darkcomet | 673f8fe4cdbf3bdf71f356f9f2f193984281c4c5df802c277c385ed977c00eae

System Information Discovery

Processes:

vbc.exe

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

Processes:

7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

Processes:

CCleaner.exe

pid	Process
1716	CCleaner.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

Processes:

CCleaner.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CCleaner.exe = "C:\\Users\\Admin\\AppData\\Roaming\\YWEsNE\\uITCBo\\3.13.36.7162\\CCleaner.exe"	CCleaner.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

CCleaner.exe

description	pid	Process	procid_target
PID 1716 set thread context of 4720	1716	CCleaner.exe	87

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 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

Processes:

7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exeCCleaner.exevbc.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CCleaner.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.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:

vbc.exe

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	vbc.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

Processes:

vbc.exe

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

Suspicious use of AdjustPrivilegeToken 25 IoCs

Processes:

7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exevbc.exe

description	pid	Process
Token: SeDebugPrivilege	4356	7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	4720	vbc.exe
Token: SeSecurityPrivilege	4720	vbc.exe
Token: SeTakeOwnershipPrivilege	4720	vbc.exe
Token: SeLoadDriverPrivilege	4720	vbc.exe
Token: SeSystemProfilePrivilege	4720	vbc.exe
Token: SeSystemtimePrivilege	4720	vbc.exe
Token: SeProfSingleProcessPrivilege	4720	vbc.exe
Token: SeIncBasePriorityPrivilege	4720	vbc.exe
Token: SeCreatePagefilePrivilege	4720	vbc.exe
Token: SeBackupPrivilege	4720	vbc.exe
Token: SeRestorePrivilege	4720	vbc.exe
Token: SeShutdownPrivilege	4720	vbc.exe
Token: SeDebugPrivilege	4720	vbc.exe
Token: SeSystemEnvironmentPrivilege	4720	vbc.exe
Token: SeChangeNotifyPrivilege	4720	vbc.exe
Token: SeRemoteShutdownPrivilege	4720	vbc.exe
Token: SeUndockPrivilege	4720	vbc.exe
Token: SeManageVolumePrivilege	4720	vbc.exe
Token: SeImpersonatePrivilege	4720	vbc.exe
Token: SeCreateGlobalPrivilege	4720	vbc.exe
Token: 33	4720	vbc.exe
Token: 34	4720	vbc.exe
Token: 35	4720	vbc.exe
Token: 36	4720	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exeCCleaner.exe

description	pid	Process	procid_target
PID 4356 wrote to memory of 1716	4356	7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe	85
PID 4356 wrote to memory of 1716	4356	7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe	85
PID 4356 wrote to memory of 1716	4356	7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe	85
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87
PID 1716 wrote to memory of 4720	1716	CCleaner.exe	87

C:\Users\Admin\AppData\Local\Temp\7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7a72adbdbadf5788b08cab111e89aadd_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4356
- C:\Users\Admin\Documents\CCleaner.exe
  "C:\Users\Admin\Documents\CCleaner.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1716
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    3⤵
    - Checks BIOS information in registry
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:4720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

4

System Information Discovery

5

System Location Discovery

T1614

System Language Discovery