Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 bc4d7d6ea8f4924e…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 28746ce2c964bdadbe1d8fe4d14838e5 SHA-1: c144cdae8ef653900532273858809b59e1c396dd SHA-256: bc4d7d6ea8f4924eb07030f55e378de3bf26d1bafed9b0beb6d5eb7444d9b117
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The OOXML document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call further suggests an attempt to execute external code. The presence of these elements indicates a malicious document likely intended to download and execute a secondary payload, characteristic of a phishing attachment.

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
a6c350523dcb735897f7fdbc570406660f099e70e9a16f66de05d3bd4c5babed		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
02473d117b4089b189a9caba40a40ab0a5ccbc95beb55886d0f47c236b4dd09a		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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