Emotet Office (OLE) / .XLSX malware analysis — malicious · 401d1b73158226e5

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 65d0b75f9efa8352691cb5decc89a767 SHA-1: 3227c454171ad2fbf0e51ae27445f326c38936e0 SHA-256: 401d1b73158226e575edb8bc3270d03ad1a74d35d5c6d7f9c19cc3375a85887d

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV heuristic and the presence of a Workbook_Open VBA macro indicate a malicious downloader. The VBA script uses CreateObject to instantiate Wscript.Shell and then executes a downloaded payload. The script reconstructs the following URLs for downloading the payload: 'http://store.uxdummmit.com/wp-admin/VfgBA7Z/', 'https://glowerntals.com/wp-admin/f1zeEAJGTS6I/', 'http://candise.bmintaropciloc.org/1g94ngo/2n7wJoPuPDaenPcX/', and 'http://b achilleratoporciclo.org/'. It also attempts to save the payload to 'c:\programdata\jledshf.bat' and 'c:\programdata\tghklsd.vbs'.

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.

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