Emotet — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 36e5ed3074f159cd…

MALICIOUS

Office (OOXML) / .XLSM

3.05 MB Created: 2021-05-10 11:49:18 UTC Authoring application: Microsoft Excel 15.0300
MD5: 5b53732883728eee4671836d1fa6b4e3 SHA-1: 62c0d0074d0f58dc4f21284797c6aff5f58bc693 SHA-256: 36e5ed3074f159cddac23394a6704779a29638a96bac25499f7c3c600933dcec
308 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1218.011 Rundll32 T1059.005 Visual Basic

The file is an XLSM document containing a Workbook_Open macro that utilizes CreateObject to execute shell commands, likely via rundll32.exe. This behavior is consistent with Emotet's typical download and execution of second-stage payloads. The embedded URLs are highly suspicious and likely serve as the distribution points for the malware.

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://blockeddraincornwall.com/css/skins/blog/webcomic/css/vEufn1n9YA69Je.php
    • https://lernendeutsch.de/App/vendor/phar-io/manifest/examples/rC6SrlTXo3VNK9.php
    • https://inhousecare.org/GNyTpi4kVJrip.php
    • https://sensor-tek.com/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/bBNTmfXZbIc.php
    • https://espgamerica.com/vendor/rvsitebuilder/core/fonts/vendor/Od8ptePPjMagXHZ.php
    • https://kronocreativeagency.com/wp-content/themes/twentynineteen/template-parts/content/O9chyPRvQDmYt.php
    • https://beta.hairshow.pt/Xkjfx6qv.php
    • https://memeker.mobi/nbproject/QokpcNCVMat.php
    • https://agenciadm.com.mx/images/portfolios/app/m9wyRuevyy2gX.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
99d4a3242a905fb713d7916796ca7229691d403383ce7407b1af90d77ff63109		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2236097 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
6c346197f1dfa11e8d773127ebb6f57a8a765ffe7763f4af232eddd21f3c6294		 vba-project OOXML VBA project: xl/vbaProject.bin 4576768 bytes
Detection
ClamAV: Doc.Downloader.Emotet-10019767-0
Obfuscation or payload: unlikely

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