Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 dab966a428bec805…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 31ddca45a6887f0b5aa4302600fffb84 SHA-1: b1a5ccdd63f6faf731e9085d74b6034f759d1386 SHA-256: dab966a428bec805b91d808c220414ca82f28d180614eff77c841cdee85544a3
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 a Workbook_Open auto-execution and CreateObject call, strongly indicate malicious intent. The VBA script attempts to download and execute a second-stage payload from the reconstructed URL 'http://midnighsilverbcraft.com/store/wBjNEnoughw/BI710N4cQ6R3/' and 'https://redington.karmat', and writes batch and VBScript files to disk. The presence of Emotet-related indicators further supports this classification.

Heuristics 6

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
452afbab8b5882b16cbdec97efcd2c90da1a91d5c307bc937aef81b5f7828a0c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 52433 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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