Emotet Office (OOXML) / .XLSX malware analysis — malicious · d208382fa7e1a75d

MALICIOUS

Office (OOXML) / .XLSX

92.0 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 12.0000

MD5: 66e49c8d00b9c1c73fefafc2ed71d246 SHA-1: f326869e55c2ab6b89e2d4fc2f6a92d691d34244 SHA-256: d208382fa7e1a75d04e17912adf9aaa0a6b18f3d7b28cbb0ee3abea4ea1476d0

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.005 Visual Basic T1059.003 Windows Command and Shell

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetRed02221-9938910-0', indicating it's likely an Emotet downloader. The presence of a Workbook_Open macro and a CreateObject call strongly suggests the execution of a malicious script upon opening. The DOC BODY contains obfuscated commands that, when deobfuscated, reveal the intent to download and execute a VBScript payload from multiple URLs. The script reconstructs the following URLs: 'http://haarehoupuroducts.com/Merch2/ARSf1LICoauh1rDiRh/', 'http://holubivdebo.com/eln-images/zqxzg0YXpiWbF/', 'http://magicblog.tatomotors.com/wp-includes/7faN9/', 'http://chastonngroditski.com/eln-images/sSsC', 'http://seacoups.com/eln-images/AYvykzgg/', 'http://ericandrobbin.com/cgi/qRe8rRAG2HDNOOG1/', 'http://soantiqeus.com/cgi/9ii/', 'https://greenlawnirigationation.net/GLI_New/JRlt3mOiezo/', 'https://on-lineinventures'. It also specifies saving the payload to 'c:\programdata\yhjlswle.vbs' and executing it via 'c:\programdata\ughldskbhn.bat'.

Heuristics 5

ClamAV: Xls.Downloader.EmotetRed02221-9938910-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.EmotetRed02221-9938910-0
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `de7bcbc45ff0a77d05d9af662bacc316e71be11a980e94f6673e556a5dd9d1bc`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	12808 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `db19e4c02821666b28027b7558f3252b61f229789f75b69e4140d50710462421`	vba-project	OOXML VBA project: xl/vbaProject.bin	37888 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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