da3ac98fe7c18ae61e732c9cee9d7ed8a5808d678d4f934b3bbb434b19b2e7e4

Resubmissions

01-07-2024 01:28

240701-bv7a7avhjm 9

01-07-2024 01:19

240701-bpkj8sveqm 9

Analysis

max time kernel
147s
max time network
276s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-07-2024 01:19

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General

Target

MW3_Chair.exe
Size

15.6MB
MD5

ce8f99f5b92137f00ef50f08d80c0dba
SHA1

daefb55e55e243f0734a9ccd4ecdaba9043ee505
SHA256

da3ac98fe7c18ae61e732c9cee9d7ed8a5808d678d4f934b3bbb434b19b2e7e4
SHA512

b83c9bd35dfae276d3d2940c153246c98aa2c53e4b1e77db2083e66ad4bcb63b179b1d6699e0f4cd808e201a79f2c1af36955bd1f22ef37cc830b91ef3df0e09
SSDEEP

393216:fyvPl1A8LtIzbhAuqTkOOqtc2BeX5N+Xy28bpa+2BIX7+k5LyCMYvK:crZtobqjkOOqq2BVXSbpaX6NRytX

Score

9^/10

evasion execution persistence themida 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:

MW3_Chair.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ MW3_Chair.exe
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002
Drops file in Drivers directory 1 IoCs

Processes:

MW3_Chair.exe

description ioc process

File created C:\Windows\System32\drivers\winhb.sys MW3_Chair.exe
Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	MW3_Chair.exe

description	ioc	process
File created	C:\Windows\System32\drivers\winhb.sys	MW3_Chair.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:

MW3_Chair.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	MW3_Chair.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	MW3_Chair.exe

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

MW3_Chair.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation MW3_Chair.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	MW3_Chair.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/4424-0-0x0000000140000000-0x0000000142290000-memory.dmp	themida
behavioral1/memory/4424-1-0x0000000140000000-0x0000000142290000-memory.dmp	themida
behavioral1/memory/4424-2-0x0000000140000000-0x0000000142290000-memory.dmp	themida
behavioral1/memory/4424-3-0x0000000140000000-0x0000000142290000-memory.dmp	themida
behavioral1/memory/4424-15-0x0000000140000000-0x0000000142290000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

MW3_Chair.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA MW3_Chair.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	MW3_Chair.exe

Drops file in System32 directory 2 IoCs

Processes:

MW3_Chair.exe

description	ioc	process
File opened for modification	C:\Windows\System32\config\RegBack\{69CD1F2D-DF68-4E23-9108-1B70783F2444}	MW3_Chair.exe
File opened for modification	C:\Windows\System32\IME\SHARED\namef.ini	MW3_Chair.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

MW3_Chair.exe

pid process

4424 MW3_Chair.exe
Drops file in Windows directory 1 IoCs

Processes:

MW3_Chair.exe

description ioc process

File opened for modification C:\Windows\schemas\Provisioning\{69CD1F2D-DF68-4E23-9108-UPDATE} MW3_Chair.exe
Launches sc.exe 4 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exesc.exe

pid process

2064 sc.exe
368 sc.exe
680 sc.exe
2044 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Windows\schemas\Provisioning\{69CD1F2D-DF68-4E23-9108-UPDATE}	MW3_Chair.exe

pid	process
2064	sc.exe
368	sc.exe
680	sc.exe
2044	sc.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

Processes:

MW3_Chair.exe

pid	process
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe
4424	MW3_Chair.exe

Suspicious behavior: LoadsDriver 1 IoCs

Processes:

pid process

656

pid	process
656

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

MW3_Chair.exe

description	pid	process
Token: SeBackupPrivilege	4424	MW3_Chair.exe
Token: SeSecurityPrivilege	4424	MW3_Chair.exe
Token: SeBackupPrivilege	4424	MW3_Chair.exe
Token: SeSecurityPrivilege	4424	MW3_Chair.exe
Token: SeBackupPrivilege	4424	MW3_Chair.exe
Token: SeSecurityPrivilege	4424	MW3_Chair.exe
Token: SeBackupPrivilege	4424	MW3_Chair.exe
Token: SeSecurityPrivilege	4424	MW3_Chair.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

MW3_Chair.execmd.execmd.execmd.execmd.exe

description	pid	process	target process
PID 4424 wrote to memory of 1796	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 1796	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 4436	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 4436	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 4852	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 4852	4424	MW3_Chair.exe	cmd.exe
PID 4436 wrote to memory of 2064	4436	cmd.exe	sc.exe
PID 4436 wrote to memory of 2064	4436	cmd.exe	sc.exe
PID 1796 wrote to memory of 2044	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 2044	1796	cmd.exe	sc.exe
PID 4424 wrote to memory of 3656	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 3656	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 2384	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 2384	4424	MW3_Chair.exe	cmd.exe
PID 2384 wrote to memory of 368	2384	cmd.exe	sc.exe
PID 2384 wrote to memory of 368	2384	cmd.exe	sc.exe
PID 4424 wrote to memory of 3140	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 3140	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 2180	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 2180	4424	MW3_Chair.exe	cmd.exe
PID 2180 wrote to memory of 680	2180	cmd.exe	sc.exe
PID 2180 wrote to memory of 680	2180	cmd.exe	sc.exe
PID 4424 wrote to memory of 2436	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 2436	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 2160	4424	MW3_Chair.exe	cmd.exe
PID 4424 wrote to memory of 2160	4424	MW3_Chair.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\MW3_Chair.exe
"C:\Users\Admin\AppData\Local\Temp\MW3_Chair.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Drops file in Drivers directory
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4424

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C sc stop iqvw64e.sys
2⤵
- Suspicious use of WriteProcessMemory
PID:1796

C:\Windows\system32\sc.exe
sc stop iqvw64e.sys
3⤵
- Launches sc.exe
PID:2044

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C sc delete iqvw64e.sys
2⤵
- Suspicious use of WriteProcessMemory
PID:4436

C:\Windows\system32\sc.exe
sc delete iqvw64e.sys
3⤵
- Launches sc.exe
PID:2064

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c cls
2⤵
PID:4852

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c cls
2⤵
PID:3656

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys
2⤵
- Suspicious use of WriteProcessMemory
PID:2384

C:\Windows\system32\sc.exe
sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys
3⤵
- Launches sc.exe
PID:368

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c cls
2⤵
PID:3140

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C sc start windowsproc
2⤵
- Suspicious use of WriteProcessMemory
PID:2180

C:\Windows\system32\sc.exe
sc start windowsproc
3⤵
- Launches sc.exe
PID:680

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c cls
2⤵
PID:2436

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c cls
2⤵
PID:2160

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

memory/4424-0-0x0000000140000000-0x0000000142290000-memory.dmp

Filesize
34.6MB

Download
memory/4424-1-0x0000000140000000-0x0000000142290000-memory.dmp

Filesize
34.6MB

Download
memory/4424-2-0x0000000140000000-0x0000000142290000-memory.dmp

Filesize
34.6MB

Download
memory/4424-3-0x0000000140000000-0x0000000142290000-memory.dmp

Filesize
34.6MB

Download
memory/4424-4-0x00007FF8ECCD0000-0x00007FF8ECCD2000-memory.dmp

Filesize
8KB

Download
memory/4424-15-0x0000000140000000-0x0000000142290000-memory.dmp

Filesize
34.6MB

Download