Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 1ecd682d9017cbcd…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 1973910cf3d0a54dc0005b806af77904 SHA-1: ed12e879c10a85579fabbc056cf5da0dc32569af SHA-256: 1ecd682d9017cbcd2e83fe3dcb59a15278ea48e719f1b331d34f802290b809ba
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1105 Ingress Tool Transfer

The file contains VBA macros, including a Workbook_Open auto-execution routine, which is a common delivery mechanism for Emotet. The script attempts to download and execute payloads from multiple URLs, including 'http://midnighsilevercraftes.com/store/wBjNOUwc/BI710N4cQA6R3/' and 'http://temp.com/NAT_05_22_2009/BI710N4cQA6R3/', and also attempts to drop '.vbs' and '.bat' files to 'c:\programdata\'. The presence of these elements and the ClamAV detection strongly indicate a downloader functionality associated with 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
9b9b91736a6d3edc722eaf4b2c855b0df97e9eb63bbde6e0afdfde73174f8a3c		 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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