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

Static analysis result for SHA-256 1c6000afd4c0430f…

MALICIOUS

Office (OLE) / .XLS

102.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: dd21ebd8b9b098edea233d4f6fb022cf SHA-1: d2b4bac7a7af2cca60786fcf3b04e4625e1a2f31 SHA-256: 1c6000afd4c0430f80ed4bcb71179129d7c5a7553946d2c36b859c11f0be9244
80 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro that uses dangerous functions, specifically the RUN function, to execute external code. The document body presents a fake DocuSign prompt to trick the user into enabling macros. The macro is designed to download a file from 'http://gammasolutionsltd.com/nplwhk/999999.png' and execute it, likely serving as a downloader for a second-stage payload.

Heuristics 4

  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 http://gammasolutionsltd.com/nplwhk/999999.png�
    • http://gammasolutionsltd.com/nplwhk/999999.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
c32270e5fd4a15776820e2d4d6f5f4920d18d883470935419839449365a9c30d
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2081 bytes