Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 e0a804913850f4b5…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: cda845b05433b5563b15c609f3301d9c SHA-1: d3ab7664c0823db96c8038f9a4a2deedeca3ea3e SHA-256: e0a804913850f4b58509ae7285ce4fbe523b3b7dbfeb8a12d2a03a6447198ebb
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open execution, and CreateObject calls strongly indicate a malicious macro-based document. The VBA script contains obfuscated commands that reconstruct URLs and file paths, including 'http://midnighitsilverbcraft.com/store/wBjNOUw/B110N4cA6R3/' and 'c:\programdata\oue4hjld.vbs', which are likely used to download and execute a second-stage payload. The presence of Emotet-related indicators in the ClamAV signature further supports this 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
596a0ba777e9949d4c93bac86527a05ac60661c42cc8eb2c1a651eac6d24209e		 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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