Office (OLE) / .XLSX malware analysis — malicious · efdc94e9b627fa76

MALICIOUS

Office (OLE) / .XLSX

55.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: df100c2a6d13f5d413eed98345681491 SHA-1: 5054c2793f027a8b3c3a7eb5d21f7ae1b14035f4 SHA-256: efdc94e9b627fa760c88d61ce6ec8ba0388224938725c37a33b5533f33a599fb

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample contains Excel 4.0 (XLM) macros, including an Auto_Open macro that uses dangerous functions like RUN. It also references the ShellExecute and URLDownloadToFile APIs, indicating it attempts to download and execute a file. The document body and embedded URL explicitly point to 'http://194.36.189.195/axcypr.exe' as the payload. The presence of a macro-enable lure further supports the malicious intent.

Heuristics 6

Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
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.
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 http://194.36.189.195/axcypr.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `530ed22163cf661175900f6b9ae4930d8f4474e067e2d747dee138ae62b1416e`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	7308 bytes

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