Dridex — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 2953a18f4de2ebde…

MALICIOUS

Office (OOXML) / .XLSM

597.8 KB Created: 2021-05-10 16:23:26 UTC Authoring application: Microsoft Excel 15.0300
MD5: 0699dee157589823186f55ec69247976 SHA-1: ab04139f7b9c185d73c1ef56154daa5f66b1f692 SHA-256: 2953a18f4de2ebde8fc102e952ae2573f56f2b4be4054ad12b75b5608a79ca44
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 presence of a Workbook_Open macro, CreateObject calls, and the use of Wscript.Shell indicate malicious VBA code execution. The ClamAV detection and embedded URLs strongly suggest this is a Dridex downloader variant. The script likely downloads and executes a second-stage payload from one of the provided URLs.

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://nellyfunerals.co.za/VKzdkfe8ufv.php
    • https://odishapolitics.in/install/config/SKqRQiUmRPk.php
    • https://pointmultimedia.ro/wp-content/plugins/vc-extensions-bundle/borderhover/css/XALocVvcrU.php
    • https://test651.estore.vlinkhosting.com/QhX2IwPp5Tsl.php
    • https://araitrade.com/dbi1vnDj.php
    • https://irelandpony.com/index_htm_files/W61khLnS.php
    • https://marianayalfonso.com/wp-content/plugins/mpc-massive/panel/extra/cdJv1ZjMU3JsM.php
    • https://greenbelt-mea.com/css/IYQWLc9dokeSK0.php
    • https://bay.mx/images/igfx9IW9M8o9.php
    • https://blueserver1.com/wp-content/themes/twentynineteen/sass/blocks/HvYsDq5cA6.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6a31efe9ddd32258ac99e27663bcf59095d0743b18c65fc5ae1d362164c8a73d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 408386 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
1c6a68529879345d419b10d1b214d4894f9ec3075538f38aa8f99cbadbf04629		 vba-project OOXML VBA project: xl/vbaProject.bin 877056 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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