4116562a1ee0fa7fc1119971b1c73afca0bb4e45104948d3b61303fbbab64660

General

Target

taskhostw.exe
Size

44.5MB
MD5

c80de2166e297418ceac6dd1e3733f09
SHA1

e4bd7d38e3dc7ca0d9b85d2b20b7a9f012ea1a82
SHA256

4116562a1ee0fa7fc1119971b1c73afca0bb4e45104948d3b61303fbbab64660
SHA512

27a85b4e16953fc83160cc76557855624e1780ac62aeae46d98a6b0a117772122c60e08d707ed29ad6e2d7a66f47eec45abc03634efd5cf555834df423866f85
SSDEEP

786432:cgJ9RzMFawRf0ac415LIzsW0w/+bm+5qGwMEeBkmM3g6F388qkEfEs8Ne7Ctwy:cGMYO+4hw/+r03MEeBNIT388va5WWy

Score

9^/10

evasion 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:

taskhostw.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ taskhostw.exe
Drops file in Drivers directory 1 IoCs

Processes:

taskhostw.exe

description ioc process

File opened for modification C:\Windows\System32\drivers\etc\hosts taskhostw.exe

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

description	ioc	process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	taskhostw.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:

taskhostw.exe

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

Themida packer 9 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/2512-132-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida
behavioral2/memory/2512-134-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida
behavioral2/memory/2512-135-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida
behavioral2/memory/2512-136-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida
behavioral2/memory/2512-137-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida
behavioral2/memory/2512-138-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida
behavioral2/memory/2512-139-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida
behavioral2/memory/2512-140-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida
behavioral2/memory/2512-141-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	themida

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

taskhostw.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	taskhostw.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio = "C:\\ProgramData\\RealtekHD\\taskhostw.exe"	taskhostw.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

taskhostw.exe

description ioc process

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

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

AutoIT Executable 7 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/memory/2512-135-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	autoit_exe
behavioral2/memory/2512-136-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	autoit_exe
behavioral2/memory/2512-137-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	autoit_exe
behavioral2/memory/2512-138-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	autoit_exe
behavioral2/memory/2512-139-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	autoit_exe
behavioral2/memory/2512-140-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	autoit_exe
behavioral2/memory/2512-141-0x00007FF704520000-0x00007FF707A8D000-memory.dmp	autoit_exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

taskhostw.exe

pid process

2512 taskhostw.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

taskhostw.exe

pid	process
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe
2512	taskhostw.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

taskhostw.exe

pid process

2512 taskhostw.exe

C:\Users\Admin\AppData\Local\Temp\taskhostw.exe
"C:\Users\Admin\AppData\Local\Temp\taskhostw.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Drops file in Drivers directory
- Checks BIOS information in registry
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
PID:2512

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2512-132-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-133-0x00007FFA04210000-0x00007FFA04405000-memory.dmp

Filesize
2.0MB

Download
memory/2512-134-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-135-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-136-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-137-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-138-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-139-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-140-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-141-0x00007FF704520000-0x00007FF707A8D000-memory.dmp

Filesize
53.4MB

Download
memory/2512-142-0x00007FFA04210000-0x00007FFA04405000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads