d0a300e4f383ec69a19a637b1c997cef17a873f40efe3363394184b3314d3617

Analysis

max time kernel
90s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 01:12

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General

Target

lxz20100101.exe
Size

857KB
MD5

2ff6e47f1f01bbfe1c6c64b6ae743465
SHA1

d1a6edc9ef8bd4cff95a01d05045b3e0b0b4ec48
SHA256

85fe6d4c5e00a957eb2d9e71b52c0e9861eeccdd9e6d2c3cc2dc04a0e50e3245
SHA512

751876f2884881dccfbaa61f821c51200f96ed7eaa0e511b38fbb0b21a3b08a537ccfb6c18b7f04bcf9d05eb19b949efd13eb9fe082359c430205eb445ae6fae
SSDEEP

24576:4u72yrRsR1uZXJ7/0lBzVkQHOhkBejtacT7x99:4USIXJj0zJHQkBk3T7x7

Score

7^/10

bootkit persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4556	lxzsk.exe

Loads dropped DLL 4 IoCs

pid	Process
4556	lxzsk.exe
4556	lxzsk.exe
4556	lxzsk.exe
4556	lxzsk.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

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

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	lxzsk.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	lxzsk.exe
Key created	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Software\Microsoft\Internet Explorer\IESettingSync	lxzsk.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	lxzsk.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4556	lxzsk.exe
4556	lxzsk.exe
4556	lxzsk.exe
4556	lxzsk.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2444 wrote to memory of 4556	2444	lxz20100101.exe	84
PID 2444 wrote to memory of 4556	2444	lxz20100101.exe	84
PID 2444 wrote to memory of 4556	2444	lxz20100101.exe	84

C:\Users\Admin\AppData\Local\Temp\lxz20100101.exe
"C:\Users\Admin\AppData\Local\Temp\lxz20100101.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Users\Admin\AppData\Local\Temp\lxzsk.exe
  C:\Users\Admin\AppData\Local\Temp
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Writes to the Master Boot Record (MBR)
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:4556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\c.txt

Filesize
1B

MD5
7215ee9c7d9dc229d2921a40e899ec5f

SHA1
b858cb282617fb0956d960215c8e84d1ccf909c6

SHA256
36a9e7f1c95b82ffb99743e0c5c4ce95d83c9a430aac59f84ef3cbfab6145068

SHA512
f90ddd77e400dfe6a3fcf479b00b1ee29e7015c5bb8cd70f5f15b4886cc339275ff553fc8a053f8ddc7324f45168cffaf81f8c3ac93996f6536eef38e5e40768

Download Submit
C:\Users\Admin\AppData\Local\Temp\ggxs.htm

Filesize
2KB

MD5
5adebe2bec9a2ac1ddc77027c2a836f8

SHA1
a7dcc272d87802349ea9d99fcbeb61d6038e9628

SHA256
2d07acd0b1439bb80cc665a41caa93b8ac10aad3897d04d61a53d0e540b0936b

SHA512
6f1b49f122cfe07a3dcc6fcfa09783b6c342cb659f5ab2247fa950b4d84e47e8eb68f9cbf18e9537cb6514b3d8803670d127e37cc99a5ec8add1eb389feb1aef

Download Submit
C:\Users\Admin\AppData\Local\Temp\lxzsk.exe

Filesize
1.2MB

MD5
861e86f2ea863ed8fce380929fca0ffb

SHA1
5d1e02e1bbf89080b365a4989c45645808f6adf5

SHA256
5d1d678e24afccedbcc3b6fac172e78a8c03f186e9e872e193981f5df518dd81

SHA512
5b9558741c39358083afb1d5cd2ea32f4a8c8fa4202002ce87443b98efa24a2fc039126af68d16be36395f81c0cc1a0cc981f8747283a5e7e7717d022aa2837e

Download Submit
C:\Users\Admin\AppData\Local\Temp\smsk.dll

Filesize
2.3MB

MD5
64f7634f911ca1add0eed191b0279b30

SHA1
ff2adb345a424cb2ea6d56290d96cc3d7b4cdbea

SHA256
7724c81344816bdecb0f2e2dee403c7d9c91adcf94a2a0e9b08cb33aa3414ba3

SHA512
d6c05909732045984cef059ce3e56f454cabc44664cae9eb42962092fd7efea85b383efec91bc06125b0dfab995629b67614ca709a96623e9c22da70f3954edd

Download Submit
C:\Users\Admin\AppData\Local\Temp\user.dll

Filesize
58KB

MD5
b00722fe169cd9c299ed680cf1f70f9d

SHA1
d6866e9374f6bc200b79e421b6e49d73e72494a1

SHA256
931e28058383f653f1fd61878fe9dc912e04349b3a55310640069e50f041081b

SHA512
7d6e4be30e33fced995ce38e44870e00fdcfd05f955fcbd2d90658e8d42809fa910493e1ac0839a6b20e472c4f06d7a2f70122ac586d7c71d1264c7e7bef917f

Download Submit
memory/2444-0-0x0000000000400000-0x00000000008D5000-memory.dmp

Filesize
4.8MB

Download
memory/2444-1-0x0000000000A40000-0x0000000000A41000-memory.dmp

Filesize
4KB

Download
memory/2444-2-0x0000000000400000-0x00000000008D5000-memory.dmp

Filesize
4.8MB

Download
memory/2444-8-0x0000000000A90000-0x0000000000A91000-memory.dmp

Filesize
4KB

Download
memory/2444-22-0x0000000000400000-0x00000000008D5000-memory.dmp

Filesize
4.8MB

Download
memory/2444-23-0x0000000000A40000-0x0000000000A41000-memory.dmp

Filesize
4KB

Download
memory/4556-16-0x00000000030D0000-0x00000000030E3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads