Office (OLE) / .XLS malware analysis — malicious · ddc07e798b52af9e

MALICIOUS

Office (OLE) / .XLS

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

MD5: fa97a4c92829859c6451e0ecdba01677 SHA-1: 60531f215101681b6946e2ff65e7c480644ac701 SHA-256: ddc07e798b52af9e1cd2c8fba015dfc2250c9accc77dc1fabaf3bbde1ace2feb

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The sample is an Excel 4.0 macro-enabled spreadsheet that impersonates DocuSign to lure users into enabling macros. The presence of an Auto_Open macro indicates that malicious code will execute upon opening. The embedded URLs are likely used to download and execute a second-stage payload. The XLM macros are too truncated to fully determine their exact function, but the overall pattern suggests a downloader.

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
Document signing service impersonation lure medium SE_DOCUSIGN_LURE

Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `059bb80af964b5ab11db7d0f254511ba534214da6768358287d8a5a2de56baf4`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	4507 bytes

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