Emotet Office (OOXML) / .XLSM malware analysis — malicious · 37269aa8dc321172

MALICIOUS

Office (OOXML) / .XLSM

115.1 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 12.0000

MD5: d0364603a4c5b580db1e24250008ef7f SHA-1: ebcc75bd4f19f9db3f4007f5389581b3edbfa7fe SHA-256: 37269aa8dc32117287c63a5f7e627bc7f629e827f86aa9fb35aaa0458ca04f5f

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is an XLSM document containing VBA macros, specifically a Workbook_Open macro, which is a common delivery mechanism for Emotet. The script attempts to create a Wscript.Shell object and execute batch and VBScript files. The reconstructed URL "http://sumedahoonlin.com/wp-content/HyzNXJ30XQEVcBRH/ , http://divachintextile.com/wp-incledes/WHhWRKs8KvNzN Fm6/ , http://hotelanalmalaabl.com/1520/bUdhEPdf/ , http://shwenantawwin.com/copma/XTnZii02vfg" indicates the script's intent to download and execute a second-stage payload. The ClamAV detection further confirms its malicious nature.

Heuristics 5

ClamAV: Xls.Downloader.EmotetExcel02223-9938902-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.EmotetExcel02223-9938902-0
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `df1eb14c222394595c0518b49eec2b55ed9573146c5f1717dedceddd2e199a2b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	12041 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `feeba9931fcfc6ea0c188dc492a1f7c4e5bd640c075ebc37359373cc7aec5ca3`	vba-project	OOXML VBA project: xl/vbaProject.bin	42496 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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