f3b4bae7a22377555872f096b9ec176220734206d932e34d0e00ab43aa7086e8

Analysis

max time kernel
0s
platform
windows11-21h2_x64
resource
win11-20241023-en
resource tags

arch:x64arch:x86image:win11-20241023-enlocale:en-usos:windows11-21h2-x64system
submitted
27-11-2024 09:21

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Reason

Machine shutdown

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General

Target

X.exe
Size

102KB
MD5

ee9f2554cdcbd39e2b39962f1e7afe36
SHA1

a987a60fceec3b3e1bc14b5dcb7a8985af9bf61d
SHA256

f3b4bae7a22377555872f096b9ec176220734206d932e34d0e00ab43aa7086e8
SHA512

977ce766a806f81ac80e398810da229ca03992e270cc5d7fa258ac266d5bf6968b330354dfb29b8d5bc29927e54e0662878a44f523561590500880c36835fb68
SSDEEP

1536:985VEH2aNU2o5DX776Nc8mSsQWUYXtJWi/t23z52s0imYFU47o9Tuui:9sE2aNU2WDX7+NEUri42vYFx7oZo

Score

8^/10

bootkit discovery exploit persistence upx

Malware Config

Signatures

Possible privilege escalation attempt 4 IoCs

exploit

Processes:

takeown.exeicacls.exetakeown.exeicacls.exe

pid	Process
2140	takeown.exe
3456	icacls.exe
4656	takeown.exe
4992	icacls.exe

Modifies file permissions 1 TTPs 4 IoCs

discovery

File and Directory Permissions Modification

T1222

Processes:

takeown.exeicacls.exetakeown.exeicacls.exe

pid	Process
2140	takeown.exe
3456	icacls.exe
4656	takeown.exe
4992	icacls.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 1 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1676-0-0x00007FF7F3E60000-0x00007FF7F3E91000-memory.dmp	upx

Kills process with taskkill 2 IoCs

evasion

Processes:

taskkill.exetaskkill.exe

pid	Process
1248	taskkill.exe
3408	taskkill.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

X.exe

description	pid	Process	procid_target
PID 1676 wrote to memory of 3448	1676	X.exe	80
PID 1676 wrote to memory of 3448	1676	X.exe	80
PID 1676 wrote to memory of 2140	1676	X.exe	81
PID 1676 wrote to memory of 2140	1676	X.exe	81
PID 1676 wrote to memory of 4992	1676	X.exe	82
PID 1676 wrote to memory of 4992	1676	X.exe	82
PID 1676 wrote to memory of 4656	1676	X.exe	83
PID 1676 wrote to memory of 4656	1676	X.exe	83
PID 1676 wrote to memory of 3456	1676	X.exe	84
PID 1676 wrote to memory of 3456	1676	X.exe	84
PID 1676 wrote to memory of 3408	1676	X.exe	85
PID 1676 wrote to memory of 3408	1676	X.exe	85
PID 1676 wrote to memory of 1248	1676	X.exe	86
PID 1676 wrote to memory of 1248	1676	X.exe	86

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:1676
- C:\Windows\SYSTEM32\manage-bde.exe
  manage-bde -on C: -EncryptionMethod AES-256
  2⤵
  PID:3448
- C:\Windows\SYSTEM32\takeown.exe
  takeown /f D:\ /r /d Y
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:2140
- C:\Windows\SYSTEM32\icacls.exe
  icacls D:\ /grant Everyone:F /t /c /l
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:4992
- C:\Windows\SYSTEM32\takeown.exe
  takeown /f C:\ /r /d Y
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:4656
- C:\Windows\SYSTEM32\icacls.exe
  icacls C:\ /grant Everyone:F /t /c /l
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:3456
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill /F /T /IM LsaIso.exe
  2⤵
  - Kills process with taskkill
  PID:3408
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill /F /T /IM svchost.exe
  2⤵
  - Kills process with taskkill
  PID:1248

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/1676-0-0x00007FF7F3E60000-0x00007FF7F3E91000-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