Office (OLE) / .PPT malware analysis — malicious · 0d8264e6c9f93db8

MALICIOUS

Office (OLE) / .PPT

66.0 KB Created: 2021-03-01 22:30:06 Authoring application: Microsoft Office PowerPoint

MD5: 20884369d25aeb20f8a45c464cab0ff4 SHA-1: c81fe784cb90f374d6790fad65a0144f9bfce85f SHA-256: 0d8264e6c9f93db868184bedfd0c54b5ad4ab8dd81b90c2e2106da6c1e9a4d3b

262 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample is a PowerPoint file containing VBA macros that are automatically executed via the Auto_Open subroutine. The macros utilize Shell() calls and obfuscated API names to download and execute a second-stage payload. Specifically, the script attempts to execute 'calc' and constructs a URL using concatenated strings, which likely points to the download location of the next stage. The presence of CreateObject and Shell() calls, along with obfuscation techniques, strongly suggests a malicious downloader.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Dangerous API name reassembled from split string literals critical OLE_VBA_SPLIT_KEYWORD_OBFUSCATION

VBA concatenates short string literals that reassemble a dangerous API/ProgID/LOLBin name (e.g. Scripting.FileSystemObject, WScript.Shell, powershell, URLDownloadToFile) which appears in no single literal. Splitting an API name across string concatenation is done only to evade keyword scanning.
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://12384928198391823%12384928198391823@j.mp/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `b8f0caf6fbe4d6c619ed6cd6e4ee257ea2c637b2a7b543d746da0c0c365bea6b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2103 bytes

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