a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93

Analysis

max time kernel
25s
max time network
47s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
06/12/2022, 10:18

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General

Target

a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe
Size

239KB
MD5

cd326121f9d16574b2591b614048397a
SHA1

2dedad92b8323ad1d16ea4fb23220bb096e86b1d
SHA256

a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93
SHA512

68ad34d07afb9f6a1a65e15b833961fb731b3d58da2797b432df5a99356ec45d71b8b2c27368cf3fc516a20bc5c28efb02f38740fc0b14ce516727987c1c84f8
SSDEEP

6144:dsdBntcEjjoAmqVnVW5GJZ2tNYLj8MfsTqZabj1RUyswe:OpCpq9VzYKj86sTvUf

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

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1620 set thread context of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1104	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe
1104	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27
PID 1620 wrote to memory of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27
PID 1620 wrote to memory of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27
PID 1620 wrote to memory of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27
PID 1620 wrote to memory of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27
PID 1620 wrote to memory of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27
PID 1620 wrote to memory of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27
PID 1620 wrote to memory of 1104	1620	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	27
PID 1104 wrote to memory of 1388	1104	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	11
PID 1104 wrote to memory of 1388	1104	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	11
PID 1104 wrote to memory of 1388	1104	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	11
PID 1104 wrote to memory of 1388	1104	a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe	11

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1388
- C:\Users\Admin\AppData\Local\Temp\a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe
  "C:\Users\Admin\AppData\Local\Temp\a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Modifies registry class
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1620
- - C:\Users\Admin\AppData\Local\Temp\a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe
    C:\Users\Admin\AppData\Local\Temp\a7a4c1a776ac91a59c3570c6b87158ad4113e98f830ad0bd6ddce25aefe84b93.exe
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1104

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1104-56-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1104-57-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1104-59-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1104-60-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1104-64-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1104-65-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/1104-69-0x0000000010000000-0x0000000010013000-memory.dmp

Filesize
76KB

Download
memory/1104-70-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1388-66-0x000000007FFF0000-0x000000007FFF7000-memory.dmp

Filesize
28KB

Download
memory/1620-63-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download