Emotet Office (OLE) / .XLSX malware analysis — malicious · 7a72ff13e82b936c

MALICIOUS

Office (OLE) / .XLSX

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

MD5: dad00ffe22895469b26bcace4eed0c7b SHA-1: 91fe39d4ec42b20e4b7aa93b1cdfc2220417b501 SHA-256: 7a72ff13e82b936c24f8cd31a97a4a2bf1600d833195db084fc5db5b15130ffb

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetExcel02222-9938901-0'. The Workbook_Open VBA macro is configured to execute, and it utilizes CreateObject to interact with the system. The embedded VBA script contains obfuscated PowerShell commands that reconstruct and execute URLs to download a second-stage payload. Specifically, the script reconstructs the following URLs: 'http://store.uxdummmit.com/wp-admin/VfgBA7Z/', 'https://glowerentals.com/wp-admin/f1zezAKGTnS6I/', 'http://candise.bimteractive.org/1g94ngo/2n7wJoPuPDaenPx/', and 'http://bacchilearatoropociclos.org/'. It also creates batch and VBScript files in C:\ProgramData.

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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