2b3aa9f8d949be0919837b8f00c79700c0db437a6a8f042fcff2ec4b2c03c584

Analysis

max time kernel
133s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 01:15

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General

Target

DRCom.dll
Size

2.8MB
MD5

3c8493c81b10ccb36a153cb7b4a6e6d7
SHA1

8834fed8a9595f35e86c6b39eb2993b85041344e
SHA256

ac8353cad0c254f179eaa67eec12392da4847931f2d8f4bddfcf732d5eabd77c
SHA512

ae057e71e0ae0dcb55cc8cac44fa9af986a11d4e8b6eec293ad061685f3f52d930d5746f32b42f0e601359c117a94f37e6529f336293a429ba2a51b8c62569ed
SSDEEP

49152:82TB73A+tsF0cPhBQqOwzuWJgNmVc5l9+YW9FXtJi0b5cHU50Qsh/:84R6qcPJuNmVMYYO3Ji0b5cH407h/

Score

9^/10

evasion themida trojan

Malware Config

Signatures

Detects executables packed with Themida 4 IoCs

Processes:

resource	yara_rule
behavioral8/memory/4236-0-0x0000000010000000-0x000000001071C000-memory.dmp	INDICATOR_EXE_Packed_Themida
behavioral8/memory/4236-3-0x0000000010000000-0x000000001071C000-memory.dmp	INDICATOR_EXE_Packed_Themida
behavioral8/memory/4236-2-0x0000000010000000-0x000000001071C000-memory.dmp	INDICATOR_EXE_Packed_Themida
behavioral8/memory/4236-4-0x0000000010000000-0x000000001071C000-memory.dmp	INDICATOR_EXE_Packed_Themida

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

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral8/memory/4236-0-0x0000000010000000-0x000000001071C000-memory.dmp	themida
behavioral8/memory/4236-3-0x0000000010000000-0x000000001071C000-memory.dmp	themida
behavioral8/memory/4236-2-0x0000000010000000-0x000000001071C000-memory.dmp	themida
behavioral8/memory/4236-4-0x0000000010000000-0x000000001071C000-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

4236 rundll32.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

4236 rundll32.exe
4236 rundll32.exe

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

pid	process
4236	rundll32.exe

pid	process
4236	rundll32.exe
4236	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 3712 wrote to memory of 4236	3712	rundll32.exe	rundll32.exe
PID 3712 wrote to memory of 4236	3712	rundll32.exe	rundll32.exe
PID 3712 wrote to memory of 4236	3712	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\DRCom.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3712

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\DRCom.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:4236

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4240,i,13544508926340531097,6671217806016090640,262144 --variations-seed-version --mojo-platform-channel-handle=1280 /prefetch:8
1⤵
PID:2516

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/4236-0-0x0000000010000000-0x000000001071C000-memory.dmp

Filesize
7.1MB

Download
memory/4236-1-0x00000000774F4000-0x00000000774F6000-memory.dmp

Filesize
8KB

Download
memory/4236-3-0x0000000010000000-0x000000001071C000-memory.dmp

Filesize
7.1MB

Download
memory/4236-2-0x0000000010000000-0x000000001071C000-memory.dmp

Filesize
7.1MB

Download
memory/4236-4-0x0000000010000000-0x000000001071C000-memory.dmp

Filesize
7.1MB

Download