darkcomet | c64fa16b03edb8bbfd00bb8edf4917220c1325b707c55f390c5230b6ee826440

System Information Discovery

Processes:

svhost.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	svhost.exe

Executes dropped EXE 1 IoCs

Processes:

svhost.exe

pid	Process
2792	svhost.exe

Loads dropped DLL 2 IoCs

Processes:

78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe

pid	Process
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exesvhost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\rundll32 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\rundll32 .exe"	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\svcmt = "C:\\Windows\\system32\\Windupdt\\svcmt.exe"	svhost.exe

Drops file in System32 directory 2 IoCs

Processes:

svhost.exe

description	ioc	Process
File created	C:\Windows\SysWOW64\Windupdt\svcmt.exe	svhost.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\svcmt.exe	svhost.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe

description	pid	Process	procid_target
PID 2424 set thread context of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32

UPX packed file 9 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2792-20-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2792-17-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2792-16-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2792-22-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2792-25-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2792-28-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2792-24-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2792-23-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2792-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

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 2 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

Processes:

svhost.exe78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

svhost.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	svhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	svhost.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

Processes:

svhost.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	svhost.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe

pid	Process
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exesvhost.exe

description	pid	Process
Token: SeDebugPrivilege	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	2792	svhost.exe
Token: SeSecurityPrivilege	2792	svhost.exe
Token: SeTakeOwnershipPrivilege	2792	svhost.exe
Token: SeLoadDriverPrivilege	2792	svhost.exe
Token: SeSystemProfilePrivilege	2792	svhost.exe
Token: SeSystemtimePrivilege	2792	svhost.exe
Token: SeProfSingleProcessPrivilege	2792	svhost.exe
Token: SeIncBasePriorityPrivilege	2792	svhost.exe
Token: SeCreatePagefilePrivilege	2792	svhost.exe
Token: SeBackupPrivilege	2792	svhost.exe
Token: SeRestorePrivilege	2792	svhost.exe
Token: SeShutdownPrivilege	2792	svhost.exe
Token: SeDebugPrivilege	2792	svhost.exe
Token: SeSystemEnvironmentPrivilege	2792	svhost.exe
Token: SeChangeNotifyPrivilege	2792	svhost.exe
Token: SeRemoteShutdownPrivilege	2792	svhost.exe
Token: SeUndockPrivilege	2792	svhost.exe
Token: SeManageVolumePrivilege	2792	svhost.exe
Token: SeImpersonatePrivilege	2792	svhost.exe
Token: SeCreateGlobalPrivilege	2792	svhost.exe
Token: 33	2792	svhost.exe
Token: 34	2792	svhost.exe
Token: 35	2792	svhost.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe

description	pid	Process	procid_target
PID 2424 wrote to memory of 2688	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	31
PID 2424 wrote to memory of 2688	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	31
PID 2424 wrote to memory of 2688	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	31
PID 2424 wrote to memory of 2688	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	31
PID 2424 wrote to memory of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32
PID 2424 wrote to memory of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32
PID 2424 wrote to memory of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32
PID 2424 wrote to memory of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32
PID 2424 wrote to memory of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32
PID 2424 wrote to memory of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32
PID 2424 wrote to memory of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32
PID 2424 wrote to memory of 2792	2424	78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe	32

C:\Users\Admin\AppData\Local\Temp\78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\78d772f3a58851bcbc72fe6565a0d1fa_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2424
- C:\Users\Admin\AppData\Local\Temp\winamp\svhost.exe
  C:\Users\Admin\AppData\Local\Temp\\winamp\svhost.exe
  2⤵
  PID:2688
- C:\Users\Admin\AppData\Local\Temp\winamp\svhost.exe
  C:\Users\Admin\AppData\Local\Temp\\winamp\svhost.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:2792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery