Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 fb41f8ce9d34f5ce…

MALICIOUS

Office (OLE) / .DOC

211.5 KB Created: 2021-09-14 06:05:00 Authoring application: Microsoft Office Word
MD5: c2ed8fc614aeda36a7e3a638fa7db16a SHA-1: 64860a9461cc8da7bdb58b45461227f8e4c554ad SHA-256: fb41f8ce9d34f5ceb42b3d59065f63533d4a93557f9353333cbc861e3aff1f09
330 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic

The sample is a malicious OLE document containing VBA macros, specifically an AutoOpen macro that executes code. The presence of references to PowerShell and WScript, along with a GetObject call and Shell execution, indicates an attempt to download and execute a secondary payload. The embedded URLs are highly suspicious and likely serve as the source for this payload. The ClamAV detection as 'Doc.Downloader.Valyria-10019379-0' further supports its role as a downloader.

Heuristics 10

  • ClamAV: Doc.Downloader.Valyria-10019379-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Valyria-10019379-0
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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
  • 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://ghapan.com/Kdg73onC3oQ/090921.html
    • https://gruasingenieria.pe/LUS1NTVui6/090921.html
    • https://yoowi.net/tDzEJ8uVGwdj/130921.html
    • https://chaturanga.groopy.com/7SEZBnhMLW/130921.html
    • https://lotolands.com/JtaTAt4Ej/130921.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
ae32d3abb3b1f574431a6aac76c1c044867d514682c1610a18eeb7cb9127d6cb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15257 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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