Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 ad0398e3b0eb5884…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: a97dbb4f9870febf38f27468f4db764e SHA-1: 0355f2a86c9cd91ee5444bf1b3062d02d5496a22 SHA-256: ad0398e3b0eb588449c1f446a80836ca6f29af6b11326577e2d1db736de7b053
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 is a macro-enabled Excel file that triggers a Workbook_Open event. This event executes VBA code which uses CreateObject to download and execute a VBScript payload from a hardcoded URL. The script also attempts to create a batch file. The ClamAV detection and the presence of VBA auto-execution with execution tokens strongly indicate Emotet activity. The reconstructed URL 'http://midnighitsilvercraft.com/store/wBjNOUw/NAT_05_22_2009/BI710N4cQA6R3/' is a key indicator for the download of the next stage.

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
849248cafad3f2ead88d91b8058d8c162ea7b3cd08312719d17e5d6757fda8ba		 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.