Emotet Office (OLE) / .XLSX malware analysis — malicious · 9e71e53b78fb1c2b

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 0d56f12b111b03f4fafc8e00df0b816b SHA-1: 2bccefdea35f071b5d741795c62c5c2862b23283 SHA-256: 9e71e53b78fb1c2b93779042569f0cd73ffea26d93a094607c0c60b1ea36bcba

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

The sample contains a Workbook_Open VBA macro that executes a batch script. This batch script is obfuscated but appears to download and execute a second-stage payload from multiple URLs. The ClamAV signature 'Doc.Downloader.EmotetExcel02226-9938630-0' and the presence of VBA auto-execution with CreateObject point to the Emotet family. The script attempts to download payloads from the following URLs: 'http://actividades.laforetlanguges.com/wp-admin/BlkdOKDXL/', 'http://sbcopylive.com.br/rjuv/w/BlkdOKDXL/', 'https://trasix.com/wp-admin/y5Aa1jt0Sp2Qk/', and 'https://www.parkingons.co.in/abc/Y6Y0fTbUEg6/'. It also creates a batch file at 'c:\programdata\jledshf.bat'.

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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