b98b48cf4608062b3e8e9b21dbef7a611964f643ff4d1ae171210b1f1dcb6c32

Analysis

max time kernel
144s
max time network
165s
platform
windows10_x64
resource
win10-en-20211208
submitted
30-01-2022 16:55

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General

Target

b98b48cf4608062b3e8e9b21dbef7a611964f643ff4d1ae171210b1f1dcb6c32.dll
Size

7.3MB
MD5

bdc354506d6c018b52cb92a9d91f5f7c
SHA1

88ff2164555f2adef59819720c63ea1fb3089617
SHA256

b98b48cf4608062b3e8e9b21dbef7a611964f643ff4d1ae171210b1f1dcb6c32
SHA512

dfbf3d0c5bdbd042a6285cdc8837f0802fa6f0ae0d85dd8cfbd510d3e6c0de27f5da0312102d7a362f13c046172ba3978ddd91d28642fa7519b19656b4bc99d4

Score

9^/10

evasion themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

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 1 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/3380-124-0x00007FFBF0A70000-0x00007FFBF1FCD000-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

3380 rundll32.exe

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

pid	process
3380	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b98b48cf4608062b3e8e9b21dbef7a611964f643ff4d1ae171210b1f1dcb6c32.dll,#1
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:3380

MITRE ATT&CK Matrix ATT&CK v6

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

Replay Monitor

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Downloads

memory/3380-124-0x00007FFBF0A70000-0x00007FFBF1FCD000-memory.dmp

Filesize
21.4MB

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