systembc | 6843226fd84ae2ce783119d4ba634e00d10dc6e5374a23d26b42cd0e7e6b18cd

Analysis

max time kernel
73s
max time network
136s
platform
windows10_x64
resource
win10v20210408
submitted
24/06/2021, 01:42

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General

Target
36b9570a14ac21869cad456713714940.exe
Size 144KB
Sample210624-ebxa3dkb7n
SHA256 6843226fd84ae2ce783119d4ba634e00d10dc6e5374a23d26b42cd0e7e6b18cd
MD5 36b9570a14ac21869cad456713714940
SHA1 17ce33e58167a089b7e4e6c49a362a23364d30de
SHA512 4af43e89ca22fd81365f6e68a1350400cc653d3d12e642ed04bceb1597be9ce89f857c851b14390b3aad3c8b89d69235cad20b8c30a8d93b74b93f6339393bd9
MD5 SHA1 SHA512

Score

10^/10

systembc evasion persistence spyware stealer trojan

Malware Config

Extracted

Family

systembc

65.21.93.53:4173
95.216.118.223:4173

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Turns off Windows Defender SpyNet reporting 2 TTPs
evasion

Disabling Security Tools
T1089

Modify Registry
T1112
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/files/0x000700000001ab26-121.dat	Nirsoft
behavioral2/files/0x000700000001ab26-122.dat	Nirsoft
behavioral2/files/0x000700000001ab26-124.dat	Nirsoft

Blocklisted process makes network request 1 IoCs

flow	pid	Process
22	4624	rundll32.exe

Executes dropped EXE 3 IoCs

pid	Process
3836	AdvancedRun.exe
2912	AdvancedRun.exe
4548	client.exe

Loads dropped DLL 1 IoCs

pid	Process
4624	rundll32.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Windows security modification 2 TTPs 10 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths	36b9570a14ac21869cad456713714940.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions	36b9570a14ac21869cad456713714940.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\36b9570a14ac21869cad456713714940.exe = "0"	36b9570a14ac21869cad456713714940.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Spynet\SpyNetReporting = "0"	36b9570a14ac21869cad456713714940.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	36b9570a14ac21869cad456713714940.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Real-Time Protection	36b9570a14ac21869cad456713714940.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	36b9570a14ac21869cad456713714940.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Spynet	36b9570a14ac21869cad456713714940.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Spynet\SubmitSamplesConsent = "0"	36b9570a14ac21869cad456713714940.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	36b9570a14ac21869cad456713714940.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\ProtectIT = "C:\\Windows\\System32\\rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\valid.sa, rundll"	client.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 16 IoCs

pid	Process
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 776 set thread context of 2188	776	36b9570a14ac21869cad456713714940.exe	86

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	WerFault.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3676	776	WerFault.exe	67
4580	2188	WerFault.exe	86

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3748	timeout.exe

Suspicious behavior: EnumeratesProcesses 54 IoCs

pid	Process
3836	AdvancedRun.exe
3836	AdvancedRun.exe
3836	AdvancedRun.exe
3836	AdvancedRun.exe
2912	AdvancedRun.exe
2912	AdvancedRun.exe
2912	AdvancedRun.exe
2912	AdvancedRun.exe
4048	powershell.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
776	36b9570a14ac21869cad456713714940.exe
4048	powershell.exe
3680	powershell.exe
3828	powershell.exe
2924	powershell.exe
4048	powershell.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3676	WerFault.exe
3680	powershell.exe
3828	powershell.exe
2924	powershell.exe
3680	powershell.exe
3828	powershell.exe
2924	powershell.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe
4580	WerFault.exe

Suspicious use of AdjustPrivilegeToken 16 IoCs

description	pid	Process
Token: SeDebugPrivilege	776	36b9570a14ac21869cad456713714940.exe
Token: SeDebugPrivilege	3836	AdvancedRun.exe
Token: SeImpersonatePrivilege	3836	AdvancedRun.exe
Token: SeDebugPrivilege	2912	AdvancedRun.exe
Token: SeImpersonatePrivilege	2912	AdvancedRun.exe
Token: SeDebugPrivilege	4048	powershell.exe
Token: SeDebugPrivilege	3680	powershell.exe
Token: SeDebugPrivilege	3828	powershell.exe
Token: SeDebugPrivilege	2924	powershell.exe
Token: SeRestorePrivilege	3676	WerFault.exe
Token: SeBackupPrivilege	3676	WerFault.exe
Token: SeBackupPrivilege	3676	WerFault.exe
Token: SeDebugPrivilege	3676	WerFault.exe
Token: SeDebugPrivilege	2188	36b9570a14ac21869cad456713714940.exe
Token: SeDebugPrivilege	2188	36b9570a14ac21869cad456713714940.exe
Token: SeDebugPrivilege	4580	WerFault.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 776 wrote to memory of 3836	776	36b9570a14ac21869cad456713714940.exe	78
PID 776 wrote to memory of 3836	776	36b9570a14ac21869cad456713714940.exe	78
PID 776 wrote to memory of 3836	776	36b9570a14ac21869cad456713714940.exe	78
PID 3836 wrote to memory of 2912	3836	AdvancedRun.exe	79
PID 3836 wrote to memory of 2912	3836	AdvancedRun.exe	79
PID 3836 wrote to memory of 2912	3836	AdvancedRun.exe	79
PID 776 wrote to memory of 4048	776	36b9570a14ac21869cad456713714940.exe	81
PID 776 wrote to memory of 4048	776	36b9570a14ac21869cad456713714940.exe	81
PID 776 wrote to memory of 4048	776	36b9570a14ac21869cad456713714940.exe	81
PID 776 wrote to memory of 352	776	36b9570a14ac21869cad456713714940.exe	83
PID 776 wrote to memory of 352	776	36b9570a14ac21869cad456713714940.exe	83
PID 776 wrote to memory of 352	776	36b9570a14ac21869cad456713714940.exe	83
PID 352 wrote to memory of 3748	352	cmd.exe	85
PID 352 wrote to memory of 3748	352	cmd.exe	85
PID 352 wrote to memory of 3748	352	cmd.exe	85
PID 776 wrote to memory of 2188	776	36b9570a14ac21869cad456713714940.exe	86
PID 776 wrote to memory of 2188	776	36b9570a14ac21869cad456713714940.exe	86
PID 776 wrote to memory of 2188	776	36b9570a14ac21869cad456713714940.exe	86
PID 776 wrote to memory of 2188	776	36b9570a14ac21869cad456713714940.exe	86
PID 776 wrote to memory of 2188	776	36b9570a14ac21869cad456713714940.exe	86
PID 776 wrote to memory of 2188	776	36b9570a14ac21869cad456713714940.exe	86
PID 776 wrote to memory of 2188	776	36b9570a14ac21869cad456713714940.exe	86
PID 776 wrote to memory of 2188	776	36b9570a14ac21869cad456713714940.exe	86
PID 2188 wrote to memory of 3680	2188	36b9570a14ac21869cad456713714940.exe	87
PID 2188 wrote to memory of 3680	2188	36b9570a14ac21869cad456713714940.exe	87
PID 2188 wrote to memory of 3680	2188	36b9570a14ac21869cad456713714940.exe	87
PID 2188 wrote to memory of 2924	2188	36b9570a14ac21869cad456713714940.exe	88
PID 2188 wrote to memory of 2924	2188	36b9570a14ac21869cad456713714940.exe	88
PID 2188 wrote to memory of 2924	2188	36b9570a14ac21869cad456713714940.exe	88
PID 2188 wrote to memory of 3828	2188	36b9570a14ac21869cad456713714940.exe	90
PID 2188 wrote to memory of 3828	2188	36b9570a14ac21869cad456713714940.exe	90
PID 2188 wrote to memory of 3828	2188	36b9570a14ac21869cad456713714940.exe	90
PID 2188 wrote to memory of 4548	2188	36b9570a14ac21869cad456713714940.exe	95
PID 2188 wrote to memory of 4548	2188	36b9570a14ac21869cad456713714940.exe	95
PID 2188 wrote to memory of 4548	2188	36b9570a14ac21869cad456713714940.exe	95
PID 4548 wrote to memory of 4624	4548	client.exe	97
PID 4548 wrote to memory of 4624	4548	client.exe	97
PID 4548 wrote to memory of 4624	4548	client.exe	97
PID 4548 wrote to memory of 4636	4548	client.exe	98
PID 4548 wrote to memory of 4636	4548	client.exe	98
PID 4548 wrote to memory of 4636	4548	client.exe	98

C:\Users\Admin\AppData\Local\Temp\36b9570a14ac21869cad456713714940.exe
"C:\Users\Admin\AppData\Local\Temp\36b9570a14ac21869cad456713714940.exe"
1⤵
- Windows security modification
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:776
- C:\Users\Admin\AppData\Local\Temp\049f8cc0-8ef1-4916-9e3a-494793513e27\AdvancedRun.exe
  "C:\Users\Admin\AppData\Local\Temp\049f8cc0-8ef1-4916-9e3a-494793513e27\AdvancedRun.exe" /EXEFilename "C:\Users\Admin\AppData\Local\Temp\049f8cc0-8ef1-4916-9e3a-494793513e27\test.bat" /WindowState ""0"" /PriorityClass ""32"" /CommandLine "" /StartDirectory "" /RunAs 8 /Run
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3836
- - C:\Users\Admin\AppData\Local\Temp\049f8cc0-8ef1-4916-9e3a-494793513e27\AdvancedRun.exe
    "C:\Users\Admin\AppData\Local\Temp\049f8cc0-8ef1-4916-9e3a-494793513e27\AdvancedRun.exe" /SpecialRun 4101d8 3836
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2912
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\36b9570a14ac21869cad456713714940.exe" -Force
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4048
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:352
- - C:\Windows\SysWOW64\timeout.exe
    timeout 1
    3⤵
    - Delays execution with timeout.exe
    PID:3748
- C:\Users\Admin\AppData\Local\Temp\36b9570a14ac21869cad456713714940.exe
  "C:\Users\Admin\AppData\Local\Temp\36b9570a14ac21869cad456713714940.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2188
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Set-MpPreference -PUAProtection 1
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3680
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Set-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows Defender Security Center\Notifications' -Name DisableNotifications -Value 1
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2924
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Add-MpPreference -ExclusionPath C:\
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3828
- - C:\Users\Admin\AppData\Roaming\client.exe
    "C:\Users\Admin\AppData\Roaming\client.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of WriteProcessMemory
    PID:4548
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Users\Admin\AppData\Roaming\valid.sa, rundll
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      PID:4624
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\System32\cmd.exe /c del "C:\Users\Admin\AppData\Roaming\client.exe"
      4⤵
      PID:4636
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2188 -s 2148
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4580
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 776 -s 2120
  2⤵
  - Drops file in Windows directory
  - Program crash
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3676

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/776-119-0x000000000C6A0000-0x000000000C6A1000-memory.dmp

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memory/776-114-0x00000000007B0000-0x00000000007B1000-memory.dmp

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memory/776-116-0x0000000004FF0000-0x0000000004FF1000-memory.dmp

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memory/776-117-0x0000000005700000-0x0000000005701000-memory.dmp

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memory/776-118-0x000000000AE10000-0x000000000B141000-memory.dmp

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memory/2188-190-0x0000000002D70000-0x0000000002D71000-memory.dmp

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memory/2188-138-0x0000000000400000-0x00000000006D4000-memory.dmp

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memory/2924-206-0x0000000006E63000-0x0000000006E64000-memory.dmp

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memory/2924-178-0x0000000006E62000-0x0000000006E63000-memory.dmp

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memory/2924-169-0x0000000006E60000-0x0000000006E61000-memory.dmp

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memory/3680-204-0x0000000007303000-0x0000000007304000-memory.dmp

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memory/3680-173-0x0000000007300000-0x0000000007301000-memory.dmp

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memory/3680-174-0x0000000007302000-0x0000000007303000-memory.dmp

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memory/3680-201-0x000000007E970000-0x000000007E971000-memory.dmp

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memory/3828-205-0x0000000006CF3000-0x0000000006CF4000-memory.dmp

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memory/3828-171-0x0000000006CF0000-0x0000000006CF1000-memory.dmp

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memory/3828-176-0x0000000006CF2000-0x0000000006CF3000-memory.dmp

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memory/3828-203-0x000000007F170000-0x000000007F171000-memory.dmp

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memory/4048-130-0x0000000006B30000-0x0000000006B31000-memory.dmp

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memory/4048-133-0x0000000004102000-0x0000000004103000-memory.dmp

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memory/4048-200-0x000000007F380000-0x000000007F381000-memory.dmp

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memory/4048-161-0x0000000007CD0000-0x0000000007CD1000-memory.dmp

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memory/4048-153-0x0000000007C80000-0x0000000007C81000-memory.dmp

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memory/4048-148-0x0000000007800000-0x0000000007801000-memory.dmp

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memory/4048-137-0x0000000007490000-0x0000000007491000-memory.dmp

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memory/4048-136-0x0000000007240000-0x0000000007241000-memory.dmp

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memory/4048-135-0x0000000007420000-0x0000000007421000-memory.dmp

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memory/4048-134-0x00000000071A0000-0x00000000071A1000-memory.dmp

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memory/4048-202-0x0000000004103000-0x0000000004104000-memory.dmp

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memory/4048-132-0x0000000004100000-0x0000000004101000-memory.dmp

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memory/4048-129-0x0000000004110000-0x0000000004111000-memory.dmp

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memory/4548-218-0x0000000002410000-0x0000000002445000-memory.dmp

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memory/4548-219-0x0000000000400000-0x0000000000901000-memory.dmp

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memory/4624-221-0x00000000032D0000-0x00000000032D7000-memory.dmp

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memory/4624-220-0x00000000032B0000-0x00000000032B5000-memory.dmp

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