Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 5df117dcd73d2f02…

MALICIOUS

Office (OLE)

141.2 KB Created: 2020-10-15 06:34:00 Authoring application: Microsoft Office Word
MD5: dd8e9102b8ddea0e003e0a05a827134d SHA-1: f74db3f02285a1195e794a56752777132502d77c SHA-256: 5df117dcd73d2f02c9bd489af101429a3e6436ae86ae7b84868ffada8ae74a6d
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains a VBA macro that executes upon opening the document, as indicated by the Document_Open and CreateObject heuristics. The ClamAV detection explicitly names this as Emotet, a known downloader family. The VBA macro is heavily obfuscated but its structure and the presence of CreateObject suggest it is designed to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9778165-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778165-0
  • 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.
  • 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.

FilenameKindSourceSize
macros.bas
aa3822bbb419da819c0009ca2a50458591c2a917d376ecb16e3e87f227973bcb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10774 bytes

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