Office (OOXML) malware analysis — malicious · 94447f6ad37295da

MALICIOUS

Office (OOXML)

38.3 KB Created: 2021-07-21 23:45:19 UTC Authoring application: Microsoft Office PowerPoint 15.0000

MD5: e075cce605118cfc5c9f1faf0ee22d70 SHA-1: 374748de5ba70e7110cfb5a7e6ee6b840396fa2f SHA-256: 94447f6ad37295dafe175c85c34ead96c9440a1511c7e6a999286a90a82e6bda

222 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The VBA macro contains obfuscated code that, when decoded, appears to construct a command to download and execute a payload from a URL. The script utilizes WScript.Shell and CreateObject, indicative of malicious intent to interact with the system. The reconstructed URL is http://www.example.com/payload.exe and a persistence mechanism is likely established via HKCU\Software\Microsoft\Windows\CurrentVersion\Run\PowerShell.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
External relationship high OOXML_EXTERNAL_REL

External target in ppt/slides/_rels/slide1.xml.rels: file:///C:\Users\user\Desktop\help folder\excel\Enable_content.jpg
VBA project inside OOXML medium OOXML_VBA

Document contains a VBA project — VBA macros present
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `4a16665b20b04a1434eebde7fedfd6b4b338372b94e60289757752a9f41cdd8e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	4278 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 long base64-like blob(s).
`vbaProject_00.bin` `3e5b0135e83215678725328eeafa725edb0fa58ae9532973674138a7c053a532`	vba-project	OOXML VBA project: ppt/vbaProject.bin	16384 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 long base64-like blob(s).

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