a265c3fc5fce88029aa567ea6f87b4a5af036d6647fb58ac872fa9cde78aa932

Analysis

max time kernel
36s
max time network
41s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
05-12-2022 10:07

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General

Target

a265c3fc5fce88029aa567ea6f87b4a5af036d6647fb58ac872fa9cde78aa932.dll
Size

3.9MB
MD5

045d853f0cd009f71b5519e3b54d26f8
SHA1

972f166eae9b88bbd6ffc1a61a3d4a75793b143f
SHA256

a265c3fc5fce88029aa567ea6f87b4a5af036d6647fb58ac872fa9cde78aa932
SHA512

2e5bb045d97f1c135f30c8fe35b30120e49f17eb56b0303d61d347977ce000b3f3a3d2e70b1255152f5f8479a6a5d57077ee7d38b1a87b6c869a614bb7d1bdee
SSDEEP

49152:M5t7w2BHKIhxZx/MFA41A9QkBxvXxZyI+9n1Op09B/pw1f/xqBzcEA+62a6h/URx:M5Bw2Bzx0k9/BZXxkIWPG1f5e7aU2SzA

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
T1067

Processes:

rundll32.exe

description ioc process

File opened for modification \??\PhysicalDrive0 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1700 1620 WerFault.exe rundll32.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	rundll32.exe

pid	pid_target	process	target process
1700	1620	WerFault.exe	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 364 wrote to memory of 1620	364	rundll32.exe	rundll32.exe
PID 364 wrote to memory of 1620	364	rundll32.exe	rundll32.exe
PID 364 wrote to memory of 1620	364	rundll32.exe	rundll32.exe
PID 364 wrote to memory of 1620	364	rundll32.exe	rundll32.exe
PID 364 wrote to memory of 1620	364	rundll32.exe	rundll32.exe
PID 364 wrote to memory of 1620	364	rundll32.exe	rundll32.exe
PID 364 wrote to memory of 1620	364	rundll32.exe	rundll32.exe
PID 1620 wrote to memory of 1700	1620	rundll32.exe	WerFault.exe
PID 1620 wrote to memory of 1700	1620	rundll32.exe	WerFault.exe
PID 1620 wrote to memory of 1700	1620	rundll32.exe	WerFault.exe
PID 1620 wrote to memory of 1700	1620	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a265c3fc5fce88029aa567ea6f87b4a5af036d6647fb58ac872fa9cde78aa932.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:364

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a265c3fc5fce88029aa567ea6f87b4a5af036d6647fb58ac872fa9cde78aa932.dll,#1
2⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of WriteProcessMemory
PID:1620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1620 -s 376
3⤵
- Program crash
PID:1700

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1620-54-0x0000000000000000-mapping.dmp

Download
memory/1620-55-0x0000000076681000-0x0000000076683000-memory.dmp

Filesize
8KB

Download
memory/1700-56-0x0000000000000000-mapping.dmp

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