Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3ce6d311ec91aec6…

MALICIOUS

Office (OLE)

316.5 KB Created: 2020-07-10 10:41:45 Authoring application: Microsoft Excel First seen: 2020-09-07
MD5: 09963cba59074c1c53d22a88bb5e52a3 SHA-1: 715b76391f8c3fd8b4207f93abc7484f68a82e76 SHA-256: 3ce6d311ec91aec65ae44cabdc0bd900c79066ba40b825a67afa38547db56fe4
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample contains Excel 4.0 macros with an Auto_Open entry, indicating it will execute automatically when opened. It also employs a lure to enable macros, impersonating a document signing service. The presence of the Auto_Open macro and the lure strongly suggest the intent is to download and execute a second-stage payload.

Heuristics 6

  • 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.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns# In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/mm/In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 67002 bytes
SHA-256: 45b308741c7115015b059bfe82aa6653e6614b34bc0ddb2ebf5d147f1437ff1d
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, very hidden -  Sheet
' 0085     10 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  z
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0018     24 LABEL : Cell Value, String Constant - acJPiqfMH len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!EY41030 
' 0018     40 LABEL : Cell Value, String Constant - azzajvYrXuNmNYSkUqakqmyQe len=0 
' 0018     16 LABEL : Cell Value, String Constant - b len=0 
' 0018     61 LABEL : Cell Value, String Constant - bDZlzhykoPDBuNKgDbgdorHcdmwrVkEXqlaGPQOTEwEivu len=0 
' 0018     19 LABEL : Cell Value, String Constant - BFfT len=0 
' 0018     26 LABEL : Cell Value, String Constant - BFIzYngQxBV len=0 
' 0018     35 LABEL : Cell Value, String Constant - bKgQbhdoGVcdnLGjlRYr len=0 
' 0018     52 LABEL : Cell Value, String Constant - BlelQdcsvyqPeXHprMotHRmznZBXWxfwimNmx len=0 
' 0018     23 LABEL : Cell Value, String Constant - bLWbYjBP len=0 
' 0018     34 LABEL : Cell Value, String Constant - BoJzqFPxwkXxUgvctgk len=0 
' 0018     29 LABEL : Cell Value, String Constant - BOLtHggIQdFZEc len=0 
' 0018     39 LABEL : Cell Value, String Constant - BWjXJkHGhPgSWwXicurOjJBw len=0 
' 0018     25 LABEL : Cell Value, String Constant - BXtSYUfixT len=0 
' 0018     41 LABEL : Cell Value, String Constant - BxUqPHDPfuQENkfJLrMRZOuDEC len=0 
' 0018     50 LABEL : Cell Value, String Constant - CFwVydbJxSIyNXGGstUdpRlQoHSHExQNkUe len=0 
' 0018     30 LABEL : Cell Value, String Constant - cFYEbtTtFyRBXHR len=0 
' 0018     43 LABEL : Cell Value, String Constant - cguFanaNoLJlTkWazalfxuSnMEBM len=0 
' 0018     63 LABEL : Cell Value, String Constant - ChcdbgRYfvXWmceWvYDBjXriZnxgfTTuDPrLqPgsgeYqnKtF len=0 
' 0018     31 LABEL : Cell Value, String Constant - cOHOsTFUYbTrVzjf len=0 
' 0018     24 LABEL : Cell Value, String Constant - csvyqPeXH len=0 
' 0018     28 LABEL : Cell Value, String Constant - cvCKyenomrPVd len=0 
' 0018     57 LABEL : Cell Value, String Constant - CvOwUEOUQcsIPRaxsWYFLembHDDCHryGWwvMCFwVyd len=0 
' 0018     56 LABEL : Cell Value, String Constant - CWyEROwKjjLUgIcHfxXxJDVEbLVbXjzPWYhFzdfMS len=0 
' 0018     42 LABEL : Cell Value, String Constant - cXBCipIQGlghfkWcjzbaqgjazcI len=0 
' 0018     16 LABEL : Cell Value, String Constant - D len=0 
' 0018     18 LABEL : Cell Value, String Constant - DCp len=0 
' 0018     38 LABEL : Cell Value, String Constant - dDqoiBxUqPVRcfuQRbkfJYr len=0 
' 0018     17 LABEL : Cell Value, String Constant - de len=0 
' 0018     37 LABEL : Cell Value, String Constant - deoMHklSZrzpVQRPUFMTjL len=0 
' 0018     32 LABEL : Cell Value, String Constant - DGaDHVfBOBnPkjMtL len=0 
' 0018     29 LABEL : Cell Value, String Constant - DQbKJwiKgsHoGr len=0 
' 0018     18 LABEL : Cell Value, String Constant - dqp len=0 
' 0018     62 LABEL : Cell Value, String Constant - DQPfjldDSKuceybguqZmMMnwJkFjIazalfxgEnxEzMcryBK len=0 
' 0018     24 LABEL : Cell Value, String Constant - drNBKidGI len=0 
' 0018     55 LABEL : Cell Value, String Constant - DroiBxVFPVRdtuQSbygJZGMfncIEEDIslsXxjzDG len=0 
' 0018     55 LABEL : Cell Value, String Constant - dTKYiRREqRnBPwOzEdSPJbYuRpvrDHVqsCLGjzSm len=0 
' 0018     54 LABEL : Cell Value, String Constant - DztMJgQagcoFGbdmKrVkRXqyoUPPOTEwEiJuLOR len=0 
' 0018     54 LABEL : Cell Value, String Constant - eaJXwwXgsVoUrKjKVPhRnXhnjvNbjktRMprYexG len=0 
' 0018     51 LABEL : Cell Value, String Constant - EBjXsiZnxggTTuDQrLqPgsheYqnKtFLHSjkG len=0 
' 0018     19 LABEL : Cell Value, String Constant - ekEM len=0 
' 0018     39 LABEL : Cell Value, String Constant - EmoJlpEOjwjWxUSuctfjKjuo len=0 
' 0018     48 LABEL : Cell Value, String Constant - ERqqSanPjOmEeFQKcLhRciepHWdeoMHkm len=0 
' 0018     23 LABEL : Cell Value, String Constant - EzoJypEO len=0 
' 0018     51 LABEL : Cell Value, String Constant - FBNdezCLiQtJpvPXNsnnmrcVcHhTjmphGjOx len=0 
' 0018     19 LABEL : Cell Value, String Constant - FiNL len=0 
' 0018     29 LABEL : Cell Value, String Const
... (truncated)

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