2f626154e982310a3efc265a8c279dea6c857dac99a96ae698cd797f9dcac174

Analysis

max time kernel
228s
max time network
297s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
27-01-2023 11:08

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General

Target

AppSetup.exe
Size

689.2MB
MD5

51546cad54042b12982cd15f8685dacd
SHA1

1d6d6125139e18d76945732d69d833d915da1a8f
SHA256

fecd31d990a942e012bcb6860cc0f76ce46daaaf7d829d0c08f5972878899ffa
SHA512

a0a922f1a62b24cd3c3383c610cbec4eb0ecd3a595f137650466d0f882b89809eb851505221ceff923a7cd6e2500c48d2e7c4bd52441463b9e5ab4a9f290cf94
SSDEEP

98304:TSWU64N6ik/INEdXihZur3ui/xFKtL7UHfrPlkrAUzXGqb1MTmLgx0ZvSeK+YNmG:T4kQNEdyhq4GHTloxgE1Rs

Score

9^/10

bootkit evasion persistence trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

AppSetup.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ AppSetup.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	AppSetup.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

AppSetup.exe

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

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

AppSetup.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA AppSetup.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:

AppSetup.exe

description ioc process

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

Processes:

AppSetup.exe

pid process

1432 AppSetup.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

AppSetup.exe

pid process

1432 AppSetup.exe
1432 AppSetup.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

AppSetup.exe

description pid process

Token: SeDebugPrivilege 1432 AppSetup.exe

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

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

pid	process
1432	AppSetup.exe

pid	process
1432	AppSetup.exe
1432	AppSetup.exe

description	pid	process
Token: SeDebugPrivilege	1432	AppSetup.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

AppSetup.exe

description	pid	process	target process
PID 1432 wrote to memory of 4600	1432	AppSetup.exe	InstallUtil.exe
PID 1432 wrote to memory of 4600	1432	AppSetup.exe	InstallUtil.exe
PID 1432 wrote to memory of 4600	1432	AppSetup.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\AppSetup.exe
"C:\Users\Admin\AppData\Local\Temp\AppSetup.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- 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 AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1432

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
2⤵
PID:4600

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/1432-132-0x0000000000A90000-0x0000000001A02000-memory.dmp

Filesize
15.4MB

Download
memory/1432-135-0x00007FF9E57F0000-0x00007FF9E59E5000-memory.dmp

Filesize
2.0MB

Download
memory/1432-136-0x0000000000A90000-0x0000000001A02000-memory.dmp

Filesize
15.4MB

Download
memory/1432-137-0x00007FF9C6930000-0x00007FF9C73F1000-memory.dmp

Filesize
10.8MB

Download
memory/1432-138-0x0000000000A90000-0x0000000001A02000-memory.dmp

Filesize
15.4MB

Download
memory/1432-139-0x00007FF9C6930000-0x00007FF9C73F1000-memory.dmp

Filesize
10.8MB

Download
memory/1432-140-0x00007FF9E57F0000-0x00007FF9E59E5000-memory.dmp

Filesize
2.0MB

Download