Emotet Office (OLE) / .XLSX malware analysis — malicious · 2829234d2e7dbac1

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: 9c1eab7125b2ce0a324751d7d2cd6558 SHA-1: d6385a3879090174423abda7f925d09a3608ac52 SHA-256: 2829234d2e7dbac1d8aa820cfabfa57c42bf83ca0667f0fd6d082c45f04e7c1f

280 Risk Score

Malware Insights

Emotet · confidence 90%

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains VBA macros that execute obfuscated commands. Specifically, it uses `wscript.createobject` to run a VBScript from `c:\programdata\yhjlswle.vbs` and a batch file from `c:\programdata\ughldskbhn.bat`. The VBScript itself appears to be a downloader, attempting to fetch payloads from multiple URLs including `https://fullness-safety.com/-/P6x/` and `https://nabajyotifoundation.com/da8uc7jo/4Za/`. The presence of `CreateObject` and `Wscript.Shell` firings, along with the Workbook_Open auto-execution, strongly indicates a downloader functionality typical of Emotet.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
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` `7a075e02dc1e88807280b9b84946715e79a3c091d50391301434649c77b78ea1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12808 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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