Emotet Office (OLE) / .XLSX malware analysis — malicious · 881fe02c539ce8d1

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 7de818fb2e6a8596ae6ab41745b9a1a3 SHA-1: f8a64d7acba54dc38e6251f5e215b4ce5fe9720b SHA-256: 881fe02c539ce8d1b26542de0b379e33f01c606e28d3ff49a2c48c22cdd9bebc

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic

The sample is identified as malicious by ClamAV with a specific Emotet signature. The VBA macros contain obfuscated code that reconstructs URLs and commands. Specifically, it constructs the command 'cmd /c start /B /WAIT %ertEWRt4%%cvFHDErte75s%%oifYdFGhse34sd%%wreDgdSdytDFf%%jDFtHxdrgszegh%%AegFhtXfg4f%%BXdgrtysews34yu%'. The script also reconstructs the following URLs: 'http://store.uxdummit.com/wp-admin/VfbBSRQA7Z/', 'https://glorenental.com/wp-admin/f1zezAKGTnS6I/', 'http://candise.biminteractiv.org/1g94ngo/2n7wJoPuPDaX/', and 'http://bachilleatoropociclos.org/'. These reconstructed elements suggest the script's intent is to download and execute a second-stage payload.

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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