Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 15b9ed4f53891434…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: fda6c74e7af7e0cc97162e45b42c207e SHA-1: 58028a0b90f62d65b14508958b8977670399b0bd SHA-256: 15b9ed4f53891434aa211b87f99f17c5882c7ed51e80946ca29f61b61c65c03b
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample is identified as malicious by ClamAV with a signature indicating it is an Emotet downloader. The presence of a Workbook_Open VBA macro, along with heuristics for Wscript.Shell and CreateObject, strongly suggests the execution of a malicious script. The script attempts to download and execute a payload from multiple URLs, including reconstructed URLs like 'http://youlandda.org/eln-imageges/n8DPZISf/', and uses Wscript.Shell to achieve this. The embedded batch command also contains obfuscated PowerShell commands for downloading and executing further stages.

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

Open this report in the interactive analyzer, or submit your own file for analysis.