SquirrelWaffle — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 dc678e0956deb727…

MALICIOUS

Office (OLE) / .DOCX

223.5 KB Created: 2021-09-17 07:49:00 Authoring application: Microsoft Office Word
MD5: c3bd4145feaaae541cb17ccc7cbd2e44 SHA-1: 4e898a4ba24a16780f4cc73c122a99530e0e265d SHA-256: dc678e0956deb7274d08d66cb679f1ff795d3c746d32754d01000a0c8f07f3ba
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, including an AutoOpen subroutine, which is a common technique for initial execution. The script uses Shell() to execute a command that reconstructs to 'C:\ProgramData\svb.nip exe.tpircs k/ dmc', indicating it's designed to download and run a second-stage payload. The ClamAV detection name 'Doc.Downloader.SquirrelWaffle09210-9895192-0' strongly suggests the SquirrelWaffle family, which is known for its macro-based download capabilities. Several unknown URLs were extracted, likely serving as the source for 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
7c85b94dda3739911e7d0bdb61e7e74a6c1211b91436a2f21fed02bb5b255287		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23847 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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