Office (OLE) / .XLS malware analysis — malicious · 8ecebb9050ba666a

MALICIOUS

Office (OLE) / .XLS

380.5 KB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel

MD5: 863b147bcf3ed02799b40403b203b144 SHA-1: f9716272a6e770973c4b2e917b79b4c6cb707e28 SHA-256: 8ecebb9050ba666a586f0d3bc30b258f50766f3040d9967202d5c6181d697139

102 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File T1071.001 Web Protocols

The sample contains Excel 4.0 (XLM) macros with an Auto_Open entry, indicating automatic execution upon opening. The document body and extracted macro content explicitly reference URLs and commands like 'downloadFile' and 'runDLL', suggesting the script's purpose is to download and execute a second-stage payload. The presence of a macro-enable lure further supports this delivery 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://thedeformo.com/zrbLAqMKy21Y/lena.html
- https://faithfulroofingco.com/nmsY1dCNaBRO/lena.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `13ea4a1fd330f9266fa91027043baa61f334e3ac691e10ce14b7c7fee97c551c`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	8812 bytes

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