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

Static analysis result for SHA-256 c5cdb8feb6a5936e…

MALICIOUS

Office (OLE) / .XLS

367.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 0d7449251810cc34ca6550aa02a28532 SHA-1: c21795297d2a4017a0f050fcec15d6a09783c342 SHA-256: c5cdb8feb6a5936ea518e16f75e61b6bd4ac7e55673c4dd09d4ba310b0032248
102 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro, indicating it will execute automatically upon opening. The presence of an 'enable lure' heuristic suggests the document prompts the user to enable macros. The embedded URLs likely serve as download locations for a second-stage payload. No scripts were extracted, but the XLM macro sheet itself is the primary execution mechanism.

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 — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
    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

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