a437e8f5a8b527d11fff3d7ae9ed756f9ac624872c79c8965b67698a84e3db91

Analysis

max time kernel
123s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20231025-en
resource tags

arch:x64arch:x86image:win10v2004-20231025-enlocale:en-usos:windows10-2004-x64system
submitted
21/11/2023, 16:01

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General

Target

a437e8f5a8b527d11fff3d7ae9ed756f9ac624872c79c8965b67698a84e3db91.dll
Size

3.0MB
MD5

0e8ba274a45d4aaad9e96cb164e89a3f
SHA1

adad1ed76d8c02d976867dfb1a77c09a90c4f311
SHA256

a437e8f5a8b527d11fff3d7ae9ed756f9ac624872c79c8965b67698a84e3db91
SHA512

ba8bd437d68ce9871f61bc900cc85992eb01d5b7d7cc364254a70bfeb89a2435c6d8cf22d0e8102b5203bf64b66a5fc6e900fd06eb04d91712beb520bb5531bf
SSDEEP

49152:YQSd2hpBVepYwD070F68mpbSPN7Ayq/BaIE38T08CcK+2imXlyLc6ZHTt81+dd:Wd2htei0E8bVyBaTw0OUXp6ZHTtL

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

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

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 11 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/2148-0-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-2-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-3-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-4-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-5-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-6-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-7-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-8-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-9-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-10-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida
behavioral2/memory/2148-11-0x0000000074A00000-0x00000000751DB000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2148	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3344	2148	WerFault.exe	86

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2148	rundll32.exe
2148	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 524 wrote to memory of 2148	524	rundll32.exe	86
PID 524 wrote to memory of 2148	524	rundll32.exe	86
PID 524 wrote to memory of 2148	524	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a437e8f5a8b527d11fff3d7ae9ed756f9ac624872c79c8965b67698a84e3db91.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:524
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a437e8f5a8b527d11fff3d7ae9ed756f9ac624872c79c8965b67698a84e3db91.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
  PID:2148
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2148 -s 700
    3⤵
    - Program crash
    PID:3344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2148 -ip 2148
1⤵
PID:2276

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2148-0-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-1-0x0000000077774000-0x0000000077776000-memory.dmp

Filesize
8KB

Download
memory/2148-2-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-3-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-4-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-5-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-6-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-7-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-8-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-9-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-10-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download
memory/2148-11-0x0000000074A00000-0x00000000751DB000-memory.dmp

Filesize
7.9MB

Download