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

Static analysis result for SHA-256 c0d59a4c89920e7c…

MALICIOUS

Office (OLE) / .XLS

426.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 6a1420ce27c0ea3493c71927db53c62b SHA-1: 3b0aa45b328db57bcf8d190e7423eb14da78e5b7 SHA-256: c0d59a4c89920e7c7021de3bef41f08f46c613f354578ffdc8767ddb0460c7f8
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.004 Unix Shell T1204.002 Malicious File T1036 Masquerading T1071.001 Web Protocols

The sample is an Excel 4.0 (XLM) macro sheet document that contains VBA macros. It uses an enable-lure technique to trick the user into enabling macros. The presence of ShellExecute and URLDownloadToFile API calls, along with an embedded URL, suggests that the macro is intended to download and execute a second-stage payload. The specific URL https://www.notamuzikaletleri.com/19.gif is suspicious and likely serves as the download source.

Heuristics 8

  • Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD
    Reference to URLDownloadToFile API
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • 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.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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 https://www.notamuzikaletleri.com/19.gif�
    • https://www.notamuzikaletleri.com/19.gif
    • 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/ResourceRef#
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
e26e570691e37538cb153a294d4bd7899ebc79f39ec63fd34cf1eae37efa26f6		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 9455 bytes
macros.bas
8c21c322bb8b23e7dbfa4da0de1c41676162b0810e96582d1365413c12adc768		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 977 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.