ed559a10445c3164906a6ebc17be34777573acd50051c0d34b07861a401f6397

Analysis

max time kernel
95s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
01/10/2024, 20:00

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General

Target

wumcache64.dll
Size

8.8MB
MD5

6622504c5975db3515d31c9fcff72caf
SHA1

40ac5307524f1147813892d371683774efacbf89
SHA256

ed559a10445c3164906a6ebc17be34777573acd50051c0d34b07861a401f6397
SHA512

2e81d80c9041d4804553749c823fbc7eac92d38bea237069def2d80f4cb22548717c77e7054440272b7c58e6a9aa1f8645ed4360c58db64d15466e2339314eac
SSDEEP

196608:FQQqj3aDAbZf06wKTSlTbk419WLtHdpoyA6sMurngJQd+eu9z:Fvq5Zf06wK2hb31QLtHDlfsMurn1t+z

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

Themida packer 8 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/1936-0-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp	themida
behavioral2/memory/1936-2-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp	themida
behavioral2/memory/1936-3-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp	themida
behavioral2/memory/1936-4-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp	themida
behavioral2/memory/1936-5-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp	themida
behavioral2/memory/1936-6-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp	themida
behavioral2/memory/1936-7-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp	themida
behavioral2/memory/1936-8-0x00007FF95F530000-0x00007FF960CCD000-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
1936	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1936	rundll32.exe
1936	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\wumcache64.dll,#1
1⤵
- 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:1936

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/1936-0-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp

Filesize
23.6MB

Download
memory/1936-1-0x00007FF97E430000-0x00007FF97E432000-memory.dmp

Filesize
8KB

Download
memory/1936-2-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp

Filesize
23.6MB

Download
memory/1936-3-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp

Filesize
23.6MB

Download
memory/1936-4-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp

Filesize
23.6MB

Download
memory/1936-5-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp

Filesize
23.6MB

Download
memory/1936-6-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp

Filesize
23.6MB

Download
memory/1936-7-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp

Filesize
23.6MB

Download
memory/1936-8-0x00007FF95F530000-0x00007FF960CCD000-memory.dmp

Filesize
23.6MB

Download