SquirrelWaffle — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 d3a7697ff1d17f66…

MALICIOUS

Office (OLE) / .DOC

223.5 KB Created: 2021-09-17 07:49:00 Authoring application: Microsoft Office Word
MD5: 7f9e1b22e5e1b2d5025984aa27fd054b SHA-1: e8e93803e0809de38f830532eeae4ce74308e25d SHA-256: d3a7697ff1d17f66a8f03363371339e39cc32068589085b4b67b377f52786aac
302 Risk Score

Malware Insights

SquirrelWaffle · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample contains VBA macros that are automatically executed upon opening, as indicated by the AutoOpen macro and the Shell() call. The script reconstructs the command 'C:\ProgramData\vb.nip exe.vbs' to execute a VBScript file, which is likely a downloader for a second-stage payload. The ClamAV detection name 'Doc.Downloader.SquirrelWaffle09210-9895192-0' strongly suggests the SquirrelWaffle family. Several unknown URLs were extracted, which are likely used to host the secondary payload.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Downloader.SquirrelWaffle09210-9895192-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.SquirrelWaffle09210-9895192-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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 macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://priyacareers.com/u9hDQN9Yy7g/pt.html
    • https://perfectdemos.com/Gv1iNAuMKZ/pt.html
    • https://bussiness-z.ml/ze8pCNTIkrIS/pt.html
    • https://cablingpoint.com/ByH5NDoE3kQA/pt.html
    • https://bonus.corporatebusinessmachines.co.in/1Y0qVNce/pt.html
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2974b679d71d1cee38ac08145b96d261388e0026ef80c8441c0c7c07ea4c1ee5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23846 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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