Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 98f69a26924326d9…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 5694eeb1d51c0b6e059f9db050f47474 SHA-1: a24e5d1b03743a02673265060a0d3c89b58eaf0d SHA-256: 98f69a26924326d9f334328b531d10ef9bacc80582bb3f66b96f154e049fd6e2
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains a Workbook_Open VBA macro that executes a second-stage payload. The macro uses CreateObject to launch cmd.exe and execute a batch file, which in turn is likely to download and execute a VBScript payload from the reconstructed URL 'http://midnighthilivercrafters.com/store/wBjNOUw/B710N4cQA6R3/'. The ClamAV detection name 'Doc.Downloader.EmotetRed02220-9938909-0' strongly suggests the Emotet family.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
  • 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
83cca7bffbd1277546ecbc8dfb7b2846d7345b295384689910fdd8eb6c8df986		 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.

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