sality | 8c7bd2a1f8df671ec341342ca31082be1018f32f60e3ab62e6eb27869d665267

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	unyt_bs.exe

Sality
Sality is backdoor written in C++, first discovered in 2003.
backdoor sality
Sality family
sality

UAC bypass 3 TTPs 1 IoCs

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	unyt_bs.exe

Windows security bypass 2 TTPs 6 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	unyt_bs.exe

Windows security modification 2 TTPs 7 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	unyt_bs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	unyt_bs.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\Svc	unyt_bs.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	unyt_bs.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\E:	unyt_bs.exe

UPX packed file 16 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral5/memory/2956-2-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-6-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-5-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-4-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-7-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-25-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-8-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-27-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-26-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-30-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-31-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-32-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-33-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-34-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-36-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx
behavioral5/memory/2956-54-0x0000000001FE0000-0x000000000306E000-memory.dmp	upx

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SYSTEM.INI	unyt_bs.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	unyt_bs.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2956	unyt_bs.exe

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe
Token: SeDebugPrivilege	2956	unyt_bs.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 1108	2956	unyt_bs.exe	19
PID 2956 wrote to memory of 1192	2956	unyt_bs.exe	20
PID 2956 wrote to memory of 1252	2956	unyt_bs.exe	21
PID 2956 wrote to memory of 1928	2956	unyt_bs.exe	25

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	unyt_bs.exe

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1108

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1192

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1252
- C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\unyt_bs.exe
  "C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\unyt_bs.exe"
  2⤵
  - Modifies firewall policy service
  - UAC bypass
  - Windows security bypass
  - Windows security modification
  - Checks whether UAC is enabled
  - Enumerates connected drives
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:2956

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:1928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

Modify Registry