8a4db7c132185d220c5e039b09f93b446c4bc9a53f97779a007088c8e40a6a44

Analysis

max time kernel
25s
max time network
150s
platform
windows10_x64
resource
win10v20210408
submitted
09-07-2021 04:31

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General

Target

vmtools.exe-.exe
Size

3.8MB
MD5

46f4a0344fda2a58426e4ef513c29341
SHA1

0f894a455821287981084d2b3b9d6c48cdf13cbf
SHA256

8a4db7c132185d220c5e039b09f93b446c4bc9a53f97779a007088c8e40a6a44
SHA512

3784648dfd0d4ff21320464a61c939f15c9a93ddbe7e1155f57c8077b61d588c34140fb166a358ffa6ab64c95400e3b744a1a44fc5acea47f53604869cafec56

Score

9^/10

bootkit evasion persistence trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 3 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

vmtools.exe-.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	vmtools.exe-.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	vmtools.exe-.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	vmtools.exe-.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

vmtools.exe-.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA vmtools.exe-.exe
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:

vmtools.exe-.exe

description ioc process

File opened for modification \??\PhysicalDrive0 vmtools.exe-.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

vmtools.exe-.exe

pid process

900 vmtools.exe-.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

vmtools.exe-.exe

pid process

900 vmtools.exe-.exe
900 vmtools.exe-.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

vmtools.exe-.exe

pid process

900 vmtools.exe-.exe
900 vmtools.exe-.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	vmtools.exe-.exe

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

pid	process
900	vmtools.exe-.exe

pid	process
900	vmtools.exe-.exe
900	vmtools.exe-.exe

pid	process
900	vmtools.exe-.exe
900	vmtools.exe-.exe

C:\Users\Admin\AppData\Local\Temp\vmtools.exe-.exe
"C:\Users\Admin\AppData\Local\Temp\vmtools.exe-.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:900

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/900-114-0x0000000000820000-0x000000000121D000-memory.dmp

Filesize
10.0MB

Download
memory/900-115-0x0000000000821000-0x000000000096C000-memory.dmp

Filesize
1.3MB

Download