darkcomet | 5d12d8c7d715e980111ec339f59ca8f8c34adec411d53fd3531be9819d5b3251

System Information Discovery

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

Executes dropped EXE 2 IoCs

pid	Process
2568	csrss.exe
1284	csrss.exe

Loads dropped DLL 5 IoCs

pid	Process
2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe
2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe
2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe
2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe
2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe

UPX packed file 20 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000400000-0x0000000000911000-memory.dmp	upx
behavioral1/files/0x000b0000000120d5-24.dat	upx
behavioral1/memory/2292-42-0x0000000000400000-0x0000000000911000-memory.dmp	upx
behavioral1/memory/2568-40-0x0000000000400000-0x0000000000911000-memory.dmp	upx
behavioral1/memory/1284-47-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-48-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2568-50-0x0000000000400000-0x0000000000911000-memory.dmp	upx
behavioral1/memory/1284-52-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-51-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-53-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-54-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-55-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-56-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-57-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-60-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-62-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-64-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-66-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-68-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/1284-71-0x0000000000400000-0x00000000004B6000-memory.dmp	upx

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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe"	reg.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 5 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	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	csrss.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	csrss.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	csrss.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	csrss.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	csrss.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1284	csrss.exe
Token: SeSecurityPrivilege	1284	csrss.exe
Token: SeTakeOwnershipPrivilege	1284	csrss.exe
Token: SeLoadDriverPrivilege	1284	csrss.exe
Token: SeSystemProfilePrivilege	1284	csrss.exe
Token: SeSystemtimePrivilege	1284	csrss.exe
Token: SeProfSingleProcessPrivilege	1284	csrss.exe
Token: SeIncBasePriorityPrivilege	1284	csrss.exe
Token: SeCreatePagefilePrivilege	1284	csrss.exe
Token: SeBackupPrivilege	1284	csrss.exe
Token: SeRestorePrivilege	1284	csrss.exe
Token: SeShutdownPrivilege	1284	csrss.exe
Token: SeDebugPrivilege	1284	csrss.exe
Token: SeSystemEnvironmentPrivilege	1284	csrss.exe
Token: SeChangeNotifyPrivilege	1284	csrss.exe
Token: SeRemoteShutdownPrivilege	1284	csrss.exe
Token: SeUndockPrivilege	1284	csrss.exe
Token: SeManageVolumePrivilege	1284	csrss.exe
Token: SeImpersonatePrivilege	1284	csrss.exe
Token: SeCreateGlobalPrivilege	1284	csrss.exe
Token: 33	1284	csrss.exe
Token: 34	1284	csrss.exe
Token: 35	1284	csrss.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe
2568	csrss.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 1768	2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe	28
PID 2292 wrote to memory of 1768	2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe	28
PID 2292 wrote to memory of 1768	2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe	28
PID 2292 wrote to memory of 1768	2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe	28
PID 1768 wrote to memory of 2260	1768	cmd.exe	30
PID 1768 wrote to memory of 2260	1768	cmd.exe	30
PID 1768 wrote to memory of 2260	1768	cmd.exe	30
PID 1768 wrote to memory of 2260	1768	cmd.exe	30
PID 2292 wrote to memory of 2568	2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe	31
PID 2292 wrote to memory of 2568	2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe	31
PID 2292 wrote to memory of 2568	2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe	31
PID 2292 wrote to memory of 2568	2292	b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe	31
PID 2568 wrote to memory of 1284	2568	csrss.exe	32
PID 2568 wrote to memory of 1284	2568	csrss.exe	32
PID 2568 wrote to memory of 1284	2568	csrss.exe	32
PID 2568 wrote to memory of 1284	2568	csrss.exe	32
PID 2568 wrote to memory of 1284	2568	csrss.exe	32
PID 2568 wrote to memory of 1284	2568	csrss.exe	32
PID 2568 wrote to memory of 1284	2568	csrss.exe	32
PID 2568 wrote to memory of 1284	2568	csrss.exe	32
PID 2568 wrote to memory of 1284	2568	csrss.exe	32

C:\Users\Admin\AppData\Local\Temp\b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b11f04b1796fe2b24a5428960e3ee26e_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\Wqodj.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "csrss" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\csrss.exe" /f
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:2260
- C:\Users\Admin\AppData\Roaming\csrss.exe
  "C:\Users\Admin\AppData\Roaming\csrss.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2568
- - C:\Users\Admin\AppData\Roaming\csrss.exe
    "C:\Users\Admin\AppData\Roaming\csrss.exe"
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:1284

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery