15d38a01c168d7a82ae39f5ffbbdd0cf482d53f2d54b747ff0d936395a016583

Analysis

max time kernel
120s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
09/05/2024, 07:28

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General

Target
$PLUGINSDIR/HWSignature.dll
Size 78KB
Sample240509-jaslasae98
SHA256 db94c2c836176fd0a96b8333437c82b3482a39c6ae2eefe295c981954e7a487e
MD5 87c80914dfc65df16f5ff36040666da3
SHA1 06aefe9570ef484a322c53297152f1ea50746878
SHA512 bd8b685b9e698593f885dcab587ba6d61612e88d25c2a290cac3e61fded732ff493508d22d394d903f3a4f4c88c7533c3f534890c40df37114c8b640022c788f
SSDEEP 1536:+yy9dfS2m0a5Yn7ar2X9Pm8BamPP5w2xGEmkl:+yy9deHKo8BamPP5wY/mM
MD5 SHA1 SHA512 SSDEEP

Score

6^/10

bootkit persistence

Malware Config

Signatures

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
2980	2836	WerFault.exe	28

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2612 wrote to memory of 2836	2612	rundll32.exe	28
PID 2612 wrote to memory of 2836	2612	rundll32.exe	28
PID 2612 wrote to memory of 2836	2612	rundll32.exe	28
PID 2612 wrote to memory of 2836	2612	rundll32.exe	28
PID 2612 wrote to memory of 2836	2612	rundll32.exe	28
PID 2612 wrote to memory of 2836	2612	rundll32.exe	28
PID 2612 wrote to memory of 2836	2612	rundll32.exe	28
PID 2836 wrote to memory of 2980	2836	rundll32.exe	29
PID 2836 wrote to memory of 2980	2836	rundll32.exe	29
PID 2836 wrote to memory of 2980	2836	rundll32.exe	29
PID 2836 wrote to memory of 2980	2836	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\HWSignature.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2612
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\HWSignature.dll,#1
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of WriteProcessMemory
  PID:2836
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2836 -s 388
    3⤵
    - Program crash
    PID:2980

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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