Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 75605e571fc5b78c…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 6c01f2030f39a5638c4a74d91eb37d71 SHA-1: 62dd52385805f1635becb8182ddc22661dee14eb SHA-256: 75605e571fc5b78cb26cb687ac703b313ea9a1e01d7799c990a3fd453cd61123
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file contains VBA macros, specifically a Workbook_Open macro, which is a common technique for Emotet. The macro utilizes CreateObject to execute Windows Script Host and attempts to download and execute a payload from multiple URLs. The reconstructed URL is "http://youlanda.org/eln-images/n8DPZISF/l,http://rosevecbideo.net/eln-images/EjdcOMlY8Gy/,http://vbaint.com/eln-images/H2pPgtE8XzENc/,http://framemaker.us/eln-images/U5W2IGE9m8i9hr/,http://niplaw.com/asons/JO5/,http://roberflod.us/eln-images/DGI2YOksC9XP/,http://mpmcomputing.com/fonts/JO5/". Additionally, the script attempts to establish persistence by writing to the registry key HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy.

Heuristics 6

  • 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.
  • 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

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