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

Static analysis result for SHA-256 ffb3152e993d77a6…

MALICIOUS

Office (OLE) / .XLS

1.14 MB Created: 2025-04-28 12:16:01 Authoring application: Microsoft Excel
MD5: d4ef752640579ab43fbec4ca8c9b77eb SHA-1: 30dbff72cc47fe74c19ea4a6517f71b0f6cf4e98 SHA-256: ffb3152e993d77a65c1b9c54a558f9ca8038d08b486050bddb345ca222077807
308 Risk Score

Malware Insights

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

The sample is an Excel file containing a Workbook_Open macro, which is a common technique for initial execution. The macro utilizes CreateObject and CallByName, indicating it's designed to run arbitrary code. This code likely downloads and executes a second-stage payload, as suggested by the presence of embedded URLs and references to ShellExecute and WScript. The document body's XML structure for custom UI elements does not directly indicate malicious intent but is part of the overall file structure.

Heuristics 10

  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName 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://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/graphall_enabled.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/montior.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/listofvalues.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/filter.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/download_enabled.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/graphselection_enabled.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/settings_enabled.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/uploadall_enabled.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/switchresponsibility.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/resetfilters_enabled.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/upload.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_MEDIA/graphvariation_enabled.png
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_HTML/ebsp
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_HTML/BneUploaderService_HD
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_HTML/BneDownloadService_H@
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_HTML/BneApplicationServiced.karuvE
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_HTML/BneComponentService�@
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_HTML/�
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_HTML//
    • https://dcebsprd.karuvoolam.tn.gov.in:443/OA_HTML//BneUploaderService?bne:tickleSession=Truetn�
    • http://schemas.microsoft.com/office/2006/01/customui
    • http://schemas.openxmlformats.org/package/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/image
    • http://schemas.microsoft.com/office/2006/relationships/ui/extensibility
    • http://schemas.openxmlformats.org/package/2006/content-types
    • http://www.oracle.com/bne

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
72f4a6a5ae7ccee6303b8f3f83934b85b18a653d56af4fc3aadbe652bab07661		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 408441 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 6 shell/COM execution token(s). Carved artifact contains 1 eval/decoder/string-building token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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