Emotet Office (OLE) / .XLSX malware analysis — malicious · 2f7fe2784d607d57

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 5de2e5443429c1db620ca3937119cffb SHA-1: 681cc526fddad967cb8e84620421a9e8aa193c17 SHA-256: 2f7fe2784d607d57b21ae3d0dcd787a1dfb36714c25c3a6b8c07dd7fe4d3a44e

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 sample is identified as malicious by ClamAV with a specific Emotet signature. The Workbook_Open macro is configured to execute, which is a common Emotet delivery technique. The script attempts to download a second-stage payload from the reconstructed URL 'http://midnighitsilverbcraft.com/store/wBjNOUwc/BI710N4cQ6R3/' and save it as 'oue4hjld.vbs' in the programdata directory, then executes it via a batch file. The script also attempts to establish persistence by writing to the registry.

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` `90ffad26db5076950cce8d64bce1b7eadd9a388a27b6fe9a7d1c163187e3daee`	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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