-stage payload.

Heuristics 9

  • ClamAV: Xls.Downloader.Emooodldr-10031562-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emooodldr-10031562-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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 project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Suspicious extracted artifact info 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.
  • 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.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2006/wordml

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e53e3734f5c43adf58370feee1b5707cc66f4a1c2cd43a48deedecacf5c12b3d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 4433 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
vbaProject_00.bin
48d1f2f9d2ac7884efe2565ed5da475928bfb31a3885a011bf0fa0ac12c1cc78		 vba-project OOXML VBA project: word/vbaProject.bin 16896 bytes
Detection
ClamAV: Xls.Downloader.Emooodldr-10031562-0
Obfuscation or payload: unlikely

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