Emotet Office (OLE) / .XLS malware analysis — malicious · e57789314ac6a26d

MALICIOUS

Office (OLE) / .XLS

438.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-02-24

MD5: 6e2f80daefd4dfe051f4db7aeaa774fe SHA-1: 64dccfac375738b3dc1be44e2a8db3761a67ad95 SHA-256: e57789314ac6a26d64dad85cb1b8b7ca95ded232acc49b1925c92ef60737fcd3

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The sample is an Excel file containing a Workbook_Open macro, which is a common technique for Emotet. The macro uses CreateObject to reference 'wscript.Shell' and attempts to execute a VBScript from 'c:\programdata\etyockqw.vbs'. The script itself appears to be heavily obfuscated but contains numerous URLs that are likely used to download and execute further stages of the malware. The presence of the Workbook_Open auto-execution and the CreateObject call strongly indicate malicious intent.

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` `eb472f393cd8fb353f72f2f3a25c9b61be0d56af4f72f00216b7960eeab5801f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	11223 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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