Emotet — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 cbddc8fea92cdf40…

MALICIOUS

Office (OOXML) / .DOC

142.9 KB Created: 2021-11-15 15:39:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: fd08ef74dd2315c6b574ded888322230 SHA-1: 69ff3fbe15895e8c84c63f0702ed8733aff5f8d9 SHA-256: cbddc8fea92cdf40f8efac2fe8fa534d52d90cccecbb914f3827002f680da98a
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetRed112100-9910732-0', indicating it functions as a downloader. The presence of a 'Document_Open' macro and the use of 'CreateObject' are high-severity heuristics pointing to automated execution. The extracted VBA macro, though truncated, contains functions that appear to be involved in file handling and string manipulation, consistent with a payload download and execution mechanism. The primary IOCs are the embedded macro files.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed112100-9910732-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed112100-9910732-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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 project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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
ee40c43f0151294b75d201e0affb99d2166283b4691aa82122df86419d6d0f1c		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 5555 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
e39c523343f417fbe3cdd1a85ef292ca9aef8186e74741137134b84850e21180		 vba-project OOXML VBA project: word/vbaProject.bin 19968 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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