Emotet Office (OLE) / .DOC malware analysis — malicious · 522f0758b2eac46d

MALICIOUS

Office (OLE) / .DOC

538.5 KB Created: 2021-12-03 17:38:00 Authoring application: Microsoft Office Word

MD5: 1b4787fe6982c2147f03b03a48a8da72 SHA-1: 51f8337cf0f4352d3b78bbfbd262ddf5107afc4a SHA-256: 522f0758b2eac46d2282fbd3ce0befb1041e6cff81a43f07e343166db4ab0934

300 Risk Score

Malware Insights

Emotet · confidence 90%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1083 File and Directory Discovery

The sample is a malicious Microsoft Word document containing VBA macros. The Auto_Close macro is triggered upon document closure, which attempts to write obfuscated data to 'C:\Users\Public\Documents\1.xml' using a custom hex2ascii function. This file is then likely executed, indicating a downloader pattern. The ClamAV detection name 'Doc.Downloader.EmotetRed022210-9938643-0' strongly suggests the Emotet family.

Heuristics 8

ClamAV: Doc.Downloader.EmotetRed022210-9938643-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed022210-9938643-0
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject 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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `6ea3b521d999e3a19fabd0436929675e3a529b37d0652ddadee1598115f00a24`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	37248 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).

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