Emotet Office (OLE) / .XLSX malware analysis — malicious · ae81681dc53af7e7

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 9d5f6af462c3f9273ad0064c9b0faa73 SHA-1: 5926ae6f904d25bbe4d818a5690dfa4a41839e3d SHA-256: ae81681dc53af7e74db8054218a6a4a7ffce1ad71cce2dfe220debc7e5438ac8

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 indicate a malicious document. The VBA script contains obfuscated commands that reconstruct the following URLs: 'http://midnighitsilvercraft.com/store/wBjNOUwc/B110N4cA6R3/', 'http://temp.com/NAT_05_22_2009/BI710N4cA6R3/', and 'https://redington.karmart'. These URLs are used to download and execute a second-stage payload, likely a VBScript file named 'oue4hjld.vbs' and a batch file named 'bhnasleil.bat', from the 'c:\programdata\' directory. The script also attempts to establish persistence.

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` `514412f3717dd35d5dd4769efcf4dcba5b52b543da4e7ee90d2cae3eb62f45cc`	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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