Emotet — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 e440f26a6a8f9c3f…

MALICIOUS

Office (OOXML) / .XLSM

2.86 MB Created: 2021-05-06 15:10:20 UTC Authoring application: Microsoft Excel 15.0300
MD5: dbd002725fbb531c845de101c3e80937 SHA-1: c6206fc230d75475bd9077a946d807ed2b0b970e SHA-256: e440f26a6a8f9c3fd83fea82b8b276926b4d87889c29f4358385d08c1b5554dc
308 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample contains a Workbook_Open macro that utilizes CreateObject and Environ calls, indicative of malicious intent. The macro is designed to download and execute a second-stage payload from one of the provided URLs. This behavior, combined with ClamAV detections for Emotet, strongly suggests a downloader functionality typical of the Emotet family.

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://italmaps.com/nuovo/wp-includes/js/jquery/ui/vUYhCCeCNKQoEk.php
    • https://touchuphouse.com/wp-content/plugins/wp-file-manager/inc/images/VsMQ4PexH.php
    • https://darkmattercompany.com/billing/templates/orderforms/comparison/images/OMqNCOuk.php
    • https://bhuttangill.com/wp-includes/js/tinymce/themes/inlite/Agk5yxu6D3SEW.php
    • https://hamdanigroupofcompanies.com/wp-content/plugins/case-theme-import/includes/api/e1KqWCgL.php
    • https://skyblix.ml/wp-content/plugins/astra-widgets/classes/widgets/7c1Qn1myq.php
    • https://multigranos.com.bo/wp-content/plugins/woocommerce/i18n/languages/SFMm6Qoe.php
    • https://wypozyczalnia-dragon.pl/libraries/fof/integration/joomla/filesystem/DDjThQ9ZgjkX.php
    • https://vipecotton.com/wp-content/plugins/wpml-media-translation/res/css/7q0Vreh38laGy9.php
    • https://tafaghodi.ir/resume/files/EHEtRsJyIPR6o75.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4b01380d4c0e41f55643198da7e72e943d8c437252e88131323f28a609bd40d3		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1992908 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
e88d259f9857129372bd2ed15875885c28b59dbefcf3402e0c3c2c6041d7a7f0		 vba-project OOXML VBA project: xl/vbaProject.bin 4055040 bytes
Detection
ClamAV: Doc.Downloader.Emotet-10019767-0
Obfuscation or payload: unlikely

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