Emotet Office (OOXML) / .XLSM malware analysis — malicious · 563a23db5d0e950f

MALICIOUS

Office (OOXML) / .XLSM

95.2 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2022-02-25

MD5: a6249863ef9d492cd3223189efb3e5f3 SHA-1: 5d35750c1a83e36220ed47202f332bce63488284 SHA-256: 563a23db5d0e950ffa53e6c2f7c8f6ee5af79e2922e20ca510150d403fb76059

250 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

This XLSM file contains Excel 4.0 macros, identified by critical heuristics for macro sheets and dangerous API calls like FORMULA. The macros are designed to download a payload from one of the provided URLs, specifically using 'regsvr32.exe' to execute it. The ClamAV detection name 'Xls.Downloader.Emotet02220-9940466-0' strongly suggests the Emotet family. The presence of multiple suspicious URLs and the use of dangerous macro functions indicate a downloader functionality.

Heuristics 6

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: FORMULA 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.
ClamAV: Xls.Downloader.Emotet02220-9940466-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Emotet02220-9940466-0
Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET

Excel workbook contains 5 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
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://ashirvadgroup.com/wp-admin/LtoH5AWneDBZIV2D/
- https://patriciamirapsicologa.com/wp-includes/fVVa9DXB/
- https://forfreeiptv.com/wp-admin/s5Oxoskqv8/
- https://dehraduncabs.com/wp-includes/9xqp/
- https://imprecof.com/i/QPWeAg0C1hh/
- 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_sheet_00.xml` `90e37e1ee0ab1fa1161bc9308b04f0f335c97d1feb756097ceb983695c1599e5`	xlm-macrosheet	OOXML XLM macro sheet: xl/macrosheets/intlsheet1.xml	3554 bytes
`xlm_sheet_01.xml` `966e861f35410708893ffb1f97241504111fc93333012aa9c7613d379c3c60bb`	xlm-macrosheet	OOXML XLM macro sheet: xl/macrosheets/sheet1.xml	1204 bytes
`xlm_sheet_02.xml` `60579741b1b65a4181fd818a651bece32da461189f50a30098e233a7c5fed525`	xlm-macrosheet	OOXML XLM macro sheet: xl/macrosheets/sheet2.xml	1227 bytes

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