b821b36c8fb61069f672db7ed65062c5e13ce03f2e61dae545a5f4378edb28c2

Analysis

max time kernel
6s
max time network
31s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
03/12/2022, 06:40

Target

b821b36c8fb61069f672db7ed65062c5e13ce03f2e61dae545a5f4378edb28c2.dll
Size

79KB
MD5

6e117900e2f8bd6dbe357d318861a4bd
SHA1

0567a94d12ec923f651143803c4584fa2c03fa9b
SHA256

b821b36c8fb61069f672db7ed65062c5e13ce03f2e61dae545a5f4378edb28c2
SHA512

26dff91a311b435fa9e38c5388b6be4e3ec4f05d74e0fe5e142a9e9d4d7da4d90ec91af64e9ab597b1837f415d6a57f6780ca41529e93097679abaa1d6f4a014
SSDEEP

1536:MfNsbqWmhI6d75bvlsWpcAMQUEwLJRme73f2Q:MfNXWWI6d7JuWPMOomMv2

Score

6^/10

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

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

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

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1108	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 1108	2036	rundll32.exe	28
PID 2036 wrote to memory of 1108	2036	rundll32.exe	28
PID 2036 wrote to memory of 1108	2036	rundll32.exe	28
PID 2036 wrote to memory of 1108	2036	rundll32.exe	28
PID 2036 wrote to memory of 1108	2036	rundll32.exe	28
PID 2036 wrote to memory of 1108	2036	rundll32.exe	28
PID 2036 wrote to memory of 1108	2036	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b821b36c8fb61069f672db7ed65062c5e13ce03f2e61dae545a5f4378edb28c2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b821b36c8fb61069f672db7ed65062c5e13ce03f2e61dae545a5f4378edb28c2.dll,#1
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious behavior: EnumeratesProcesses
  PID:1108

Initial Access

Execution

Persistence

Bootkit

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

memory/1108-55-0x0000000075A91000-0x0000000075A93000-memory.dmp

Filesize
8KB

Download
memory/1108-56-0x0000000000160000-0x000000000016B000-memory.dmp

Filesize
44KB

Download
memory/1108-58-0x0000000010000000-0x000000001000A000-memory.dmp

Filesize
40KB

Download
memory/1108-60-0x0000000000160000-0x000000000016B000-memory.dmp

Filesize
44KB

Download