Malicious Office (OOXML) / .XLSM — malware analysis report

Static analysis result for SHA-256 df8f8f32db5d0786…

MALICIOUS

Office (OOXML) / .XLSM

110.1 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 14.0300
MD5: 0a54558f873e05748b1cadfd7cc69c23 SHA-1: 524cbb8b09951493a34fbb26fd2154b993c12dd9 SHA-256: df8f8f32db5d0786e3d6b86c630eac93ab271cf3b4e4ae158b0d66747dd6b5f4
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic T1204.002 Malicious File: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The sample is an Excel 4.0 macro sheet (XLSM) that utilizes dangerous functions like CALL and EXEC, indicating an attempt to execute arbitrary code. The document body explicitly contains URLs that are likely intended to host and deliver a secondary payload. The presence of these dangerous functions and the explicit URLs strongly suggest a downloader or droppper functionality.

Heuristics 5

  • Excel 4.0 macro sheet (3 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.
  • Excel 4.0 Auto_Open defined name critical OOXML_XLM_AUTOOPEN_DEFINEDNAME
    Workbook defines _xlnm.Auto_Open or _xlnm.Auto_Close while containing an XLM macro sheet. This is the OOXML/XLSB auto-execution shape for Excel 4.0 macros.
  • Dangerous XLM formula APIs: EXEC, HALT, FORMULA, CALL, WORKBOOK.HIDE critical OOXML_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet uses formula APIs that call directly into Win32 (=CALL/=EXEC/=REGISTER/=FORMULA). These are the primitives used to download payloads, write files, and start processes from an XLM macro without invoking VBA.
  • Suspicious extracted artifact medium 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.
  • 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://crickethours.com/IkImEpMVhg9l/ind.html
    • https://bestarticleblog.com/4hJdeLGkb0/ind.html
    • http://schemas.openxmlformats.org/spreadsheetml/2006/main
    • http://schemas.microsoft.com/office/excel/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.xml
6d2587730d575d65758c76346fee2472fb2f7b6fe61081090157e25c607f964d		 xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet3.xml 1162 bytes
xlm_sheet_01.xml
c4d271a01c66108d509aa74cc4710bc42dc1678eff3ac44ff282f8745a8e3573		 xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet2.xml 4410 bytes
xlm_sheet_02.xml
36cf1ac1597d7dd896e68e5d54ee75138edf5519a32c6e136d06938108706499		 xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet1.xml 204995 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.