Emotet Office (OLE) / .XLSX malware analysis — malicious · b173229508b830db

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 3506e3a98b59d2cedad72e206dda63b4 SHA-1: 1f58111ad1d3070cb7c2e0ac29bb90684ef7f90f SHA-256: b173229508b830db466cd006e67f62027e9c7c1ee862e03c820ef323ce2b9ed4

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open, and CreateObject indicate a malicious document. The Workbook_Open macro is designed to execute a batch file located at 'c:\programdata\jledshf.bat' and then download a second-stage payload from a reconstructed URL: 'http://monequoutal.ja.deals/assets/jcWxvUUS7VhWxJ/, http://vestaeguridab.com.ar/wp-conte/7JD9ugfnwG/, https://mail.rededucacionvirtual.com/wp-incldes/BqJi1K/, http://veluxcucumberapi.oribitalwaves.it/assets/W9KfK8'. This behavior is characteristic of Emotet downloaders.

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` `c49f2df77c50e10269216d97c3efdf7c32f9f18ba5d8fd42a9b144f48e100040`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5709 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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