2cea1385ca83dbc79de55e3aca99f02f2f10a46122956d27346bac0cd23dbc76

General

Target

nbigdxqqfu.dll
Size

8.4MB
MD5

3a2ba549d59aa944f20df5dbbc70827c
SHA1

b6f0863186b3dee82abdd2806a7313645d4908fc
SHA256

2cea1385ca83dbc79de55e3aca99f02f2f10a46122956d27346bac0cd23dbc76
SHA512

c9c4cad12a64969c5ca678b7d3b328fe1d7ff1e3866daf86f5720ed864169f4660c4143bbc84206bd8a64cc2db1327b094e6d87683bb06702e87c9c87e6f8639

Score

9^/10

evasion 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:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.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:

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

Themida packer 10 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/4168-132-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-133-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-134-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-135-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-136-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-137-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-138-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-139-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-140-0x0000000002C00000-0x000000000421A000-memory.dmp	themida
behavioral2/memory/4168-141-0x0000000002C00000-0x000000000421A000-memory.dmp	themida

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

4168 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3236 4168 WerFault.exe rundll32.exe

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

pid	process
4168	rundll32.exe

pid	pid_target	process	target process
3236	4168	WerFault.exe	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 3136 wrote to memory of 4168	3136	rundll32.exe	rundll32.exe
PID 3136 wrote to memory of 4168	3136	rundll32.exe	rundll32.exe
PID 3136 wrote to memory of 4168	3136	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\nbigdxqqfu.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3136

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\nbigdxqqfu.dll,#1
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:4168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4168 -s 756
3⤵
- Program crash
PID:3236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4168 -ip 4168
1⤵
PID:3328

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

Virtualization/Sandbox Evasion

1

T1497

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/4168-130-0x0000000000000000-mapping.dmp

Download
memory/4168-131-0x0000000077130000-0x00000000772D3000-memory.dmp

Filesize
1.6MB

Download
memory/4168-132-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-133-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-134-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-135-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-136-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-137-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-138-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-139-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-140-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-141-0x0000000002C00000-0x000000000421A000-memory.dmp

Filesize
22.1MB

Download
memory/4168-142-0x0000000077130000-0x00000000772D3000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads