systembc | f8d015ac4faff5d7a5da0e95f3cc9e9eb18417cd749b3b4625b5312910a25b7b

Analysis

max time kernel
300s
max time network
265s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
25-07-2023 01:10

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General

Target

f8d015ac4faff5d7a5da0e95f3cc9e9eb18417cd749b3b4625b5312910a25b7b.dll
Size

3.5MB
MD5

f40e1a15f93696510e5faef3a216f18f
SHA1

6d353491cc7f32bcf9211c7dc1a5b7149e4ebf9a
SHA256

f8d015ac4faff5d7a5da0e95f3cc9e9eb18417cd749b3b4625b5312910a25b7b
SHA512

5b20529fc6ee3731382d48cf2db7dce8bae0ba753314e8bed07ba993c1ae891134385df7f4ffd7ee62e0b1b6618bfb209b27fac3fdbe88a60b1375747fefe2b2
SSDEEP

49152:T+y6I9edJ9qu8moH+xNSJJ1LKz+JsK47C:L69RyLqe

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

2 2524 rundll32.exe
3 2524 rundll32.exe

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

flow	pid	process
2	2524	rundll32.exe
3	2524	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 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/2524-54-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp	themida
behavioral1/memory/2524-56-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp	themida
behavioral1/memory/2524-60-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp	themida
behavioral1/memory/2524-78-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp	themida
behavioral1/memory/2524-79-0x000007FEF5360000-0x000007FEF56ED000-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

2524 rundll32.exe

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

pid	process
2524	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f8d015ac4faff5d7a5da0e95f3cc9e9eb18417cd749b3b4625b5312910a25b7b.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:2524

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

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Downloads

memory/2524-53-0x000007FEF56F0000-0x000007FEF5A7D000-memory.dmp

Filesize
3.6MB

Download
memory/2524-54-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp

Filesize
3.6MB

Download
memory/2524-55-0x000007FEF56F0000-0x000007FEF5A7D000-memory.dmp

Filesize
3.6MB

Download
memory/2524-56-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp

Filesize
3.6MB

Download
memory/2524-57-0x0000000076D60000-0x0000000076F09000-memory.dmp

Filesize
1.7MB

Download
memory/2524-59-0x000007FEF56F0000-0x000007FEF5A7D000-memory.dmp

Filesize
3.6MB

Download
memory/2524-60-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp

Filesize
3.6MB

Download
memory/2524-78-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp

Filesize
3.6MB

Download
memory/2524-79-0x000007FEF5360000-0x000007FEF56ED000-memory.dmp

Filesize
3.6MB

Download