systembc | 10f2b39f63da35827e667f29e2b69524079e06e454160dee4c28636fffcce199

Analysis

max time kernel
141s
max time network
133s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
30-06-2023 11:24

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General

Target

10f2b39f63da35827e667f29e.dll
Size

3.7MB
MD5

0168ca4a89a13c8b48f97edcd8c32165
SHA1

8f7c8396abe6dc8cf3d96dcefdcb208bebdc2852
SHA256

10f2b39f63da35827e667f29e2b69524079e06e454160dee4c28636fffcce199
SHA512

c6e273f86f177d8b6b45de6b1969e8e88a708a1f86dc318f870cf6c011fd275503aeba5ab8e37dda85a407449c2ca0921bc9b3b586ab43f8afda946f481119ed
SSDEEP

49152:jjjH4ZOXhVNeJBCDRTJ+j6ErUCBOU9EUSqVLsGC8egyQVTlFvqCBfZKQO9NPe5Ie:l8BcNYjnJLnC8egyQVPNZwL

Score

10^/10

systembc evasion themida trojan

Malware Config

Extracted

Family

systembc

5.42.65.67:4298

localhost.exchange:4298

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
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
Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

1 1620 rundll32.exe
3 1620 rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.exe

flow	pid	process
1	1620	rundll32.exe
3	1620	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\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/1620-55-0x000007FEF6560000-0x000007FEF6921000-memory.dmp	themida
behavioral1/memory/1620-57-0x000007FEF6560000-0x000007FEF6921000-memory.dmp	themida
behavioral1/memory/1620-63-0x000007FEF6560000-0x000007FEF6921000-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

1620 rundll32.exe

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

pid	process
1620	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\10f2b39f63da35827e667f29e.dll,#1
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Blocklisted process makes network request
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:1620

Network

MITRE ATT&CK Enterprise v6

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/1620-54-0x000007FEF6930000-0x000007FEF6CF1000-memory.dmp

Filesize
3.8MB

Download
memory/1620-55-0x000007FEF6560000-0x000007FEF6921000-memory.dmp

Filesize
3.8MB

Download
memory/1620-57-0x000007FEF6560000-0x000007FEF6921000-memory.dmp

Filesize
3.8MB

Download
memory/1620-63-0x000007FEF6560000-0x000007FEF6921000-memory.dmp

Filesize
3.8MB

Download