Emotet Office (OLE) / .XLSX malware analysis — malicious · af26cb2a892223a7

MALICIOUS

Office (OLE) / .XLSX

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

MD5: c4cfe98e4dcb8247332b3e0e3c539919 SHA-1: 6d545b3f2702aa6f8b00bf27c48308e223926a08 SHA-256: af26cb2a892223a755386b1465bb675a73cc610d39a6921f036acd602bda3876

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The sample is a malicious Excel file containing VBA macros, specifically a Workbook_Open macro, which is a common technique for Emotet. The script attempts to download and execute a second-stage payload using a reconstructed URL. The presence of Wscript.Shell and the creation of a .vbs file indicate the execution of a script to further compromise the system. The reconstructed URL is: "http://youlanda.org/eln-image/n8DPZISf/ ,http://roseveidebo.net/eln-image/EjdcOMlY8Gy/ ,http://vbaint.com/eln-image/H2pPGte8XzENc/ ,https://framemakers.us/eln-images/U5W2IGE9m8i9hr/ ,http://niplaw.com/asons/JO5/ ,http://robertflolod.us/eln-images/DGI2YOkw9XPO/ ,http://mpmcomputing.com/fonts/JO5/ ,http://robertflolod.com/cegi/3f/ ,http://vocoptions.net/cegi/ifM9R5ylbVpM8hfR/ ,http://misisionny.org/fonts/JO5/ ,http://framemakers.us/eln-images/U5W2IGE9m8i9hr/ ,http://niplaw.com/asons/JO5/ ,http://robertflolod.us/eln-images/DGI2YOkw9XPO/ ,http://mpmcomputing.com/fonts/JO5/ ,http://robertflolod.com/cegi/3f/ ,http://vocoptions.net/cegi/ifM9R5ylbVpM8hfR/ ,http://misisionny.org/fonts/JO5/".

Heuristics 7

ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
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` `faf50200d5a9adeeda00cc1da1bbf8f6abf0317a1e97a58db8ae804ba12ba446`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	13985 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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