Emotet Office (OOXML) / .XLSM malware analysis — malicious · 06965cc9c20fdb32

MALICIOUS

Office (OOXML) / .XLSM

46.5 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2022-03-02

MD5: 494d5a12f2bd87730abdc9d8c79e9dd4 SHA-1: b2d7b9054b2f7f6874b0dc0d5055c18fef24ad2f SHA-256: 06965cc9c20fdb3274e27b4bf30f2fd32f9ec2a29f0b86d07f36b0f2dbc01d00

250 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1203 Exploitation for Client Execution T1105 Ingress Tool Transfer

The file is an Excel XLSM document containing Excel 4.0 macros, as indicated by multiple critical heuristics. These macros utilize dangerous functions like FORMULA to download payloads from several suspicious URLs, including http://rosywhitecleaningsolution.com/wp-admin/PqMw6fND8Bb1I4VPR10/. The macros also construct commands to execute 'regsvr32.exe' with downloaded payloads, a common technique for Emotet. The ClamAV detection further supports the Emotet family attribution.

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.Emotet03220-9940726-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Emotet03220-9940726-0
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 http://rosywhitecleaningsolution.com/wp-admin/PqMw6fND8Bb1I4VPR10/
- http://aopda.org/wp-content/uploads/RDL75PME7OKHk4f/
- http://havilaholuemglobal.com/dofz29/ymIfCcEL8I5kjA6E/
- https://chera.co.kr/wp-includes/i2nnUkDXZ/
- http://www.floresguitarinstruction.com/wp-admin/jWlCX/
- http://www.drcc.co.za/restoredcontent/nAKvnbRpazx7c/
- 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` `c2beed76b90707ab99d3556b095847fbe67565665bab2978d4d40d1b769c68e7`	xlm-macrosheet	OOXML XLM macro sheet: xl/macrosheets/intlsheet1.xml	4017 bytes
`xlm_sheet_01.xml` `3f1e04bcb932a0d7a0ca09ad6e05d398d7a144c4cda86314010c0ec3e9f94573`	xlm-macrosheet	OOXML XLM macro sheet: xl/macrosheets/sheet1.xml	1278 bytes
`xlm_sheet_02.xml` `3877aa64e871d2d6fcc766f5b3af64ba0d301f656023d2e6e43652b8210d827c`	xlm-macrosheet	OOXML XLM macro sheet: xl/macrosheets/sheet2.xml	1152 bytes

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