Dridex — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 d04d9ff88c4f951d…

MALICIOUS

Office (OOXML) / .XLSM

51.6 KB Created: 2021-05-07 12:34:56 UTC Authoring application: Microsoft Excel 15.0300
MD5: 2610e5f9526bbf2171f07e3bd9989b10 SHA-1: 7764c634cd888c489323f37788311b11a3a9e280 SHA-256: d04d9ff88c4f951deb7c1a12636fa582ae3747d79d516420d2ca871a77a1dca0
248 Risk Score

Malware Insights

Dridex · confidence 95%

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

The sample is an XLSM file containing a Workbook_Open macro, which is a common technique for initiating malicious activity upon opening the document. The macro utilizes CreateObject to interact with Windows scripting components and execute commands, likely to download and run a second-stage payload from one of the provided URLs. The ClamAV detection explicitly identifies it as a Dridex downloader, supporting the observed behavior.

Heuristics 8

  • ClamAV: Xls.Downloader.DridexOffice0521-9863759-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.DridexOffice0521-9863759-0
  • 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://ammarakhizerkhan.com/wp-includes/sodium_compat/src/Core32/ChaCha20/Dn7zOdqooZVw.php
    • https://certifica.app.infoweb.boatcover.org/dt_091901820028/condivise/immagini/icone/icone-default-on/2NJsNm1KQuTMMVo.php
    • https://lerc.gov.lr/231electricity/editor/tinymce/themes/modern/Z9grXigF03Qy.php
    • https://37.fiveghosting.com/YyXdbwCNNeEkw.php
    • https://trenerwpoznaniu.pl/classes/tinymce/themes/inlite/config/WjCKp9Cb.php
    • https://buyjointsonline.com/wp-content/plugins/wpforms-lite/templates/emails/pM44c3eiAK6.php
    • https://ctfiladelfia.projetosestruturais.com/LR7u0G1zGjUJ.php
    • https://plusify.in/wp-admin/css/colors/blue/LbMOrvuqScsDDYJ.php
    • https://super-menu.it/includes/lib/HTMLPurifier/standalone/HTMLPurifier/wNYWKg4fYdO.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
239b494a3d84472a9ab4ab0e2a53fdc3a9230e820fdfe3b7075a9dbdc45d9b4a		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 41548 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
9ba4ea3ed986eb7db92252d19569b23fc8d08b93397ed5656c2fd2524658fe01		 vba-project OOXML VBA project: xl/vbaProject.bin 266752 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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