Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 a515241078fba861…

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 5fedc1dd15f6c404cc3e22f15cc32df8 SHA-1: 156313f889a53e505e8d420c9557bb52075bdf15 SHA-256: a515241078fba861d72590da24b0249e6d2a5cc6c5c76614e8715f58ce30ff48
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1059.005 Visual Basic

The file contains VBA macros that trigger on workbook open, indicative of Emotet. The macro uses Wscript.Shell to execute commands. Specifically, it attempts to run a VBS file from 'c:\programdata\yhjlswle.vbs' and a batch file from 'c:\programdata\ughldskbhn.bat'. The reconstructed command line for the batch file execution is 'c:\programdata\ughldskbhn.bat', and the VBS file is executed via 'wscript.exe c:\programdata\yhjlswle.vbs'. The script also attempts to download payloads from multiple URLs, including 'https://nabajyotifoundation.com/da8uc7jo/4Za/'.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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
7a075e02dc1e88807280b9b84946715e79a3c091d50391301434649c77b78ea1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12808 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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