darkcomet | 23c827012aa8b32876e15f5d8f7f69451649a87ae61aad09c0dca8a7b340528d

System Information Discovery

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

Executes dropped EXE 1 IoCs

pid	Process
2816	%tmp%.exe

Loads dropped DLL 2 IoCs

pid	Process
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2816-17-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/files/0x0007000000018b6e-15.dat	upx
behavioral1/memory/2816-20-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/2816-24-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/2816-26-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/2816-28-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/2816-30-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/2816-32-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/2816-34-0x0000000000400000-0x00000000004F7000-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\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\rundll32 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\rundll32 .exe"	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.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 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	%tmp%.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\ProcessorNameString	%tmp%.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	%tmp%.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	%tmp%.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	%tmp%.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	%tmp%.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeDebugPrivilege	2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	2816	%tmp%.exe
Token: SeSecurityPrivilege	2816	%tmp%.exe
Token: SeTakeOwnershipPrivilege	2816	%tmp%.exe
Token: SeLoadDriverPrivilege	2816	%tmp%.exe
Token: SeSystemProfilePrivilege	2816	%tmp%.exe
Token: SeSystemtimePrivilege	2816	%tmp%.exe
Token: SeProfSingleProcessPrivilege	2816	%tmp%.exe
Token: SeIncBasePriorityPrivilege	2816	%tmp%.exe
Token: SeCreatePagefilePrivilege	2816	%tmp%.exe
Token: SeBackupPrivilege	2816	%tmp%.exe
Token: SeRestorePrivilege	2816	%tmp%.exe
Token: SeShutdownPrivilege	2816	%tmp%.exe
Token: SeDebugPrivilege	2816	%tmp%.exe
Token: SeSystemEnvironmentPrivilege	2816	%tmp%.exe
Token: SeChangeNotifyPrivilege	2816	%tmp%.exe
Token: SeRemoteShutdownPrivilege	2816	%tmp%.exe
Token: SeUndockPrivilege	2816	%tmp%.exe
Token: SeManageVolumePrivilege	2816	%tmp%.exe
Token: SeImpersonatePrivilege	2816	%tmp%.exe
Token: SeCreateGlobalPrivilege	2816	%tmp%.exe
Token: 33	2816	%tmp%.exe
Token: 34	2816	%tmp%.exe
Token: 35	2816	%tmp%.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 2816	2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe	31
PID 2540 wrote to memory of 2816	2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe	31
PID 2540 wrote to memory of 2816	2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe	31
PID 2540 wrote to memory of 2816	2540	b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b7776f72ccf809b930fe0afc01fa7cd8_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Users\Admin\AppData\Local\Temp\%tmp%.exe
  "C:\Users\Admin\AppData\Local\Temp\%tmp%.exe"
  2⤵
  - 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:2816

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