6327fb3da7680c014e9910fa8d1c012dbc677a2aa487c3ac996079408be7d10b

General

Target

fbo3xfp9z41vwe0tzc0jd.dll
Size

8.5MB
MD5

ceb7d86b25278e2d828955a398de923c
SHA1

21bf41eb81548d5e97ca6e8780f669eb00860d28
SHA256

f1f0291aed00e8a997b0e8812f4757abdbd9ba85fd5e98f212b183c9f9c0e849
SHA512

7147a8d8d91319b0f1f82043441efe0b2ec4f55fa6ed3cce22851a43f0a3b0a434e41bf5c53b2cd8bbb089bff88c7269d9d1faa2a023308296a5076dd6441274

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
behavioral3/memory/1836-57-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-58-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-59-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-60-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-61-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-62-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-63-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-64-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-65-0x0000000001E60000-0x000000000348C000-memory.dmp	themida
behavioral3/memory/1836-66-0x0000000001E60000-0x000000000348C000-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

1836 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1772 1836 WerFault.exe rundll32.exe

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

pid	process
1836	rundll32.exe

pid	pid_target	process	target process
1772	1836	WerFault.exe	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1092 wrote to memory of 1836	1092	rundll32.exe	rundll32.exe
PID 1092 wrote to memory of 1836	1092	rundll32.exe	rundll32.exe
PID 1092 wrote to memory of 1836	1092	rundll32.exe	rundll32.exe
PID 1092 wrote to memory of 1836	1092	rundll32.exe	rundll32.exe
PID 1092 wrote to memory of 1836	1092	rundll32.exe	rundll32.exe
PID 1092 wrote to memory of 1836	1092	rundll32.exe	rundll32.exe
PID 1092 wrote to memory of 1836	1092	rundll32.exe	rundll32.exe
PID 1836 wrote to memory of 1772	1836	rundll32.exe	WerFault.exe
PID 1836 wrote to memory of 1772	1836	rundll32.exe	WerFault.exe
PID 1836 wrote to memory of 1772	1836	rundll32.exe	WerFault.exe
PID 1836 wrote to memory of 1772	1836	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fbo3xfp9z41vwe0tzc0jd.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1092

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fbo3xfp9z41vwe0tzc0jd.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 use of WriteProcessMemory
PID:1836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 316
3⤵
- Program crash
PID:1772

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/1772-68-0x0000000000000000-mapping.dmp

Download
memory/1836-60-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-62-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-57-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-58-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-59-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-54-0x0000000000000000-mapping.dmp

Download
memory/1836-61-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-56-0x00000000778B0000-0x0000000077A30000-memory.dmp

Filesize
1.5MB

Download
memory/1836-63-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-64-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-65-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-66-0x0000000001E60000-0x000000000348C000-memory.dmp

Filesize
22.2MB

Download
memory/1836-67-0x00000000778B0000-0x0000000077A30000-memory.dmp

Filesize
1.5MB

Download
memory/1836-55-0x0000000075F61000-0x0000000075F63000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads