Office (OOXML) / .OLE malware analysis — malicious · c22d9e78e405a508

MALICIOUS

Office (OOXML) / .OLE

75.1 KB Created: 2020-06-15 08:33:52 UTC Authoring application: Microsoft Excel 16.0300

MD5: 0884c5d968d9b8bd8a2ce11a9902fb46 SHA-1: a7e827c7538e612e2b5afa6d4217786915ddbc2e SHA-256: c22d9e78e405a50881314ec4a79b7e34fec522d7a9ee1b8dbe5e8669861c6654

320 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The file is an OOXML document containing VBA macros, as indicated by multiple heuristic firings including OLE_VBA_SHELL, OLE_VBA_WSCRIPT, and OLE_VBA_CREATEOBJ. ClamAV detections (Xls.Dropper.Agent-8054171-0) on both the main file and an extracted artifact confirm its malicious nature. The presence of VBA macros and the use of WScript.Shell strongly suggest the macro is designed to execute commands, likely to download and run a second-stage payload. The document body content appears to be obfuscated or encoded data, further supporting a malicious intent rather than legitimate document content.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
ClamAV: Xls.Dropper.Agent-8054171-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Dropper.Agent-8054171-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
Suspicious extracted artifact medium 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `a2c932d5c1f994223fe4bc2a48c9177b62e8a7041dd53abab02a8a682c584235`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	1135 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`vbaProject_00.bin` `3976a0bf4e66a3b74c942b73e10db1b824cd3d83c66cd3575a34baf427be5c3b`	vba-project	OOXML VBA project: xl/vbaProject.bin	15360 bytes
Detection ClamAV: Xls.Dropper.Agent-8054171-0 Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`emf_00.emf` `9a16976c701f6813b7a8d98761299f94e5eca283636006616aebbdd14393fe75`	ooxml-emf	OOXML EMF part: xl/media/image1.emf	1976 bytes

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