a71b3f06bf87b40b1559fa1d5a8cc3eab4217f317858bce823dd36302412dabc

Analysis

max time kernel
30s
max time network
46s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 19:23

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General

Target

a71b3f06bf87b40b1559fa1d5a8cc3eab4217f317858bce823dd36302412dabc.dll
Size

2.4MB
MD5

152cade991b94b41ab0259fcc4e49339
SHA1

750372151b2c9b739701916d2f24b7b017e2107e
SHA256

a71b3f06bf87b40b1559fa1d5a8cc3eab4217f317858bce823dd36302412dabc
SHA512

c250dd3b5e81cd0fda01a4fd3ee9a716a0d6869406a9d9069ac4e5f090f48c5bb8ac88f85c26d66e4e76c34c61d07da36237257622e83b5aed84f74101b3c89d

Score

9^/10

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

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

976 rundll32.exe

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

pid	process
976	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 916 wrote to memory of 976	916	rundll32.exe	rundll32.exe
PID 916 wrote to memory of 976	916	rundll32.exe	rundll32.exe
PID 916 wrote to memory of 976	916	rundll32.exe	rundll32.exe
PID 916 wrote to memory of 976	916	rundll32.exe	rundll32.exe
PID 916 wrote to memory of 976	916	rundll32.exe	rundll32.exe
PID 916 wrote to memory of 976	916	rundll32.exe	rundll32.exe
PID 916 wrote to memory of 976	916	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a71b3f06bf87b40b1559fa1d5a8cc3eab4217f317858bce823dd36302412dabc.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:916

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a71b3f06bf87b40b1559fa1d5a8cc3eab4217f317858bce823dd36302412dabc.dll,#1
2⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:976

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/976-54-0x0000000000000000-mapping.dmp

Download
memory/976-55-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

Filesize
8KB

Download
memory/976-56-0x0000000010001000-0x0000000010005000-memory.dmp

Filesize
16KB

Download
memory/976-57-0x00000000779A0000-0x0000000077B20000-memory.dmp

Filesize
1.5MB

Download