Emotet Office (OLE) malware analysis — malicious · c4daeb1197761ad6

MALICIOUS

Office (OLE)

164.6 KB Created: 2020-09-15 19:31:00 Authoring application: Microsoft Office Word

MD5: 0f18d485d620cee9fa28ebc3e2958f43 SHA-1: e29f9ed551d46af71dfaaa9a9ba46643d9aa5ffe SHA-256: c4daeb1197761ad6ebcf922fd44f7f3aed5d49a64e107dc1d79340f2a0b2ca36

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The critical ClamAV detection and high-severity heuristics for OLE_VBA_DOCOPEN, OLE_VBA_CREATEOBJ, and OLE_VBA_PCODE_AUTOEXEC_EXEC strongly indicate a malicious macro execution. The presence of a Document_Open macro that uses CreateObject is a common Emotet delivery technique. The ClamAV signature specifically names Emotet, increasing confidence in the family attribution. The extracted document body, though heavily obfuscated, contains what appears to be PowerShell commands, further supporting the execution of malicious code.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9761754-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9761754-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject 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.
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 http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `75714e73d3e8750b3760209a7997fccc8b6d96f31b59fa1d20ad2b0ef4583864`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	25430 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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