Emotet — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 b6c7efb7aa8b7200…

MALICIOUS

Office (OOXML) / .XLSM

3.70 MB Created: 2021-05-10 15:57:42 UTC Authoring application: Microsoft Excel 15.0300
MD5: 056d978074261851acacbe2b47ed063b SHA-1: 99ec69644025d9a306d58562e7b8084f29ffc862 SHA-256: b6c7efb7aa8b7200e43cfd66d2d8c02a572daefbe6d3924604ba8873a5295576
308 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains a Workbook_Open macro that utilizes Wscript.Shell and MSXML2.XMLHTTP to download and execute a second-stage payload from one of the embedded URLs. The ClamAV detection explicitly names this as Emotet, and the heuristics strongly support a downloader functionality.

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://salvajeglamping.com/wp-content/js_composer_/include/params/animation_style/HMYopU9fekIL.php
    • https://greenbelt-mea.com/css/IYQWLc9dokeSK0.php
    • https://flexydeal.com/9cHA3CtT.php
    • https://mutlumedya.com/wp-content/plugins/js_composer/include/autoload/roR2rMO2Gr3K3.php
    • https://plajmarket.com/test/js/masterslider/skins/black-1/jZUAv16TOpcKz.php
    • https://meskot.org/wp-content/plugins/litespeed-cache/src/cdn/0Rek020ky.php
    • https://beta.hairshow.pt/Xkjfx6qv.php
    • https://inhousecare.org/GNyTpi4kVJrip.php
    • https://neatleedone.com/wp-content/plugins/bulk-attachment-download/jabd-downloads/1/ODsVQnOlgHO.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ce68ba9cd96a8c996b9a6b30cc0dbf205f7977ce5db1789d425c517a6d613206		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2724688 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
19e4df078caeb082c7187cbb7b3607501abb6abee1011eba1357a350f7607418		 vba-project OOXML VBA project: xl/vbaProject.bin 5547520 bytes
Detection
ClamAV: Doc.Downloader.Emotet-10019767-0
Obfuscation or payload: unlikely

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