72ea0305c64249657bc7be7ffefe6403a74f6bed8c90ef191b7f04d7175d9c8f

Analysis

max time kernel
0s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
27-11-2024 07:14

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Reason

Machine shutdown

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General

Target

X.exe
Size

102KB
MD5

d89f31f22563eb0fdf3828f4df78ed4f
SHA1

7a2a4c411831ebc8a474a68caa810117545f6a0e
SHA256

72ea0305c64249657bc7be7ffefe6403a74f6bed8c90ef191b7f04d7175d9c8f
SHA512

29826d851433b8603e923bc81da066662f6bb107564feb8e1ae9bb344138c2ab4ec7157595aefcec248feb1caa51285293dae927f2ab66b60b7bd8a17e2a2569
SSDEEP

1536:T/LHGj7cvtORUxy6rlp65LkgZqARZW7wIUg9rF0ZzV0imYFU47o9Tuui:7LHCcvMRUc6JcsA677sZ6vYFx7oZo

Score

8^/10

bootkit discovery exploit persistence upx

Malware Config

Signatures

Possible privilege escalation attempt 4 IoCs

exploit

Processes:

icacls.exetakeown.exeicacls.exetakeown.exe

pid	Process
2196	icacls.exe
4236	takeown.exe
4424	icacls.exe
1060	takeown.exe

Modifies file permissions 1 TTPs 4 IoCs

discovery

File and Directory Permissions Modification

T1222

Processes:

icacls.exetakeown.exeicacls.exetakeown.exe

pid	Process
2196	icacls.exe
4236	takeown.exe
4424	icacls.exe
1060	takeown.exe

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

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

bootkit persistence

Bootkit

T1542.003

Processes:

X.exe

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	X.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/4192-0-0x00007FF7E8760000-0x00007FF7E8791000-memory.dmp	upx
behavioral1/memory/4192-2-0x00007FF7E8760000-0x00007FF7E8791000-memory.dmp	upx

Kills process with taskkill 2 IoCs

evasion

Processes:

taskkill.exetaskkill.exe

pid	Process
3396	taskkill.exe
1160	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

X.exe

description	pid	Process	procid_target
PID 4192 wrote to memory of 3384	4192	X.exe	80
PID 4192 wrote to memory of 3384	4192	X.exe	80
PID 4192 wrote to memory of 1060	4192	X.exe	81
PID 4192 wrote to memory of 1060	4192	X.exe	81
PID 4192 wrote to memory of 4424	4192	X.exe	82
PID 4192 wrote to memory of 4424	4192	X.exe	82
PID 4192 wrote to memory of 4236	4192	X.exe	83
PID 4192 wrote to memory of 4236	4192	X.exe	83
PID 4192 wrote to memory of 2196	4192	X.exe	84
PID 4192 wrote to memory of 2196	4192	X.exe	84
PID 4192 wrote to memory of 1160	4192	X.exe	85
PID 4192 wrote to memory of 1160	4192	X.exe	85

C:\Users\Admin\AppData\Local\Temp\X.exe
"C:\Users\Admin\AppData\Local\Temp\X.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of WriteProcessMemory
PID:4192
- C:\Windows\SYSTEM32\manage-bde.exe
  manage-bde -on C: -EncryptionMethod AES-256
  2⤵
  PID:3384
- C:\Windows\SYSTEM32\takeown.exe
  takeown /f D:\ /r /d Y
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:1060
- C:\Windows\SYSTEM32\icacls.exe
  icacls D:\ /grant Everyone:F /t /c /l
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:4424
- C:\Windows\SYSTEM32\takeown.exe
  takeown /f C:\ /r /d Y
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:4236
- C:\Windows\SYSTEM32\icacls.exe
  icacls C:\ /grant Everyone:F /t /c /l
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:2196
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill /F /T /IM LsaIso.exe
  2⤵
  - Kills process with taskkill
  PID:1160
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill /F /T /IM svchost.exe
  2⤵
  - Kills process with taskkill
  PID:3396

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4192-0-0x00007FF7E8760000-0x00007FF7E8791000-memory.dmp

Filesize
196KB

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memory/4192-2-0x00007FF7E8760000-0x00007FF7E8791000-memory.dmp

Filesize
196KB

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Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads