Office (OOXML) / .XLSM malware analysis — malicious · c1442825db496e97

MALICIOUS

Office (OOXML) / .XLSM

53.1 KB Created: 2020-06-10 10:17:11 UTC Authoring application: Microsoft Excel 16.0300

MD5: 092b7aae9bb0648757de44a1dbc2eda8 SHA-1: 7a21f1f14ca6b1ddd2eecc4f028718d867b03d0d SHA-256: c1442825db496e97bd7f58d26ee270c461cb309617c610365730ea2416b4d3d3

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. Heuristics indicate the use of Shell() and WScript.Shell, suggesting the execution of external commands or scripts. ClamAV detection identifies it as 'Doc.Dropper.Agent-8015063-0', a known dropper. The VBA 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-8015063-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Agent-8015063-0
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` `aee435eca06f92285f324a064826850a0c3a294a554954d3b54f45060e6c070c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	1205 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`vbaProject_00.bin` `c1cd034edab0967f6f9e6e3caa3e2d306796d159ee2970221e90a3c209d14f0a`	vba-project	OOXML VBA project: xl/vbaProject.bin	18432 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`emf_00.emf` `2fa53b05b86dc7fb202ef303843eb22d9153ad8486c37f62bf78bd309e64a9a3`	ooxml-emf	OOXML EMF part: xl/media/image1.emf	2760 bytes
`emf_01.emf` `2ba25cac6053f67d0e4499de57ae9857e23bc490186442d39a632da2832b72c7`	ooxml-emf	OOXML EMF part: xl/media/image2.emf	2352 bytes

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