MALICIOUS
250
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Service Execution: Service Execution
T1204.002 Malicious File: Malicious File
T1059.001 PowerShell: PowerShell
T1059.003 Command and Scripting Interpreter: Windows Command Shell
The file is an XLSM document containing Excel 4.0 macros. These macros utilize dangerous functions like FORMULA and REGISTER to download and execute payloads. Specifically, the macros construct commands to execute 'regsvr32' with downloaded files named 'Hikos.hertolo', 'Hikos.hertolo1', and 'Hikos.hertolo2'. The embedded URLs '91.211.91.97/185.117.75.123/' are likely sources for these payloads. The ClamAV detection as 'Xls.Downloader.IcedID' further supports this assessment.
Heuristics 6
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Excel 4.0 macro sheet (10 sheet(s)) critical OOXML_XLM_MACROSHEETSpreadsheet 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.
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Excel 4.0 Auto_Open defined name critical OOXML_XLM_AUTOOPEN_DEFINEDNAMEWorkbook 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.
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Dangerous XLM formula APIs: FORMULA, GOTO, REGISTER, HALT critical OOXML_XLM_DANGEROUS_FNExcel 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.
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ClamAV: Xls.Downloader.IcedID-9f1f1d193a2a2a2b-9951463-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Xls.Downloader.IcedID-9f1f1d193a2a2a2b-9951463-0
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Hidden worksheet (hidden) low OOXML_HIDDEN_SHEETExcel workbook contains 10 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
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Embedded URL info EMBEDDED_URLOne 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/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
- http://schemas.microsoft.com/office/spreadsheetml/2014/revision
- http://schemas.microsoft.com/office/spreadsheetml/2015/revision2
- http://schemas.microsoft.com/office/spreadsheetml/2016/revision3
- http://schemas.microsoft.com/office/spreadsheetml/2016/revision6
Extracted artifacts 10
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_sheet_00.xml1be8892bef9f9957bb32d2c77ba6054081ef0bc1d79ce7bef02d37f542dbf89b |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet1.xml | 3786 bytes |
xlm_sheet_01.xml05429996701eacd52396b49a7b542ebf5f54ec159e49392a0fde30360c280f6c |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet2.xml | 2017 bytes |
xlm_sheet_02.xmlc93414afa90d0aed96b0ce72668e15428c1af49ef990d4433b19efa6b27dd697 |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet3.xml | 2703 bytes |
xlm_sheet_03.xmlcaf907d21dc38a6bc75aedd846db9e62599779d4c2dbd3f24898f275d22c250a |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet4.xml | 1521 bytes |
xlm_sheet_04.xml7667966c8045cbbf1d7c1f279245a5e7c4ac004e5ebe30fbd872010d3792710f |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet5.xml | 1791 bytes |
xlm_sheet_05.xmlc2e30072b0b55de845ae0cc0cf580b57d25538df7bd72d890703ffb59bd466f3 |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet6.xml | 1667 bytes |
xlm_sheet_06.xml4a0db02a3673bae10855faec06cd35685ff751631b0072a271b38d935beecf95 |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet7.xml | 1735 bytes |
xlm_sheet_07.xmla0c80460b9f4e41cc5c80274d1c193d030f8b4e954b0aa51ef669e0af14e35d8 |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet8.xml | 1679 bytes |
xlm_sheet_08.xml1c52474b1448a0ffd9d21d1a06b05ada2668f4c15ffc52265026119f5dff69ca |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet9.xml | 1611 bytes |
xlm_sheet_09.xml6dabbcd902efa205f4f62712457f79144c15a373fe7c951a3cc043bb5817e545 |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/sheet1.xml | 1790 bytes |
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