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

Static analysis result for SHA-256 7327bb5955791501…

MALICIOUS

Office (OLE) / .XLS

367.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b2baeedd26e6bc7121ca0d1620f54a95 SHA-1: be3096882193efcea3ec6eeee8e5235ddf5f8d99 SHA-256: 7327bb595579150172f3f2cb78a76a531467f3597f82f6c23cba63188ffd00ba
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The sample is an Excel file containing Excel 4.0 (XLM) macros, specifically an Auto_Open macro, which is a known technique for executing malicious code upon opening. The document body and extracted macros indicate an attempt to lure the user into enabling macros, which would then trigger the execution of the XLM macros. These macros are designed to download and execute a second-stage payload from one of the two provided URLs.

Heuristics 4

  • 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.
  • 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://silvertoncc.com/ys1Btp80hx/th.html
    • https://christleadersworld.com/1TaIPHnbwbNV/th.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
740337535414e50f998f7a71055f9de0e2208abc42faca490883ba1d9c48deb1
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8349 bytes