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

Static analysis result for SHA-256 39044444a388b5d7…

MALICIOUS

Office (OLE) / .XLS

68.0 KB Created: 2020-09-20 21:17:44
MD5: 9f9dec335a0ad8c3cd314c695926e847 SHA-1: 0f7901078941f167b318f4fb37349503ec62b45d SHA-256: 39044444a388b5d7aa85c7ac0566225274a3f34844e42f3500b9310684eb820d
60 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. Heuristics indicate the presence of an Auto_Open macro that uses dangerous functions, specifically the RUN function, which is highly suspicious. This suggests the macro is designed to execute arbitrary commands. The embedded URL, although labeled benign, is a potential indicator of a download or command-and-control channel. The macro's intent is likely to download and execute a second-stage payload.

Heuristics 3

  • 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.
  • 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://cutt.ly/GhjWXo2 In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
0631b9e6661978f5b68195f9777df1a48513e221fdeeadb5907d0485d2de4a71
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1599 bytes