Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 48f126fef372b4d5…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 347239e13b8962fd444fa8d6e8cbc9fd SHA-1: 925b439fc65411be1e306ccab68c6ea9305305f4 SHA-256: 48f126fef372b4d5eabdc30a68cdde52d0cf52989143bdf202cd3e8ec23545cd
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample contains a Workbook_Open VBA macro that is configured to execute a VBScript payload. The VBScript payload, reconstructed from the document body, attempts to download and execute a second-stage payload from multiple URLs, including 'http://midnighsilverbirqrafter.com/store/wBjNOUw/B710N4cA6R3/' and 'http://tempra.com/NAT_05_22_2009/BI710N4cA6R3/'. The VBScript also attempts to drop a batch file named 'bhnasleil.bat' to 'c:\programdata\bhnasleil.bat'. The ClamAV detection name 'Doc.Downloader.EmotetRed02220-9938909-0' strongly suggests an Emotet family attribution.

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
7eed493c95488aef3fc48080ff7a25b4dc6795a2103b4b97ee85bf6eb169f7b9		 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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