542a38bf52afa6a4a008089a6fbf22c9d68ef5d6c634dd2c0773d859a8ae2bbf | Triage

Analysis

max time kernel
4s
max time network
22s
platform
windows10_x64
resource
win10v20210408
submitted
26-07-2021 12:59

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General

Target

542a38bf52afa6a4a008089a6fbf22c9d68ef5d6c634dd2c0773d859a8ae2bbf.sample.dll
Size

47KB
MD5

7899d6090efae964024e11f6586a69ce
SHA1

9078e741d6d66fb6b4920878f0b7cd6a0f8b1cc7
SHA256

542a38bf52afa6a4a008089a6fbf22c9d68ef5d6c634dd2c0773d859a8ae2bbf
SHA512

566ab18ec22115fff4a2ea41fdb4ed27249f27186bb41b69637d7eafd82e79723e36df4a377a80c7ea51617702116eaf8fe44a5fe4275e1ace1bdf6afaa5c40f

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
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeShutdownPrivilege 1496 rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 992 wrote to memory of 1496	992	rundll32.exe	rundll32.exe
PID 992 wrote to memory of 1496	992	rundll32.exe	rundll32.exe
PID 992 wrote to memory of 1496	992	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\542a38bf52afa6a4a008089a6fbf22c9d68ef5d6c634dd2c0773d859a8ae2bbf.sample.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:992

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\542a38bf52afa6a4a008089a6fbf22c9d68ef5d6c634dd2c0773d859a8ae2bbf.sample.dll,#1
2⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of AdjustPrivilegeToken
PID:1496

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Bootkit

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1496-114-0x0000000000000000-mapping.dmp

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