Office (OLE) / .XLS malware analysis — malicious · f7894939a617b36a

MALICIOUS

Office (OLE) / .XLS

75.0 KB Created: 2023-01-26 07:35:09 Authoring application: Microsoft Excel First seen: 2023-01-31

MD5: 12b60158f29a0aecc0e0021545f00877 SHA-1: 23f0ab813846bd01a36901fcb3d9644dbba26316 SHA-256: f7894939a617b36a04824fcd202a00304d3e19251fa27533f66becdf4ab29e16

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The VBA macro contains a critical heuristic firing for URLDownloadToFile, indicating it attempts to download a file from a remote source. The script reconstructs the URL 'http://2ht40t1p11s4:6/12/3d6op66ler90to8ol1.c4o0m4' and uses ShellExecute to run 'rundll32.exe' with the downloaded file, likely to execute a second-stage payload. The Environ() calls suggest it may attempt to determine a save location within the user's documents folder.

Heuristics 5

Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD

URLDownloadToFile in VBA
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `fcf4ee92d30d1db5bfff8ae44b772237476df5852be01c11dea9395d4b53551d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1780 bytes

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