darkcomet | 6c17343bf1142d45fb727584a91ca85ed43a7fe16e92b516d5b4681fd340572c

System Information Discovery

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

Executes dropped EXE 1 IoCs

pid	Process
1176	winupdate.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Roaming\\Windupdt\\winupdate.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1644 set thread context of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82

System Location Discovery: System Language Discovery 1 TTPs 3 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	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.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

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

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	vbc.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4004	vbc.exe
Token: SeSecurityPrivilege	4004	vbc.exe
Token: SeTakeOwnershipPrivilege	4004	vbc.exe
Token: SeLoadDriverPrivilege	4004	vbc.exe
Token: SeSystemProfilePrivilege	4004	vbc.exe
Token: SeSystemtimePrivilege	4004	vbc.exe
Token: SeProfSingleProcessPrivilege	4004	vbc.exe
Token: SeIncBasePriorityPrivilege	4004	vbc.exe
Token: SeCreatePagefilePrivilege	4004	vbc.exe
Token: SeBackupPrivilege	4004	vbc.exe
Token: SeRestorePrivilege	4004	vbc.exe
Token: SeShutdownPrivilege	4004	vbc.exe
Token: SeDebugPrivilege	4004	vbc.exe
Token: SeSystemEnvironmentPrivilege	4004	vbc.exe
Token: SeChangeNotifyPrivilege	4004	vbc.exe
Token: SeRemoteShutdownPrivilege	4004	vbc.exe
Token: SeUndockPrivilege	4004	vbc.exe
Token: SeManageVolumePrivilege	4004	vbc.exe
Token: SeImpersonatePrivilege	4004	vbc.exe
Token: SeCreateGlobalPrivilege	4004	vbc.exe
Token: 33	4004	vbc.exe
Token: 34	4004	vbc.exe
Token: 35	4004	vbc.exe
Token: 36	4004	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 1644 wrote to memory of 4004	1644	1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe	82
PID 4004 wrote to memory of 1176	4004	vbc.exe	83
PID 4004 wrote to memory of 1176	4004	vbc.exe	83
PID 4004 wrote to memory of 1176	4004	vbc.exe	83

C:\Users\Admin\AppData\Local\Temp\1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\1d03e678086d7ed3f940daaabda794e4_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4004
- - C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe
    "C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1176

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

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

3

System Location Discovery

T1614

System Language Discovery