darkcomet | 65b93dc4f5ea10da2e64ec26e012276e17e779717c7365823c30cd4249adcdf3

Windows Service

Processes:

vbc.exe

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

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

Windows Service

Processes:

vbc.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4"	vbc.exe

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

vbc.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	vbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	vbc.exe

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

vbc.exe

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	vbc.exe

Disables Task Manager via registry modification
evasion

UPX packed file 15 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2160-7-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-17-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-18-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-10-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-13-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-19-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-21-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-20-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-24-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-25-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-27-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-26-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-28-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-30-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2160-32-0x0000000000400000-0x00000000004BA000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

Processes:

Butterfly Knife Slaughter Skins.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WindowsUpdate.exe\""	Butterfly Knife Slaughter Skins.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Butterfly Knife Slaughter Skins.exe

description	pid	Process	procid_target
PID 2336 set thread context of 2160	2336	Butterfly Knife Slaughter Skins.exe	28

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

vbc.exe

pid	Process
2160	vbc.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

Processes:

vbc.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2160	vbc.exe
Token: SeSecurityPrivilege	2160	vbc.exe
Token: SeTakeOwnershipPrivilege	2160	vbc.exe
Token: SeLoadDriverPrivilege	2160	vbc.exe
Token: SeSystemProfilePrivilege	2160	vbc.exe
Token: SeSystemtimePrivilege	2160	vbc.exe
Token: SeProfSingleProcessPrivilege	2160	vbc.exe
Token: SeIncBasePriorityPrivilege	2160	vbc.exe
Token: SeCreatePagefilePrivilege	2160	vbc.exe
Token: SeBackupPrivilege	2160	vbc.exe
Token: SeRestorePrivilege	2160	vbc.exe
Token: SeShutdownPrivilege	2160	vbc.exe
Token: SeDebugPrivilege	2160	vbc.exe
Token: SeSystemEnvironmentPrivilege	2160	vbc.exe
Token: SeChangeNotifyPrivilege	2160	vbc.exe
Token: SeRemoteShutdownPrivilege	2160	vbc.exe
Token: SeUndockPrivilege	2160	vbc.exe
Token: SeManageVolumePrivilege	2160	vbc.exe
Token: SeImpersonatePrivilege	2160	vbc.exe
Token: SeCreateGlobalPrivilege	2160	vbc.exe
Token: 33	2160	vbc.exe
Token: 34	2160	vbc.exe
Token: 35	2160	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid	Process
2160	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Butterfly Knife Slaughter Skins.exe

description	pid	Process	procid_target
PID 2336 wrote to memory of 2160	2336	Butterfly Knife Slaughter Skins.exe	28
PID 2336 wrote to memory of 2160	2336	Butterfly Knife Slaughter Skins.exe	28
PID 2336 wrote to memory of 2160	2336	Butterfly Knife Slaughter Skins.exe	28
PID 2336 wrote to memory of 2160	2336	Butterfly Knife Slaughter Skins.exe	28
PID 2336 wrote to memory of 2160	2336	Butterfly Knife Slaughter Skins.exe	28
PID 2336 wrote to memory of 2160	2336	Butterfly Knife Slaughter Skins.exe	28
PID 2336 wrote to memory of 2160	2336	Butterfly Knife Slaughter Skins.exe	28
PID 2336 wrote to memory of 2160	2336	Butterfly Knife Slaughter Skins.exe	28

C:\Users\Admin\AppData\Local\Temp\Butterfly Knife Slaughter\Butterfly Knife Slaughter Skins.exe
"C:\Users\Admin\AppData\Local\Temp\Butterfly Knife Slaughter\Butterfly Knife Slaughter Skins.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2336
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
  2⤵
  - Modifies firewall policy service
  - Modifies security service
  - Windows security bypass
  - Disables RegEdit via registry modification
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2160

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Defense Evasion

Impair Defenses