Overview

overview

10

Static

static

sample.exe

windows7_x64

10

sample.exe

windows10_x64

10

Resubmissions

02/07/2021, 00:58

210702-mms73ncjwn 10

21/06/2021, 17:05

210621-et1vzla7t2 10

Analysis

  • max time kernel
    149s
  • max time network
    177s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    21/06/2021, 17:05

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General

  • Target

    sample.exe

  • Size

    81KB

  • MD5

    9c543a3b162b8e9317c717892ba47691

  • SHA1

    52980b81ca21b6c02793272dea788f18c03c66bf

  • SHA256

    d56cfe09f291b11e27b84ede219459ede65652a19596a0b33f8a3ef871236cf5

  • SHA512

    502a5390c777c4c8f3848c66b7accc670b0ebbc7947253d8bb2c73e3b55097870f97142088d337c125d0e545a96ac3e06688c81a0f4935541439a7d58d918c04

Score
10/10
evasionpersistenceransomwaretrojan

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • UAC bypass 3 TTPs
    evasiontrojan
  • Disables Task Manager via registry modification
    evasion
  • Modifies extensions of user files 5 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
    evasiontrojan
  • Drops desktop.ini file(s) 6 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 13 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 20 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • System policy modification 1 TTPs 1 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\sample.exe
    "C:\Users\Admin\AppData\Local\Temp\sample.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Modifies extensions of user files
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • System policy modification
    PID:1120
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x594
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:800
  • C:\Windows\system32\rundll32.exe
    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\SubmitSend.contact.SLAM
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:920
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\SubmitSend.contact.SLAM
      2⤵
      • Opens file in notepad (likely ransom note)
      PID:744

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/920-66-0x000007FEFB681000-0x000007FEFB683000-memory.dmp

    Filesize

    8KB

    Download

  • memory/1120-60-0x0000000000F80000-0x0000000000F81000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1120-62-0x00000000003D0000-0x00000000003D1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1120-63-0x00000000003D5000-0x00000000003E6000-memory.dmp

    Filesize

    68KB

    Download

  • memory/1120-64-0x00000000003E6000-0x00000000003E7000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1120-65-0x00000000003E7000-0x00000000003E8000-memory.dmp

    Filesize

    4KB

    Download