Emotet — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 080aeee87dacdc82…

MALICIOUS

Office (OLE) / .XLS

47.0 KB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel First seen: 2022-04-22
MD5: 1c0ef67418840bace31d3fb48d49918a SHA-1: 461e34d8732e400f95cffe9343025de94f21cbe4 SHA-256: 080aeee87dacdc82d27ee7f137deeb9108a5f98be6abd4d4ef56412de58357f1
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file contains Excel 4.0 macros, specifically an Auto_Open defined name, which is a critical finding. These macros are designed to execute dangerous functions, including the 'RUN' function, and are associated with downloading payloads from embedded URLs. The ClamAV detection as 'Doc.Downloader.Emotet04222-9946520-0' strongly suggests the Emotet family. The macros likely download and execute a second-stage payload from one of the provided URLs.

Heuristics 5

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • ClamAV: Doc.Downloader.Emotet04222-9946520-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet04222-9946520-0
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • 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 https://eleselektromekanik.com/69Iq5Pwbd0/s/
    • http://demo34.ckg.hk/service/Atk7RQfUV673M/
    • http://dupot.cz/tvhost/DUnMUvwZOhQs/
    • https://demo.icn.com.np/stories/Qk/
    • https://bitmovil.mx/css/TrgyPiTXy3/
    • http://focanainternet.com.br/erros/DepAK3p1Y/�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
2670f09984c9f89e0c31dbfd71e019d5945a5ba86b2e4e522615b22d445dd7f0		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8122 bytes

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