Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 e01dbfdf75aa3d6f…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: bb955a1177986d5f0badac7966479c71 SHA-1: 26997d2cc7bb5eb0c0c094d255c21d1a3c4a76c9 SHA-256: e01dbfdf75aa3d6fe2f7936b594638a3d1c1eb82317f405d0b0f1135e574c2d6
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 cmd.exe and PowerShell. The GetObject call is also suspicious. The VBA code appears to be obfuscated, but the presence of these indicators suggests the macro is designed to download and execute a second-stage payload. The specific family is not identifiable from the provided evidence.

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
e07fdfd1de6c8198fbe1b00090b5466b0a394e649ae7ff598a9b1066160b5336		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
8e128b970b3d953f3e392abd42cf4135731caaec3ca63a684a2958baf0577b81		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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