Emotet Office (OLE) / .DOCX malware analysis — malicious · b4da5a271c46eb9d

MALICIOUS

Office (OLE) / .DOCX

161.5 KB Created: 2020-09-24 23:07:00 Authoring application: Microsoft Office Word

MD5: 8573b53ec9a15e534dfa1ec3f822c889 SHA-1: fae61737add46955cdd8344fb79cb05e422b14b3 SHA-256: b4da5a271c46eb9d526edea40d4f641a1a0da3dc6048ffc493b8fece7044022b

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The critical ClamAV detection and high-severity heuristics for VBA auto-execution and CreateObject indicate malicious intent. The presence of VBA macros, specifically a Document_Open macro, suggests an attempt to automatically execute code upon opening the document. The 'macros.bas' artifact further confirms the presence of VBA code. The document body, though heavily obfuscated, contains patterns that resemble encoded PowerShell commands, likely intended to download and execute a secondary payload. This aligns with Emotet's typical delivery mechanism.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9765780-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9765780-0
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` `822ca2bb5afccdd585dd9d4b3c04999cc0b411b7c4b99b6e373f1239fc1c4ef1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	26832 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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