Office (OLE) malware analysis — malicious · 69d30f56580f95d1

MALICIOUS

Office (OLE)

349.0 KB Created: 2000-11-16 06:31:35 Authoring application: Microsoft Excel

MD5: 04c60f0a61d59e5c0c0cb1a0013fba3e SHA-1: 644e356a2709f74395c4ada42d4f36f4878735ac SHA-256: 69d30f56580f95d1b33628e73bb9bbcae1631271ef05554873067805c0e4ea15

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1203 Exploitation for Client Execution

The file is an Excel document containing Excel 4.0 (XLM) macros, specifically an Auto_Open entry, which is a known method for executing malicious code upon opening. The presence of Windows Script Host references further suggests the execution of external scripts or commands. While no specific URLs or payloads were directly extracted, the configuration strongly indicates a downloader or initial execution stage for a more complex attack.

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.
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
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.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `78842ca5217c0fd74aad14a1625877e099d1c1ad6629bb6dede8e4a16fd6c7e8`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	20317 bytes
`macros.bas` `c1d90dd1bc2c1cebc46684b9ade2b5d1502584e615fff9b78c7cf143eb6aa943`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	306 bytes

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