Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 9b3e529c99b1e888…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 79149298082df7a934044f5d221eceb7 SHA-1: 57310c1d1dd352e09e5d22dcbb73ab2d9052f85f SHA-256: 9b3e529c99b1e88849b71b0b9183b419b55c8e8205b7151a9233b14cde08b1be
280 Risk Score

Malware Insights

Emotet · confidence 95%

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

This XLSX file contains VBA macros that execute upon opening, indicated by the Workbook_Open heuristic. The script attempts to download and execute a payload using a batch file and VBScript. The batch file contains a heavily obfuscated command that reconstructs multiple URLs, likely for downloading a second-stage payload. The presence of 'Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0' in the ClamAV detection strongly suggests the Emotet family. The reconstructed URLs are: 'http://lbsbriefs.com/cgi/2akl8X82xEKeuhI/', 'http://howebeautiful.com/eln-images/tyj208/', 'http://lazylargomotel.com/cgi/wZrYBJ/', 'http://osak.musicaldog.com/05-set/YLBOdd/', 'https://eroltmutafawk.com/dso/S3d34UHm0Qkibn57N0G/', 'http://catower.com/cgi/iC2/', 'http://matknapp.net/Resources/OipJPXsI/'.

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.

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