Office (OLE) / .DOC malware analysis — malicious · c19abcbfc6672430

MALICIOUS

Office (OLE) / .DOC

74.0 KB Created: 2022-02-22 11:42:00 Authoring application: Microsoft Office Word First seen: 2022-02-24

MD5: b63b2ca5bd6cb257918779837817c262 SHA-1: 2114393c19626e1c9b12d9932a3a9a55a47c5504 SHA-256: c19abcbfc667243029655f8bfc7be87498c594333cea7b98558f920c8559622c

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The VBA macro within the document is configured to execute automatically upon opening. It constructs a PowerShell command that downloads a file from 'https://secur54.ga/v/Unosvpn.exe' and saves it as 'C:\Users\Public\Documents\largevote.exe', then executes the downloaded file. The ShellExecuteW API is used to open the file containing the command, facilitating the execution of the malicious payload.

Heuristics 5

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
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` `6b8d3cf6600b90d6d54f91a79585f1791c3535c4f1385f0ac0ccdb8fbea71230`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1556 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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