Emotet Office (OLE) / .XLSX malware analysis — malicious · 3e08c9a12054bd06

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel

MD5: 81dcdb863989269abdcd1351f5ddf525 SHA-1: 5850975910b88e25976dd4cdf106c4302e0f6bb6 SHA-256: 3e08c9a12054bd06a1c0058e1a192b048538ba3a44ddc15d213dbc5f14a86c15

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, including Workbook_Open and CreateObject calls, strongly indicate malicious intent. The VBA script contains obfuscated commands that reconstruct the following URLs for downloading a second-stage payload: 'http://midnighthilsilvercraft.com/store/wBjNOUwc/BI710N4cQA6R3/', 'http://temporal.com/NAT_E_05_22_2009/BI710N4cQA6R3/', and 'https://redington.karmart'. It also attempts to drop and execute a VBS file from 'c:\programdata\oue4hjld.vbs' and a BAT file from 'c:\programdata\bhnasleil.bat'. The presence of these elements points to a downloader functionality, characteristic of the Emotet family.

Heuristics 6

ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
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` `531abd48d407993eafcf3e2c4e33aec6bd177b16acebe9eb64f678b57358eee6`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	52433 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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