Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 43e3ea2f32cadeb4…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 4f313459810a2f25dd41b0da4a8e23c3 SHA-1: 25cb5eab375d75cec2948b200180e1dfa4ee1ff2 SHA-256: 43e3ea2f32cadeb46cfaec31146eb57a200080c05cab6553a6dd48a9b8f0f39b
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The file is an Excel spreadsheet containing VBA macros, specifically a Workbook_Open macro that executes a CreateObject call. This is a common delivery mechanism for Emotet. The script attempts to download and execute a payload from a hardcoded URL, reconstructing the URL as 'http://midnighsilvercrafters.com/store/wBjNOUwc/BI710N4cQA6R3/'. It also creates batch and VBScript files in the ProgramData directory, likely for further execution or persistence. The ClamAV detection further confirms its malicious nature.

Heuristics 6

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ba6a50048ad04a391f775697dd7247a3f28db09998183ee96ce8da208962b656		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 52433 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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