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

Static analysis result for SHA-256 30c4912eee411bd5…

MALICIOUS

Office (OLE) / .XLS

373.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 92cc0828ed09f671333443c1263d61ba SHA-1: f8321b78493fc4e0d1c3a6d5b99dc301147c9133 SHA-256: 30c4912eee411bd54cff61a74ce444feaae0332bf5947c5ef369975130a7cd26
160 Risk Score

Malware Insights

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

The file is an Excel 4.0 macro-enabled spreadsheet containing an Auto_Open macro, which is a known technique for executing malicious code upon opening. The macro uses dangerous API functions and includes a lure to enable macros, indicating it's designed to bypass security measures. The embedded URLs likely serve as download locations for a second-stage payload, such as a DLL, as suggested by the presence of 'DllRegisterServer' and 'load' in the extracted text.

Heuristics 5

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • XLM Auto_Open with dangerous formula APIs critical 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 https://allproac.com/u8AwHMG0OM/alex.html
    • https://karnafulimarine.com/lmjhxNSMbf/alex.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
7b20680a5c8f61ed44dce4de0580631b9188f0dd2fb85ee91819a05bfb80a422		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 5292 bytes

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