Emotet Office (OOXML) / .XLSM malware analysis — malicious · 1504752ec20f78a6

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: 603188e0edbc9512f72d8ec418229120 SHA-1: 2c7e2bb0a4ff90e0b10f962522d9641e45b715db SHA-256: 1504752ec20f78a6ab5388760a9dfe02c248c3f907fdb2ad384910f581a07a88

290 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

This Excel file contains critical Excel 4.0 macros that utilize dangerous formula APIs to download and execute payloads. The ClamAV signature specifically identifies it as an Emotet downloader. The macros construct URLs and use `regsvr32.exe` to fetch and run a second-stage payload from the provided malicious domains.

Heuristics 7

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
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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://thejobinassam.com/OLD/3r8/
- https://ishigamitoshio.com/cgi-bin/tiL/
- https://fraudaware.org.uk/wp-admin/UPeayYdSM/
- https://angelstorehd.com/wp-includes/LBp6MO3/
- https://secsystembr.000webhostapp.com/wp-admin/ylfPOuPRX7skNx/
- 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.