Malicious Office (OLE) / .XLSX — malware analysis report

Static analysis result for SHA-256 f7b73353974e0683…

MALICIOUS

Office (OLE) / .XLSX

142.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-05-31
MD5: 62c564650fbb4ed0910416f83a36ac2f SHA-1: 966f7f6817701d383edbb0ad95a328569957fd0d SHA-256: f7b73353974e0683f598f3da4bef77cd1982a2f0e5b1347e254da27ce4ea03ac
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The sample contains Excel 4.0 (XLM) macros, specifically an Auto_Open macro, which is a strong indicator of malicious intent. The document body and embedded artifacts impersonate DocuSign, a common lure to trick users into enabling macros. The XLM macros are likely designed to download and execute a second-stage payload from one of the provided URLs.

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.

FilenameKindSourceSize
xlm_macros.txt
fd395c0d5efe31bc3f4c13f428339dafef8132102e75fdb8cfce92015175af32		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2730 bytes

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