Office (OOXML) / .XLSM malware analysis — malicious · 38ffdb2d6f9b160e

MALICIOUS

Office (OOXML) / .XLSM

70.2 KB Created: 2020-05-20 10:51:53 UTC Authoring application: Microsoft Excel 16.0300

MD5: d887b01f72859260acf3ebaa71f3d017 SHA-1: 5afed8a0d09f4389f74f5b7b18a6bbf7e1768a71 SHA-256: 38ffdb2d6f9b160eed1502d6cdd7af90acb31dabb747e88226a2689041d23b2d

260 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is an XLSM file containing VBA macros. Critical heuristics indicate the use of Shell() and WScript.Shell, suggesting the macros are designed to execute arbitrary commands. The ClamAV detection name 'Doc.Dropper.Agent-7855339-0' further supports that this is a dropper. The macros likely download and execute a second-stage payload.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
ClamAV: Doc.Dropper.Agent-7855339-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Agent-7855339-0
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `89c2b820481039c3de18fd25a0da029ccf663aacb95eb1ec342b943b38135243`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	1339 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`vbaProject_00.bin` `9971290ce6c16bf6c51acf40cb2ad3d209be9a1667e274b1f42f021330cbd39f`	vba-project	OOXML VBA project: xl/vbaProject.bin	16896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`emf_00.emf` `78351c630129b768cd66884baebab8b62e4ded3490f425e9440c6282c681c9ae`	ooxml-emf	OOXML EMF part: xl/media/image1.emf	2748 bytes
`emf_01.emf` `3dc347a35e0db4ff1f94190b4e5af4f23db5ac24f1978b95ae0f0a933fae8b57`	ooxml-emf	OOXML EMF part: xl/media/image2.emf	1976 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.