Office (OOXML) malware analysis — malicious · b8a371692938146d

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300

MD5: 26c1e7e4cc82fb91af2d1e4fff3b011f SHA-1: fa7f96c20f211413c502d8f858559e65d9072e8f SHA-256: b8a371692938146d04f7d9e4146dab9afecf9b35a3560c7c820ec264873fd153

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The OOXML document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of VBA macros suggest an attempt to execute arbitrary code. The macros appear to be obfuscated, but the references to cmd.exe and PowerShell indicate a likely intent to download and execute a second-stage payload.

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.

Filename	Kind	Source	Size
`macros.bas` `c5844a94b43ebc85cedf02a6f7cd2dc46c83e09afb2295fc9e00613076a2fb33`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `44a85a683dcd9f73fe32ebf3b2e6d00abf91c119ee54885797d94902115deb96`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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