Overview

overview

9

Static

static

Preview.exe

windows7_x64

9

Preview.exe

windows10_x64

9

Analysis

  • max time kernel
    13s
  • max time network
    14s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    15/06/2021, 08:57

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General

  • Target
    Preview.exe
  • Size 32KB
  • Sample210615-e2sp28qf3j
  • SHA256 fd80116dffb4a52d6a31d33d06f3ff943c38f6ada8fd3d9e9ffaeb0422a010a9
  • MD5 SHA1 SHA512
Score
9/10

Malware Config

Signatures

  • Nirsoft 7 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Preview.exe
    "C:\Users\Admin\AppData\Local\Temp\Preview.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1096
    • C:\Users\Admin\AppData\Local\Temp\1cfd954f-432c-44ec-9289-cd217aa88bcd\6e794bed-6590-4f12-aa88-282e4fb51c33.exe
      "C:\Users\Admin\AppData\Local\Temp\1cfd954f-432c-44ec-9289-cd217aa88bcd\6e794bed-6590-4f12-aa88-282e4fb51c33.exe" /EXEFilename "C:\Users\Admin\AppData\Local\Temp\Preview.exe" /WindowState ""1"" /PriorityClass ""32"" /CommandLine "" /StartDirectory "" /RunAs 8 /Run
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:268
      • C:\Users\Admin\AppData\Local\Temp\1cfd954f-432c-44ec-9289-cd217aa88bcd\6e794bed-6590-4f12-aa88-282e4fb51c33.exe
        "C:\Users\Admin\AppData\Local\Temp\1cfd954f-432c-44ec-9289-cd217aa88bcd\6e794bed-6590-4f12-aa88-282e4fb51c33.exe" /SpecialRun 4101d8 268
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:568

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/268-68-0x0000000075201000-0x0000000075203000-memory.dmp
        Download

        memory/1096-60-0x0000000000D90000-0x0000000000D91000-memory.dmp
        Download

        memory/1096-63-0x00000000004A0000-0x00000000004FE000-memory.dmp
        Download

        memory/1096-62-0x00000000053D0000-0x00000000053D1000-memory.dmp
        Download