Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 e5ba34d41a809d44…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 2a0a94bb7aeb4130d2f7929507916c08 SHA-1: dd80ba53cd62fbb96f2c6723af6b0278f3a600d4 SHA-256: e5ba34d41a809d444b0b9caf44c4627a959ccd84b1c33189ff5034275201f47b
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file contains VBA macros, specifically a Workbook_Open auto-execution routine, which is a common delivery mechanism for Emotet. The script uses CreateObject and references Wscript.Shell, indicating it will likely execute external commands or scripts. The DOC BODY contains obfuscated VBScript and batch commands, including a reconstructed URL string: "http://youlanda.org/eln-image/n8DPZISF/ ,http://roseveideob.net/eln-images/EjdcCoMLY8Gy/ ,http://vbaint.com/eln-images/H2pPGtE8XzEN/ ,http://framacareers.us/eln-images/U5W2IGE9m8i9hr/ ,http://niplaw.com/asolidfou nada/ ,http://roberflod.us/eln-images/DGI2YOkwc9XP/ ,http://mpmcomputing.com". This script likely downloads and executes a second-stage payload. Persistence is also suggested via a registry key: HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy.

Heuristics 7

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • 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
faf50200d5a9adeeda00cc1da1bbf8f6abf0317a1e97a58db8ae804ba12ba446		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13985 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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