Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 16db539f4860e592…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: e79638333be7557746b93408337e359b SHA-1: e3f6a550032c91ee302a7d7532419b693867e046 SHA-256: 16db539f4860e5929fcec8fb1c2c07a08a746316b684c7bc94d86cedef7c89b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

The OOXML document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call suggests an attempt to execute external code. The presence of these elements indicates the macro is likely designed to download and execute a second-stage payload, characteristic of a downloader malware.

Heuristics 4

  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
53ec144370492a8c3a823f099e4f5dbfb3670f4d335d69e303549e94297369df		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
902892311fa32d5673bb8931fbbf4e49c0b5c84782eb2abb5342f7dbff0a0ab6		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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