Xls.Dropper.Agent-8075801-0 — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 e894ace959ac95fd…

MALICIOUS

Office (OOXML) / .XLSM

62.8 KB Created: 2020-06-08 09:49:47 UTC Authoring application: 16.0300
MD5: a6463920a67e8e7552f23e16c4c4571b SHA-1: 6edd3af0be2d84ede64ed9b0bf9f0317df6f742a SHA-256: e894ace959ac95fda393105d2905b0668ad93781c04be83f9f41fdf38edc1cbc
320 Risk Score

Malware Insights

Xls.Dropper.Agent-8075801-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

This XLSM file contains VBA macros that utilize WScript.Shell and the Shell() function to execute commands. The ClamAV detection 'Xls.Dropper.Agent-8075801-0' strongly suggests this macro is designed to download and execute a second-stage payload. The presence of embedded VBA macros and the specific ClamAV signature indicate a dropper functionality.

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-8075801-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-8075801-0
  • 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.

FilenameKindSourceSize
macros.bas
6733b438f226329c4acecb44fc970a6e52d7e449aa0d33d03a87c444a8676b62		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1019 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
vbaProject_00.bin
fdc14df41d328706c77bb4892fb8f789da8f050f9e0e41ad221675ef257f66b8		 vba-project OOXML VBA project: xl/vbaProject.bin 15360 bytes
Detection
ClamAV: Xls.Dropper.Agent-8075801-0
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
emf_00.emf
7662b9566e5b6268237939d70430c3c63587ce1f24b006f3e9ac5aa87ce327cd		 ooxml-emf OOXML EMF part: xl/media/image1.emf 3420 bytes

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