c4ed0c6c4546d7c623c7547eae8ff038756ab19347aae86b9ab1517566550efa

General

Target

iwcfbelmib.dll
Size

8.9MB
MD5

64407b3d50b351fb556850b5004ab591
SHA1

7ea3ed01bb26aaa7a90edd1c4fceea2de7ecebe1
SHA256

204f4aed39fc7625256f5f48812d8881c7f79b692bac0b0a484aba93205e061a
SHA512

25c0343283bb2097d135918c2eb61c8828575b4bef97a831577a321364ded073808c8588e391d681566974ef5ac192dd36ecaa4e05befddeb0b0e11833ef9e96

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
behavioral1/memory/1084-56-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-57-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-58-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-59-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-60-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-61-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-63-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-64-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-65-0x00000000022B0000-0x00000000039FD000-memory.dmp	themida
behavioral1/memory/1084-66-0x00000000022B0000-0x00000000039FD000-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

1084 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1960 1084 WerFault.exe rundll32.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

rundll32.exe

pid process

1084 rundll32.exe

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

pid	process
1084	rundll32.exe

pid	pid_target	process	target process
1960	1084	WerFault.exe	rundll32.exe

pid	process
1084	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1648 wrote to memory of 1084	1648	rundll32.exe	rundll32.exe
PID 1648 wrote to memory of 1084	1648	rundll32.exe	rundll32.exe
PID 1648 wrote to memory of 1084	1648	rundll32.exe	rundll32.exe
PID 1648 wrote to memory of 1084	1648	rundll32.exe	rundll32.exe
PID 1648 wrote to memory of 1084	1648	rundll32.exe	rundll32.exe
PID 1648 wrote to memory of 1084	1648	rundll32.exe	rundll32.exe
PID 1648 wrote to memory of 1084	1648	rundll32.exe	rundll32.exe
PID 1084 wrote to memory of 1960	1084	rundll32.exe	WerFault.exe
PID 1084 wrote to memory of 1960	1084	rundll32.exe	WerFault.exe
PID 1084 wrote to memory of 1960	1084	rundll32.exe	WerFault.exe
PID 1084 wrote to memory of 1960	1084	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\iwcfbelmib.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1648

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\iwcfbelmib.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
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1084 -s 316
3⤵
- Program crash
PID:1960

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

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Downloads

memory/1084-54-0x0000000000000000-mapping.dmp

Download
memory/1084-55-0x0000000076291000-0x0000000076293000-memory.dmp

Filesize
8KB

Download
memory/1084-56-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-57-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-58-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-59-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-60-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-62-0x0000000077670000-0x00000000777F0000-memory.dmp

Filesize
1.5MB

Download
memory/1084-61-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-63-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-64-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-65-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1084-66-0x00000000022B0000-0x00000000039FD000-memory.dmp

Filesize
23.3MB

Download
memory/1960-67-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads