290cdbf4f133d4725e3b71947de7257e1b76ac0f9efdf0d5b766cbdf7f68fb08

Analysis

max time kernel
140s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
11/01/2024, 10:34

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

290cdbf4f133d4725e3b71947de7257e1b76ac0f9efdf0d5b766cbdf7f68fb08.dll
Size

4.8MB
MD5

2a0930f462f3a2e5b74b1db1b128b550
SHA1

d1d1f8a9a65fb38cc1fc2337a696f88d63ad39d1
SHA256

290cdbf4f133d4725e3b71947de7257e1b76ac0f9efdf0d5b766cbdf7f68fb08
SHA512

7fa623c94ee2d62f427a9ea736a60fda4168d8ac137385a0bbbba16836b04c9991b6dfbcc9e1093291451489259424c24165819dd6d44826debaf8396e1d2250
SSDEEP

98304:u3VOzR5v8Qm/jEXUx4w6kLLF/9aNtFuSbfr0hz7m:kbsgKttzI

Score

8^/10

bootkit persistence

Malware Config

Signatures

Blocklisted process makes network request 3 IoCs

flow	pid	Process
7	4496	rundll32.exe
8	4496	rundll32.exe
21	4496	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
4496	rundll32.exe
4496	rundll32.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	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4752	4496	WerFault.exe	87

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 4496	2528	rundll32.exe	87
PID 2528 wrote to memory of 4496	2528	rundll32.exe	87
PID 2528 wrote to memory of 4496	2528	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\290cdbf4f133d4725e3b71947de7257e1b76ac0f9efdf0d5b766cbdf7f68fb08.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\290cdbf4f133d4725e3b71947de7257e1b76ac0f9efdf0d5b766cbdf7f68fb08.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Writes to the Master Boot Record (MBR)
  PID:4496
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4496 -s 1648
    3⤵
    - Program crash
    PID:4752

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4496 -ip 4496
1⤵
PID:2604

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\netul.dll

Filesize
384KB

MD5
9c7b76d69c67618fda3b54a380378963

SHA1
3e0238d54e652746e9b331e9c341026ff26390cd

SHA256
121f365a0c7d0c7e1983d23ea6c4b73f2b0fb1430c3e61f936e8e0d512e5bdf7

SHA512
10aa256b8faad0777903da89aff85a6d0131d5f4db1cea05b42ca69e18d01e610ee1bfecd1c8494f2b8fcebe83fd7dd4c9eeb6bf8c894f7bbd07afde667f1d94

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

Filesize
1.1MB

MD5
26173e9c3998876d8d21d5063e02d3dd

SHA1
45eef50d6f845622a3384e34529abd9df43720c9

SHA256
b1cc9445fd331df90f3dcd5eacbeff62ac9189aa867def1970bf1d755ef43b31

SHA512
4f28a32b9e538e10de1533d8168a0b2e81793e73310d224bde4648b17f8bb9d1d24d0b40cc6f9b819489a0c7de1804d381d936069a093543b8aa0d3c62a50f12

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads