Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 860cc2215d589d9c…

MALICIOUS

Office (OLE) / .DOC

159.0 KB
MD5: b260dab82207e20d3520247484074ce2 SHA-1: 55ac436c1897b21c2019c84ee726b76d26bf1bee SHA-256: 860cc2215d589d9c1fc3e33d736e9714af81652559d5d3e352424210ef331bb2
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a malicious Office document containing obfuscated VBA macros, specifically a Document_Open auto-exec loader. Heuristics indicate the use of CreateObject and execution functions, typical for downloading and running further malware. ClamAV detection confirms it as a downloader, and the presence of a VBA macro named 'macros.bas' further supports this. The obfuscated nature of the script and its auto-execution upon opening are strong indicators of a malicious downloader.

Heuristics 7

  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • ClamAV: Doc.Downloader.EmotetRed0121-9822961-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed0121-9822961-0
  • 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
9b820b2402def2f5ee5a5a3a44ae4d03778e1b1e351b3b609e3682fdcff76601		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13140 bytes

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