Emotet Office (OLE) / .XLSX malware analysis — malicious · 5444d051e1ebffe3

MALICIOUS

Office (OLE) / .XLSX

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

MD5: f0dd19773e282206a8b39f5180f07268 SHA-1: 3f868d4913e2d63b48cbf4ce5c8199dc38ce3571 SHA-256: 5444d051e1ebffe3f583161a2f00fefb1c4db27d1d280ca228d9d62dc0efe29c

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, including Workbook_Open and CreateObject calls, strongly indicate malicious intent. The VBA script attempts to download and execute a second-stage payload from multiple URLs, including 'http://midnighitsilverbcraft.com/store/wBjNOUw/B110N4cA6R3/' and 'http://temp.com/NAT_05_22_2009/BI710N4cA6R3/', and saves it as 'c:\programdata\oue4hjld.vbs'. The script also constructs a command to execute this downloaded file, likely establishing a foothold on the system.

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` `149ed3ef72187236be5b300fc798cbedf3bad829e2768921e250f1f09d0d5d7c`	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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