Emotet Office (OLE) / .XLSX malware analysis — malicious · 8e53e1d97dfd0495

MALICIOUS

Office (OLE) / .XLSX

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

MD5: e13b2ef7bf7e5925a57c2e35e1969714 SHA-1: bb1dbac45dbda6243626285a12715a37b18eeed6 SHA-256: 8e53e1d97dfd0495c12e5c92576fdab42f77e68b948a9ad812dd295742f581e5

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is a macro-enabled Excel file detected as malicious by ClamAV, specifically identified as an Emotet downloader. The Workbook_Open macro executes VBA code that utilizes CreateObject to likely download and execute a second-stage payload. The script reconstructs the following URLs for payload retrieval: 'http://midnighthsilvercrafters.com/store/wBjNOUwc/B170N4cQ6R3/', 'http://tempra.com/NAT_E_05_22_2009/BI710N4cQ6R3/', and 'https://redington.karmart'. It also drops two files, 'c:\programdata\oue4hjld.vbs' and 'c:\programdata\bhnasleil.bat', which are likely part of the infection chain.

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` `a495841a0761edbef2d74f056f9be38054bcd09fad20a2b40786fa554a2e5038`	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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