501c9cdf21d2e7d3816efb23747686aec989b9f987281113aa5416bef627dbaf

Analysis

max time kernel
5s
max time network
47s
platform
windows7_x64
resource
win7-20220414-en
submitted
20-05-2022 04:32

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General

Target

NativeDecompress.dll
Size

1.2MB
MD5

84b679ddb4975de2d2fc0e1a37042ac5
SHA1

5e80e5df5514ce5603578c738a63210ef4c2f55e
SHA256

64284f7cddd51086946191dbaaf1d23869b99ef47892f250682c2d568aa874f5
SHA512

3c574ed06b7d798c1f92dad6019ee510b660fcb2267f91528cfcc94c96a003f55504d534aaea694baa87a21665c8c180e4e1ad5735041a779336f2996062ec2a

Score

9^/10

evasion 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 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Wine rundll32.exe
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

rundll32.exe

pid process

912 rundll32.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

rundll32.exe

pid process

912 rundll32.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Wine	rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	rundll32.exe

pid	process
912	rundll32.exe

pid	process
912	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1724 wrote to memory of 912	1724	rundll32.exe	rundll32.exe
PID 1724 wrote to memory of 912	1724	rundll32.exe	rundll32.exe
PID 1724 wrote to memory of 912	1724	rundll32.exe	rundll32.exe
PID 1724 wrote to memory of 912	1724	rundll32.exe	rundll32.exe
PID 1724 wrote to memory of 912	1724	rundll32.exe	rundll32.exe
PID 1724 wrote to memory of 912	1724	rundll32.exe	rundll32.exe
PID 1724 wrote to memory of 912	1724	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\NativeDecompress.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1724

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\NativeDecompress.dll,#1
2⤵
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:912

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

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/912-54-0x0000000000000000-mapping.dmp

Download
memory/912-55-0x00000000752B1000-0x00000000752B3000-memory.dmp

Filesize
8KB

Download
memory/912-56-0x0000000076F70000-0x00000000770F0000-memory.dmp

Filesize
1.5MB

Download