Emotet Office (OLE) / .XLSX malware analysis — malicious · 1e955829fb12c50a

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 860f1e65c077950155e9032bc99b9756 SHA-1: 9382c69b93feedd6e0e767010282809e6f33a018 SHA-256: 1e955829fb12c50a6babb386fc59076be6f05c9f07459f68038ad2fa4b5419e9

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 critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open execution, and CreateObject calls strongly indicate a malicious document. The VBA script contains obfuscated commands that reconstruct URLs and file paths, including 'http://midnighitsilverbcrqfter.com/store/wBjNOUwBqN4cQA6R3/B710N4cQA6R3/', 'http://temp.com/NAT_E_15_22_2009/BI710N4cQA6R3/', and 'https://redington.karmart'. It also constructs paths for temporary VBS and BAT files, such as 'c:\programdata\oue4hjld.vbs' and 'c:\programdata\bhnasleil.bat', suggesting the script's intent is to download and execute a second-stage payload. 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` `ade70194f38654c68c14ad7db2c5e19447b5e64e51a171e7334fccfd1ad81e71`	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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