Emotet Office (OLE) / .XLSX malware analysis — malicious · 3d1a3a3b87ea19a0

MALICIOUS

Office (OLE) / .XLSX

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

MD5: f82e02989997d35626cf6c651b08a583 SHA-1: 8a68466a96ec6a6a7e329aad04f332360a054c91 SHA-256: 3d1a3a3b87ea19a08f0b6b2ab2064d962b72efae9b9d0137a45271940187cd3f

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 a malicious macro-based document. The VBA script contains obfuscated commands that reconstruct and execute a VBS file from 'c:\programdata\oue4hjld.vbs' and a batch file from 'c:\programdata\bhnasleil.bat'. The script also attempts to download a payload from multiple URLs, including 'http://midnighthilivercraft.com/store/wBjNOUw/NA TE_05_22_2009/BI710N4cQA6R3/' and 'http://temporal.com/NATE_05_22_2009/BI710N4cQA6R3/', which is characteristic of Emotet's downloader functionality.

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` `bee08238e297afde2d0d4fab9b56da8dd9aa3cc387a39ca66f1c787b75d1f2fe`	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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