Emotet Office (OLE) / .XLSX malware analysis — malicious · 2b53883aca2f7ecc

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 67b04d01df6507c557fb5fc3f446b868 SHA-1: 9c904e5f697f23b2c61141a97411071a0a3806e6 SHA-256: 2b53883aca2f7ecc8c9273d6ef3e7a8297d1a12367f955b74960a9973ca5493e

280 Risk Score

Malware Insights

Emotet · confidence 85%

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1059.003 Windows Command Shell T1059.001 PowerShell

The sample is identified as Emotet based on a ClamAV detection and the same pattern of dropping a batch file. The document body contains obfuscated commands that, when cleaned of the 'Rpce' noise, reconstruct to 'c:\programdata\jledshf.bat' and 'rundll32.exe c:\programdata\vbkwk.dll'. The batch file content further utilizes PowerShell to download and rotate through a list of C2 servers including 'https://vestaseguridad.com.ar/wp-content/7JD9gufnwGw/' and 'https://mail.reddeducacionvirtual.com.ar/wp-includes/BqJi1K/'.

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.

Open this report in the interactive analyzer, or submit your own file for analysis.