Overview

overview

10

Static

static

3

test.exe

windows7-x64

10

test.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    6s
  • max time network
    45s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-12-2024 01:58

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General

  • Target

    test.exe

  • Size

    1.1MB

  • MD5

    bc78307b49282fd1039a09c88f5e57d9

  • SHA1

    56ca25bc143ec38871fa5e96561437755a9d0de9

  • SHA256

    06918af465e607aa81a46042c24e6a8c45d7c983f33ee621caad6b25464dd27a

  • SHA512

    af4d43f05b3583d07fb96e0815bcc5624e7e3eb110981a21ff82ec07829bcdfd3d23c7de1b673a41bfb41ac20614f27a28389aed80f75a4399c52b351ba5b5f5

  • SSDEEP

    24576:u4s+oT+NXBLi0rjFXvyHBlbmCZa8Ch1972J1+i3DO2gik:uioT+NXVFjxvMBlbmya8CF4TO2K

Score
10/10
avoslockerdefense_evasiondiscoveryevasionexecutionimpactransomware

Malware Config

Signatures

  • Avoslocker Ransomware

    Avoslocker is a relatively new ransomware, that was observed in late June and early July, 2021.

    ransomwareavoslocker
  • Avoslocker family
    avoslocker
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
    ransomwareevasion
  • Renames multiple (4065) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

    execution
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Interacts with shadow copies 3 TTPs 1 IoCs

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

    ransomware
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\test.exe
    "C:\Users\Admin\AppData\Local\Temp\test.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4248
    • C:\Windows\SYSTEM32\cmd.exe
      cmd /c wmic shadowcopy delete /nointeractive
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2276
      • C:\Windows\System32\Wbem\WMIC.exe
        wmic shadowcopy delete /nointeractive
        3⤵
          PID:1060
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin.exe Delete Shadows /All /Quiet
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2884
        • C:\Windows\system32\vssadmin.exe
          vssadmin.exe Delete Shadows /All /Quiet
          3⤵
          • Interacts with shadow copies
          PID:37552
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c bcdedit /set {default} recoveryenabled No
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4272
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled No
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:1596
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c bcdedit /set {default} bootstatuspolicy ignoreallfailures
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1912
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:37576
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
        2⤵
          PID:3008
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
            3⤵
            • Command and Scripting Interpreter: PowerShell
            PID:31024
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\GET_YOUR_FILES_BACK.txt
        1⤵
        • Opens file in notepad (likely ransom note)
        PID:18452

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\GET_YOUR_FILES_BACK.txt
        Filesize

        1011B

        MD5

        c92c2b70fb37f84aab38412ad9226aa8

        SHA1

        14f2e9a83285612d0a7b2c83b8f89bccfde6c154

        SHA256

        d64639e873c0873b469cd856d1ef4bce7dc14a80fac6fe2bed9d629f05acc77f

        SHA512

        04f9dcb3cd49909712535255b6eadd7fafcb2902bf1abd5a25e9bb5f5c4dc032611aec0a5b0ec89cd7dbc65276b935c54b906b391507d2e3e3aa65466b15f848

        Download Submit

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l0y5m1dz.4ig.ps1
        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        Download Submit

      • memory/31024-22790-0x0000023A506B0000-0x0000023A506D2000-memory.dmp

        Filesize

        136KB

        Download