Emotet — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 e7489154b503a8e0…

MALICIOUS

Office (OOXML) / .XLSM

3.64 MB Created: 2021-05-10 15:57:56 UTC Authoring application: Microsoft Excel 15.0300
MD5: 99dec8638e426135ec30633fd5b2c0b3 SHA-1: e57666b09442df0d5b9a27cb936a4692e83efc38 SHA-256: e7489154b503a8e026a843bad72602348e41178c092289f0932271f481cedbfa
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 presence of a Workbook_Open macro, CreateObject calls, and the use of rundll32.exe strongly indicate malicious intent. The ClamAV detection as 'Doc.Downloader.Emotet' further supports this. The VBA macros likely download and execute a second-stage payload from one of the embedded URLs, consistent with Emotet's typical behavior.

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://www.bodrumtemizlik.com.tr/galeri/big/adNWz8p6jh.php
    • https://odishapolitics.in/install/config/SKqRQiUmRPk.php
    • https://espgamerica.com/vendor/rvsitebuilder/core/fonts/vendor/Od8ptePPjMagXHZ.php
    • https://tseboprocurement.co.za/inc/phpmailer/test_script/images/_notes/E3KYpyHWeU.php
    • https://archampton.com/wp-content/plugins/kirki/controls/css/Ic6AlDEacA.php
    • https://quicklane.ae/llKTfaRKu9cHNme.php
    • https://toptaxi24.com/toptest/toptaxi/homedir/mail/cur/JqV4fB12DW8cw.php
    • https://memeker.mobi/nbproject/QokpcNCVMat.php
    • https://sensor-tek.com/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/bBNTmfXZbIc.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
fd08cc1be6df11efa8a03a20b4731cae96dd71994719da8582c94a2424a1e18f		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2705701 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
7176d4dde15dee6f98c316bc0c3c21ae53a431202a45ad3927a8309aef705508		 vba-project OOXML VBA project: xl/vbaProject.bin 5499392 bytes
Detection
ClamAV: Doc.Downloader.Emotet-10019767-0
Obfuscation or payload: unlikely

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