Emotet Office (OLE) / .XLSX malware analysis — malicious · f0f6e0f8f7e2d076

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 1fc9b1be9e3b27ec5b1a8675b6a51e4d SHA-1: 6d7ebb8c0950a671396d9642292e2b30409cc34d SHA-256: f0f6e0f8f7e2d076f38f5e1b70d355128f46aefb385b07741ca6949caa1ab8b9

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is identified as malicious by ClamAV and exhibits high-severity heuristic firings related to VBA macros and Wscript.Shell usage. The Workbook_Open macro is designed to execute obfuscated commands, including the creation and execution of a batch file located at 'c:\programdata\jledshf.bat'. This batch file contains further obfuscated PowerShell commands that attempt to download and execute payloads from multiple URLs. The presence of Wscript.Shell and the execution of a batch file strongly indicate a downloader or initial access mechanism.

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` `006c4f4d54d1c9bb906763adb0bd849cdbbe9d88f3fa78ad2d18ef6987f96c37`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8906 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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