Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 7985c02c486c7d28…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: f61b1495e459000eeeeeb567fa1d8dc2 SHA-1: a9d8664284f274a355226f2bc4c848be07dd1cde SHA-256: 7985c02c486c7d28ee8e42b9243c10f5b87c8f0b33bcaed4224bb8e090100dd5
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The file is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetRed02220-9938909-0'. Static analysis reveals the presence of a Workbook_Open VBA macro that uses CreateObject to execute code. The macro appears to be responsible for downloading and executing a second-stage payload from the reconstructed URL 'http://midnighitsilverbcraft.com/store/wBjNOUwc/B110N4cQ6R3/' or 'http://temp.com/NAT_05_22_2009/BI710N4cQ6R3/', and potentially saving it as 'c:\programdata\oue4hjld.vbs' and executing it via 'c:\programdata\bhnasleil.bat'.

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
ee0bd954ce82ab1acb8e13ca8114243967217d52f84ff139060663e48527ace0		 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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