Emotet Office (OLE) / .XLSX malware analysis — malicious · 4c2f22d28a1224d1

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 4fc522d4a7f42aa9cec8a50db2e3fcda SHA-1: a19b142ec9b97eb54ec510a2e69acdcb144f5c1f SHA-256: 4c2f22d28a1224d152447f9affeab1d40a7465df2d0307ad9067d43f2938cf5b

320 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment T1059.005 Visual Basic

The file is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetExcel02226-9938630-0'. The Workbook_Open macro heuristic indicates that the macro executes automatically when the workbook is opened. The presence of 'SC_STR_POWERSHELL' and 'SC_STR_WSCRIPT' heuristics, along with the VBA code referencing 'CreateObject' and 'Wscript.Shell', strongly suggests the execution of a PowerShell command. The reconstructed URL 'http://afieeti.com/b/MzAJFBjbWhV/https://sagepilatesonline.com/y/jytar/dl/e,http://sagepilatesonline.com/y/jytar/dl/e,http://canyonclick.su/tour3d/UFZLYtHK7KA/,https://msnews24.in/wp-content/v2js/,http://bet-on.by/cgi-bin/Ram4y/,https://ukrbaget.com.ua/esoph_app/IuCMPhlcWS8P7ZuaQ/,http://qmax-vision.kz:80/basket/Z/,https://tochkareniya.com/yandey_kasa/5rNTK1bq9a7/,https://hemat20.com/wp-incluedes/d6L9aGcU0ELA9c/,https://izogard.com/b/TU/,http://sep.dfwsolar.club/hzh3v/kbCiESRW5h5X/' is likely used to download a second-stage payload. The script also attempts to save a file to 'c:\programdata\' and execute it via 'rundll30' located in 'c:\windows\syswow64\'.

Heuristics 8

ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
Reference to PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
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` `2371f091b169c7918c945b8974b3f60437212f84d1a9d429701826689481f8d8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6376 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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