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

Static analysis result for SHA-256 743107be574a6c85…

MALICIOUS

Office (OLE) / .TMP

128.5 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel
MD5: c95daf4b9b6e60b1471fdcdc14b10515 SHA-1: fd69a66c0172ea8fb41c66060dd727053e2206d9 SHA-256: 743107be574a6c85144123932b06e5e0c5316b22d38d11f39bce47887122123e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The sample exhibits high-confidence heuristic firings related to CreateProcess, LoadLibrary, and GetProcAddress APIs, indicating an attempt to execute external code or load malicious libraries. The OLE slack anomaly suggests potential obfuscation or padding within the document structure. While no specific malicious URLs or scripts were extracted, the API calls strongly suggest the file is a downloader or dropper for a second-stage payload.

Heuristics 5

  • Reference to CreateProcess API high SC_STR_CREATEPROCESS
    Reference to CreateProcess API
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 131,584 bytes but its declared streams total only 21,308 bytes — 110,276 bytes (84%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • 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 http://schemas.microsoft.com/office/2006/metadata/contentType
    • http://schemas.microsoft.com/office/2006/metadata/properties/metaAttributes
    • http://schemas.microsoft.com/office/2006/metadata/properties
    • http://www.w3.org/2001/XMLSchema
    • http://schemas.microsoft.com/sharepoint/v3
    • http://schemas.microsoft.com/office/2006/documentManagement/types
    • http://schemas.openxmlformats.org/package/2006/metadata/core-properties
    • http://www.w3.org/2001/XMLSchema-instance
    • http://purl.org/dc/elements/1.1/
    • http://purl.org/dc/terms/
    • http://schemas.microsoft.com/office/internal/2005/internalDocumentation
    • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dc.xsd
    • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dcterms.xsd
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml
    • http://schemas.microsoft.com/sharepoint/v3/contenttype/forms
    • http://schemas.microsoft.com/office/2006/metadata/longProperties

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