Emotet Office (OLE) malware analysis — malicious · a8fd2808ccfd8453

MALICIOUS

Office (OLE)

153.3 KB Created: 2020-09-15 09:11:00 Authoring application: Microsoft Office Word

MD5: 3c15cae099aa8f890a6551d1806819ce SHA-1: 3acfdb750259256bd40c6a1c2ef468ee14616677 SHA-256: a8fd2808ccfd8453ff229d0c6c0c874b154d9031fe33e519eba2be356d9790a6

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The sample contains a Document_Open macro that executes an obfuscated PowerShell command. This command reconstructs and executes a PowerShell script that appears to download and execute a second-stage payload, evidenced by the critical OLE_USERFORM_OBFUSCATED_POWERSHELL heuristic. The ClamAV detection of 'Doc.Dropper.Emotet-9761056-0' strongly suggests the Emotet family. The PowerShell command includes a reconstructed URL and a registry key for persistence.

Heuristics 8

Hidden UserForm PowerShell EncodedCommand stager critical OLE_USERFORM_OBFUSCATED_POWERSHELL

OLE document contains a UTF-16LE form/property string with an obfuscated PowerShell -EncodedCommand payload. The observed macro family reconstructs this hidden string with Split/Join or UserForm property reads and launches it through WMI/COM process creation. This is downloader malware, not an Office CVE exploit.
ClamAV: Doc.Dropper.Emotet-9761056-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Emotet-9761056-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `b4e7e6a496a33a5d51b25c403e1165bdc88602f70d8eedc62b6d635ba4d9d28a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	22614 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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