Emotet Office (OLE) / .XLSX malware analysis — malicious · 8cc92a0d63211d74

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel

MD5: c832229fd9334a35fed725eacc9833f9 SHA-1: 9774758d4cee8625f643a77163c557f8cb017513 SHA-256: 8cc92a0d63211d74cb4e30a8f83f189d4aabc2b8e9eeb627aefa3c6f5fb1e580

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetRed02220-9938909-0', strongly suggesting the Emotet family. High-severity heuristics indicate the presence of a Workbook_Open VBA macro that uses CreateObject to execute code. The extracted VBA script contains obfuscated commands that reconstruct the URL 'http://midnighthilivercrafters.com/store/wBjNOUw/B710N4cQ6R3/' and 'http://temp.com/NAT_05_22_2009/BI710N4cQ6R3/', and also references the files 'c:\programdata\oue4hjld.vbs' and 'c:\programdata\bhnasleil.bat', indicating a downloader functionality. The script's obfuscation and reconstruction of URLs point to a second-stage payload download.

Heuristics 6

ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
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` `4b726c41f968978fef8f1f14fb2053a6780fdfcf46021597ecbcd44cd6034e35`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	52433 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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