Analysis

  • max time kernel
    151s
  • max time network
    39s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    13/11/2020, 17:00

General

  • Target
    document-17050035.xlsb
  • Size 291KB
  • Sample201113-sf2bxql5va
  • SHA256 eabcd639f635d5490483907db2def22944c875ff6fee186a1980d3d22e4d74a6
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://we11wdsgd.com/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 3 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 504 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\document-17050035.xlsb
    1⤵
    • Loads dropped DLL
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2024
    • C:\giogti\mpopqr\fwpxeohi.exe
      "C:\giogti\mpopqr\fwpxeohi.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:240

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/240-5-0x00000000006D0000-0x00000000006E1000-memory.dmp

        memory/1268-7-0x0000000003AA0000-0x0000000003AB5000-memory.dmp

        memory/1984-0-0x000007FEF77C0000-0x000007FEF7A3A000-memory.dmp