Emotet Office (OOXML) / .XLSM malware analysis — malicious · 46164c80b4e0040d

MALICIOUS

Office (OOXML) / .XLSM

3.69 MB Created: 2021-05-10 15:56:32 UTC Authoring application: Microsoft Excel 15.0300

MD5: caa97f57aafc7ffbcfbd9f26a0122653 SHA-1: 1b9e20e36094b9abcdfa5f0911860ba36b7e54ba SHA-256: 46164c80b4e0040d03d0fbdb9500d91454b24fc08a795378e7752f6bf9dfb8aa

308 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1218.011 Rundll32

The file is an XLSM document containing a Workbook_Open macro that utilizes CreateObject to execute commands via rundll32.exe. The ClamAV detection and heuristic firings strongly indicate Emotet. The embedded URLs are likely used to download and execute a second-stage payload, consistent with Emotet's typical behavior.

Heuristics 9

ClamAV: Doc.Downloader.Emotet-10019767-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-10019767-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND

Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
Suspicious extracted artifact high 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.
VBA project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
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://attendance.ehazira.com/bower_components/ckeditor/plugins/tableselection/styles/wCNDv2F8E.php
- https://wilsonsfarminc.net/wp-content/plugins/ml-slider/themes/architekt/2R6Z2lQ61mPq5x.php
- https://mtzasesores.com/wp-content/themes/invictus/templates/events/aVORUgnnJ.php
- https://nellyfunerals.co.za/VKzdkfe8ufv.php
- https://gntfuneralservice.co.za/EAmGBWN6sRjDF.php
- https://s3solutions.ae/d6dCRQeJGD00Os.php
- https://distribuidoraferdazi.com.mx/tienda/bootstrap/tools/fontawesome-free/css/OQMNEdPk.php
- https://test399.estore.vlinkhosting.com/keO6l8CTVAVBY.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `07624cbb5da3bbadd54a722a60af1a6b4d5975de85c4144fcae49d28ab752d4e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2621132 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `781dea67c6fae18dd12c2ff17cae6f5c31775e7277d5998dd2cbdc776b05c281`	vba-project	OOXML VBA project: xl/vbaProject.bin	5344256 bytes
Detection ClamAV: Doc.Downloader.Emotet-10019767-0 Obfuscation or payload: unlikely

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