Overview

overview

10

Static

static

10

e435a95489...in.exe

windows7_x64

10

e435a95489...in.exe

windows10_x64

10

Analysis

  • max time kernel
    46s
  • max time network
    47s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    12/05/2021, 16:57

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General

  • Target
    e435a95489a4ebdfdc12031091f92a7f9c5e3f6cc9b55355ee4030d82553e9ac.bin.exe
  • Size 46KB
  • Sample210512-mdbasw81bx
  • SHA256 e435a95489a4ebdfdc12031091f92a7f9c5e3f6cc9b55355ee4030d82553e9ac
  • MD5 SHA1 SHA512
Score
10/10
mountlockerransomware

Malware Config

Signatures

  • MountLocker Ransomware

    Ransomware family first seen in late 2020, which threatens to leak files if ransom is not paid.

    ransomwaremountlocker
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 6 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops desktop.ini file(s) 27 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 33 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\e435a95489a4ebdfdc12031091f92a7f9c5e3f6cc9b55355ee4030d82553e9ac.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\e435a95489a4ebdfdc12031091f92a7f9c5e3f6cc9b55355ee4030d82553e9ac.bin.exe"
    1⤵
    • Modifies extensions of user files
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4044
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -windowstyle hidden -c $mypid='4044';[System.IO.File]::ReadAllText('C:\Users\Admin\AppData\Local\Temp\~259266296.tmp')|iex
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1500
      • C:\Windows\system32\whoami.exe
        "C:\Windows\system32\whoami.exe" /groups /user
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3000
      • C:\Windows\system32\vssadmin.exe
        "C:\Windows\system32\vssadmin.exe" delete shadows /all /Quiet
        3⤵
        • Interacts with shadow copies
        PID:3088
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\\0F74A686.bat" "C:\Users\Admin\AppData\Local\Temp\e435a95489a4ebdfdc12031091f92a7f9c5e3f6cc9b55355ee4030d82553e9ac.bin.exe""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:208
      • C:\Windows\system32\attrib.exe
        attrib -s -r -h "C:\Users\Admin\AppData\Local\Temp\e435a95489a4ebdfdc12031091f92a7f9c5e3f6cc9b55355ee4030d82553e9ac.bin.exe"
        3⤵
        • Views/modifies file attributes
        PID:264
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2596

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1500-120-0x000002C7EB200000-0x000002C7EB202000-memory.dmp
        Download

        memory/1500-119-0x000002C7EB110000-0x000002C7EB111000-memory.dmp
        Download

        memory/1500-121-0x000002C7EB203000-0x000002C7EB205000-memory.dmp
        Download

        memory/1500-127-0x000002C7EB540000-0x000002C7EB541000-memory.dmp
        Download

        memory/1500-140-0x000002C7EB206000-0x000002C7EB208000-memory.dmp
        Download