Office (OLE) / .XLS malware analysis — malicious · 3132cdfb9b2e643a

MALICIOUS

Office (OLE) / .XLS

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

MD5: b45fc9a9f0a445f61b365fd5b68b3244 SHA-1: 1367dae0f4af4a5766bc35f6dc7367c326a5265e SHA-256: 3132cdfb9b2e643ac4e4b51e5d42fe96ddf65cd00e18ca96a0d081cdc5e6de8f

208 Risk Score

Malware Insights

MITRE ATT&CK

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

The VBA macro contains critical heuristics for URLDownloadToFile and Shell() calls, indicating it's designed to download and execute a payload. The script reconstructs the URL "http://2ht40t1p11s4:6/12/3d6op66ler90to8ol1.c4o0m4" and uses rundll32.exe to execute it. This strongly suggests a downloader or droppper functionality.

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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