Emotet Office (OLE) / .XLS malware analysis — malicious · cc1fd1cee9bde142

MALICIOUS

Office (OLE) / .XLS

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

MD5: 3e607d02ea065ee24d9aa15ea14e893c SHA-1: ca8c43457ce682b4b878df7485681eb5000dc92a SHA-256: cc1fd1cee9bde1429fcc34eabaff40f847f26176101d4b1bb6a9b8ec49aeff53

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 T1059.005 Visual Basic

The Workbook_Open macro executes a series of commands via Wscript.Shell. The primary command reconstructs to 'powershell -e <base64_encoded_string>' which is indicative of a downloader. The macro also attempts to create a batch file at 'c:\programdata\jledshf.bat' and execute it. The base64 encoded string within the PowerShell command decodes to multiple URLs, suggesting a multi-stage download and execution process. The ClamAV detection and heuristic firings strongly indicate Emotet family activity.

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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