Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 7d1720fd69dfdd61…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 951840966927979e8b341ae54ce2cb71 SHA-1: 2dcbfa847857b40588b3d8df674132ea0d560379 SHA-256: 7d1720fd69dfdd61eabf0c7225b02c4cabf01c5d694b807cd82556fa73aa679a
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 is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetRed02220-9938909-0'. The Workbook_Open VBA macro is configured to execute automatically, which is a common Emotet delivery technique. The script attempts to download and execute a second-stage payload from multiple URLs, including 'http://midnighstilvercrafters.com/store/wBjNOUwc/BI710N4cA6R3/', 'http://temp.com/NAT_05_22_2009/BI710N4cA6R3/', and 'https://redington.karmart'. It also writes batch and VBScript files to disk: 'c:\programdata\oue4hjld.vbs' and '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
f92ab5bda031e0a9c6683464ee957eb506b3a46da2ada7cf935e7b2738ccd463		 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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