Hancitor — Office (OOXML) malware analysis

Static analysis result for SHA-256 ed7ce2bf667fe734…

MALICIOUS

Office (OOXML)

302.9 KB Created: 2021-09-27 19:09:13 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-10-02
MD5: 3e3833423d150dc2188cd12ac24b733d SHA-1: 248d4ba33f9a17dd6da6d5137c35f1d29d6247d5 SHA-256: ed7ce2bf667fe73444397c6f6c7f6611a4b131cbd4998125ea045765b4d3179a
120 Risk Score

Malware Insights

Hancitor · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with the signature Xls.Downloader.Hancitor03222-9941794-0, indicating it is likely part of the Hancitor family. Heuristics confirm the presence of Excel 4.0 macros, which are commonly used by Hancitor to download and execute further stages. The macro sheet itself is heavily obfuscated, but the presence of Excel 4.0 macros strongly suggests an intent to execute arbitrary code.

Heuristics 2

  • ClamAV: Xls.Downloader.Hancitor03222-9941794-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Hancitor03222-9941794-0
  • Excel 4.0 macro sheet (1 sheet(s)) critical OOXML_XLM_MACROSHEET
    Spreadsheet contains an Excel 4.0 (XLM) macro sheet — XLM was a major Office malware vector during 2020-2022 and evaded many VBA-focused controls before Microsoft tightened XLM defaults. Even legitimate XLM use is rare in modern workbooks. The macro sheet is stored as XLSB/BIFF12 binary content, which many XML-only OOXML scanners miss.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.bin xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.bin 5306 bytes
SHA-256: 3f325bc8ab32d6462e2d2f6b4946e4efbbd920dda8ab15cf61c69ba6a8dc0e11
Preview script
First 1,000 lines of the extracted script
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... (truncated)

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