447a5eb1795278d379b93a14934ed6d27dd931518aacb597e1534eabec5fda17

Analysis

max time kernel
150s
max time network
160s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
31/12/2023, 13:22

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General

Target

37d5f665081bf379ad8f0d3bcfc9e635.exe
Size

210KB
MD5

37d5f665081bf379ad8f0d3bcfc9e635
SHA1

bd8691e774a4d19887edc7b90095fdd4be13b974
SHA256

447a5eb1795278d379b93a14934ed6d27dd931518aacb597e1534eabec5fda17
SHA512

993dd2f1f3db22b1ef9fb4440be306bc4efe66594dbc61d425ac3d90dcc16805c58262f97adc9931308c69da2436dfc3bf5cc64994c0c95331753b57ac43849c
SSDEEP

3072:J7phzIFu2mciZ4u9Cpb6vIYytbjweflu3VNRzW/wrF9s+Nz9OyD93cHStH7lY385:JtdI+cie4C2vIdZIdk+NB7T7lxtVV

Score

10^/10

bootkit evasion persistence

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 2 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\Windows Update System = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
3024	svchost.exe
2656	svchost.exe

Loads dropped DLL 2 IoCs

pid	Process
2820	37d5f665081bf379ad8f0d3bcfc9e635.exe
2820	37d5f665081bf379ad8f0d3bcfc9e635.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Update System = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Update System = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	svchost.exe
File opened for modification	\??\PhysicalDrive0	37d5f665081bf379ad8f0d3bcfc9e635.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2276 set thread context of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 3024 set thread context of 2656	3024	svchost.exe	30

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	37d5f665081bf379ad8f0d3bcfc9e635.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	37d5f665081bf379ad8f0d3bcfc9e635.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	37d5f665081bf379ad8f0d3bcfc9e635.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2820	37d5f665081bf379ad8f0d3bcfc9e635.exe
2820	37d5f665081bf379ad8f0d3bcfc9e635.exe
2656	svchost.exe
2656	svchost.exe
2656	svchost.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2276	37d5f665081bf379ad8f0d3bcfc9e635.exe
2276	37d5f665081bf379ad8f0d3bcfc9e635.exe
3024	svchost.exe
3024	svchost.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2276 wrote to memory of 2820	2276	37d5f665081bf379ad8f0d3bcfc9e635.exe	28
PID 2820 wrote to memory of 3024	2820	37d5f665081bf379ad8f0d3bcfc9e635.exe	29
PID 2820 wrote to memory of 3024	2820	37d5f665081bf379ad8f0d3bcfc9e635.exe	29
PID 2820 wrote to memory of 3024	2820	37d5f665081bf379ad8f0d3bcfc9e635.exe	29
PID 2820 wrote to memory of 3024	2820	37d5f665081bf379ad8f0d3bcfc9e635.exe	29
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30
PID 3024 wrote to memory of 2656	3024	svchost.exe	30

C:\Users\Admin\AppData\Local\Temp\37d5f665081bf379ad8f0d3bcfc9e635.exe
"C:\Users\Admin\AppData\Local\Temp\37d5f665081bf379ad8f0d3bcfc9e635.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of SetThreadContext
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2276
- C:\Users\Admin\AppData\Local\Temp\37d5f665081bf379ad8f0d3bcfc9e635.exe
  "C:\Users\Admin\AppData\Local\Temp\37d5f665081bf379ad8f0d3bcfc9e635.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2820
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Writes to the Master Boot Record (MBR)
    - Suspicious use of SetThreadContext
    - Modifies registry class
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3024
  - - C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      4⤵
      Modifies firewall policy service
      Executes dropped EXE
      Adds Run key to start application
      Suspicious behavior: EnumeratesProcesses
      PID:2656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
210KB

MD5
37d5f665081bf379ad8f0d3bcfc9e635

SHA1
bd8691e774a4d19887edc7b90095fdd4be13b974

SHA256
447a5eb1795278d379b93a14934ed6d27dd931518aacb597e1534eabec5fda17

SHA512
993dd2f1f3db22b1ef9fb4440be306bc4efe66594dbc61d425ac3d90dcc16805c58262f97adc9931308c69da2436dfc3bf5cc64994c0c95331753b57ac43849c

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
128KB

MD5
fff8dc998d49cf947c4b390f99202d16

SHA1
82c9a9d4ce3ebefed1ccfa3d82750e196f1341c0

SHA256
438eb4764c395e03c44563ae9cbeaad06ffe07fe6c898d17a5bb02608b92ef63

SHA512
042432f6d9b6bd1c53a756a53f6ffa7ffb5aef5f9a560bfda968b689fdd379139d4573d0f310a797056df53546304a53176670c0bfa4fb03c3c0563e266f0c1e

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
45KB

MD5
c69e9c397dc425e2c7e96087bb3a8c09

SHA1
79ed4c067019ce9627d56c1d5e1d3ab7c73fd6d7

SHA256
9f0974cf66dcc7426ee3a85a54cdbb2faecc7e510a0c5410b58b26be78ce387b

SHA512
9df03d9f73714e6c6d4c08d68c19aa0477c152fcec17ca1e0a3e4b3a49267451079c2065a2c6a3bd9ed5c70f92a555ef6f447f7607276508e6ed5d175de53164

Download Submit
\Users\Admin\AppData\Roaming\svchost.exe

Filesize
182KB

MD5
709faa4a1ef5b3b807e78b16690a165b

SHA1
9be41f7c8c15814ab8853fd1d9b23525a8d151ad

SHA256
e3678462253e9759abd4165464c747aa15233b78e99425d7f6447f2d5bd8de00

SHA512
d2dd30d3c150d2ecd8453bde043cad700c5ff1a210b1309f52d716c76c5f9c047500aa022f11ea4d6959db10e6de0d5689d751415b6ba3564f57b2d0e0c13013

Download Submit
memory/2276-26-0x0000000000400000-0x0000000000481029-memory.dmp

Filesize
516KB

Download
memory/2276-21-0x00000000004A0000-0x00000000004A1000-memory.dmp

Filesize
4KB

Download
memory/2276-20-0x00000000004B0000-0x00000000004B1000-memory.dmp

Filesize
4KB

Download
memory/2276-19-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2276-18-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2276-17-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/2276-16-0x0000000000240000-0x0000000000250000-memory.dmp

Filesize
64KB

Download
memory/2276-15-0x00000000003C0000-0x00000000003C1000-memory.dmp

Filesize
4KB

Download
memory/2276-14-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-13-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-11-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-9-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-8-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-5-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-3-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-2-0x00000000003D0000-0x00000000003D2000-memory.dmp

Filesize
8KB

Download
memory/2276-22-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/2276-1-0x0000000000400000-0x0000000000481029-memory.dmp

Filesize
516KB

Download
memory/2276-6-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-10-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2276-0-0x0000000000400000-0x0000000000481029-memory.dmp

Filesize
516KB

Download
memory/2276-7-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2656-64-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-57-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-62-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-69-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-68-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-67-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-58-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-65-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-59-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-63-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-66-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-61-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2656-60-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2820-27-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2820-25-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2820-23-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/3024-38-0x0000000000400000-0x0000000000481029-memory.dmp

Filesize
516KB

Download
memory/3024-45-0x00000000024B0000-0x00000000024B1000-memory.dmp

Filesize
4KB

Download
memory/3024-47-0x00000000024A0000-0x00000000024A1000-memory.dmp

Filesize
4KB

Download
memory/3024-43-0x0000000002480000-0x0000000002481000-memory.dmp

Filesize
4KB

Download
memory/3024-46-0x0000000002490000-0x0000000002491000-memory.dmp

Filesize
4KB

Download
memory/3024-51-0x0000000000400000-0x0000000000481029-memory.dmp

Filesize
516KB

Download
memory/3024-42-0x00000000001D0000-0x00000000001E0000-memory.dmp

Filesize
64KB

Download
memory/3024-37-0x0000000000400000-0x0000000000481029-memory.dmp

Filesize
516KB

Download