Emotet Office (OLE) / .XLS malware analysis — malicious · 7e2a1c312c5589da

MALICIOUS

Office (OLE) / .XLS

438.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-02-24

MD5: 7fdac02515108681629b69403457e570 SHA-1: d7a39ff397301beb1134fbca18f8452f7667347f SHA-256: 7e2a1c312c5589dab6c35eb0cf3097e8b7fca1d3dc73f0866d38ffbcb368a321

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is an Excel document containing a Workbook_Open macro that uses CreateObject to instantiate a Windows Script Host shell. This shell is then used to execute a VBScript file located at 'c:\programdata\etyockqw.vbs'. The VBScript appears to be heavily obfuscated but contains numerous URLs that are likely used to download and execute a second-stage payload. The ClamAV detection name 'Doc.Downloader.EmotetExcel02222-9938901-0' strongly suggests an Emotet family infection.

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` `eb472f393cd8fb353f72f2f3a25c9b61be0d56af4f72f00216b7960eeab5801f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	11223 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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