Office (OLE) / .DOC malware analysis — malicious · a1227ade9c8d3b31

MALICIOUS

Office (OLE) / .DOC

67.5 KB Created: 2022-03-07 15:30:00 Authoring application: Microsoft Office Word First seen: 2022-03-08

MD5: 80ca57917e52a4703663d959ac42276f SHA-1: a1c18ac9ad0e32afd96192a4902e2931d7cdc399 SHA-256: a1227ade9c8d3b31b4b277770e9d83a3be3d0241fab2f847312a8c6f92fc1c1b

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The Document_Open VBA macro is configured to execute. It writes a batch file to C:\Users\Public\apersonem.bat which contains commands to download an executable from https://realwall.x24hr.com/sec/Vimvpn.exe using Start-BitsTransfer and save it as C:\Users\Public\Documents\pieceboth.exe, then execute it. The macro then calls ShellExecuteW to open the batch file, initiating the payload download and execution.

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` `577a31e9389edf0c4f141a4a5a48cca2a4d023fa9a4fc9191eb80f0356093269`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1542 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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