Dridex — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 200f05393dbba316…

MALICIOUS

Office (OOXML) / .XLSM

51.8 KB Created: 2021-05-07 12:30:44 UTC Authoring application: Microsoft Excel 15.0300
MD5: 710cf08f13c9ebcc0c3604ee82d984b1 SHA-1: 05795fd74c313313d01b0f5c39ae1357295b08da SHA-256: 200f05393dbba31613773c816d397c19ca9694e4707bc5b22990671c8da38d0f
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 that utilizes CreateObject to execute commands via rundll32.exe. This macro is designed to download and execute a second-stage payload from one of the embedded URLs. The ClamAV detection strongly suggests the Dridex family, known for its macro-based delivery.

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://sportsfort.com.pk/wp-content/themes/porto/scss/plugins/cH1xmIuywQD.php
    • https://cartoonist.me.uk/wp-content/plugins/jetpack/scss/_utilities/us1svv7BFHAuE.php
    • https://chefalle.com/wp-includes/sodium_compat/namespaced/Core/ChaCha20/4Uf6CSbEGj3.php
    • https://a14.fiveghosting.com/fBSkQClRc.php
    • https://firsthand.ng/wp-content/plugins/woocommerce/src/Admin/ZD21U3Bx6LCk.php
    • https://ramdevagroindustries.com/images/blog/WZVRzcoUaXZ.php
    • https://jajainfo.net/zm/wp-content/uploads/2013/06/b4KjNHHVq5p.php
    • https://lerc.gov.lr/231electricity/editor/tinymce/themes/modern/Z9grXigF03Qy.php
    • https://sige.net.br/images/features/LPdbPtlR.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
3f359e7ed2d1a8340f4754db01c16c4209d3f5d2450c58c33755d80447bbce1e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 42082 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
40dead4649597a6376815f898f6e0ff6592d2d3632189d3b10d88f7421ee2f84		 vba-project OOXML VBA project: xl/vbaProject.bin 265728 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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