systembc | 3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945

General

Target

3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe
Size

684.8MB
MD5

cffbeaff6728b94b1157790a0da8c0e0
SHA1

f739e01d798ee1f1c8802daf661fe22a2dc6cb85
SHA256

3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945
SHA512

afdcc11c9fff4cca1d14d326d4728b3032617b62c2b9ad788b2e78383831cc0240ce0bf428b43e17ef0cb222ccacc99f58ab8b1e9c77804bcaf9bc0033375b76
SSDEEP

98304:G9J/BDT4RZr3mc9UUxFKzxx+SjEnodrlW3hvIroVj0Rdfay6cysWtrW4L:e/9Y3n9UiFe+SWodrlW3HVURp7Wtas

Score

10^/10

systembc evasion persistence themida trojan

Malware Config

Extracted

Family

systembc

C2

178.20.44.196:4127

192.168.1.149:4127

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Systembc family
systembc

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/3120-9-0x00000000005E0000-0x000000000110C000-memory.dmp	themida
behavioral2/memory/3120-10-0x00000000005E0000-0x000000000110C000-memory.dmp	themida
behavioral2/memory/3120-18-0x00000000005E0000-0x000000000110C000-memory.dmp	themida

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\10A388C770904F49A3DDF65BDF6A1F1D = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe\""	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3120 set thread context of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe
3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe
3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe
3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3120 wrote to memory of 4008	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	83
PID 3120 wrote to memory of 4008	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	83
PID 3120 wrote to memory of 4008	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	83
PID 3120 wrote to memory of 3452	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	84
PID 3120 wrote to memory of 3452	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	84
PID 3120 wrote to memory of 3452	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	84
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85
PID 3120 wrote to memory of 3776	3120	3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe	85

C:\Users\Admin\AppData\Local\Temp\3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe
"C:\Users\Admin\AppData\Local\Temp\3a48bb3fcdd6733462d837d755c7f09f90399d57364bae905f130009112a8945.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3120
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:4008
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:3452
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:3776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3120-9-0x00000000005E0000-0x000000000110C000-memory.dmp

Filesize
11.2MB

Download
memory/3120-7-0x00007FFA2C024000-0x00007FFA2C025000-memory.dmp

Filesize
4KB

Download
memory/3120-2-0x00007FFA2BFC0000-0x00007FFA2C289000-memory.dmp

Filesize
2.8MB

Download
memory/3120-4-0x00007FFA2BFC0000-0x00007FFA2C289000-memory.dmp

Filesize
2.8MB

Download
memory/3120-0-0x00000000005E0000-0x000000000110C000-memory.dmp

Filesize
11.2MB

Download
memory/3120-5-0x00000000005E0000-0x000000000110C000-memory.dmp

Filesize
11.2MB

Download
memory/3120-1-0x00007FFA2C024000-0x00007FFA2C025000-memory.dmp

Filesize
4KB

Download
memory/3120-8-0x00007FFA2BFC0000-0x00007FFA2C289000-memory.dmp

Filesize
2.8MB

Download
memory/3120-6-0x00007FFA2BFC0000-0x00007FFA2C289000-memory.dmp

Filesize
2.8MB

Download
memory/3120-10-0x00000000005E0000-0x000000000110C000-memory.dmp

Filesize
11.2MB

Download
memory/3120-11-0x00007FFA2BFC0000-0x00007FFA2C289000-memory.dmp

Filesize
2.8MB

Download
memory/3120-12-0x000001F90D850000-0x000001F90D896000-memory.dmp

Filesize
280KB

Download
memory/3120-19-0x00007FFA2BFC0000-0x00007FFA2C289000-memory.dmp

Filesize
2.8MB

Download
memory/3120-18-0x00000000005E0000-0x000000000110C000-memory.dmp

Filesize
11.2MB

Download
memory/3776-16-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/3776-13-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads